@allmaps/render

Allmaps render module. Renders georeferenced IIIF maps specified by a Georeference Annotation.

The following renderers are implemented:

CanvasRenderer: renders WarpedMaps to a HTML Canvas element with the Canvas 2D API
WebGL2Renderer: renders WarpedMaps to a WebGL 2 context
IntArrayRenderer: renders WarpedMaps to an IntArray

This module is mainly used in the Allmaps pipeline by the following packages:

It is also used in the Allmaps Preview worker.

How it works

The render module accomplishes this task with the following classes:

All renderers use the concept of a Viewport, describing coordinate reach that should be rendered. Create a viewport using it’s constructor or the static methods in the Viewport class. The CanvasRenderer and WebGL2Renderer can deduce a viewport from the current WarpedMapList and the size of their (WebGL2-enabled) canvas.
All renderers extend the BaseRenderer class, which implements the general actions of the (automatically throttled) render() calls: checking which maps are inside the current viewport, initially loading their image informations, checking which zoomlevel corresponds to the viewport, getting the IIIF tiles of that zoomlevel that are within the viewport.
- For the WebGL2Renderer, a WebGL2RenderingContext contains the rendering context for the drawing surface of an HTML element, and a WebGLProgram stores the vertex and fragment shader used for rendering a map, its lines and points.
A WarpedMap is made from every Georeferenced Map (which in term are parsed Georeference Annotations) and is added to the renderer and hence to its warpedMapList. It contains useful properties like mask, center, size … in resource, geospatial and projected geospatial coordinates. It contains a copy of the ground control points (GCPs) and resource masks, a projected version of the GCPs, a transformation built using the latter and usable to transform points from IIIF resource coordinates to projected geospatial coordinates.
- If WebGL2Renderer is used, a TriangulatedWarpedMap is created for every WarpedMap, finely triangulating the map, and a WebGL2WarpedMap is created, containing the WebGL2 information of the map (buffers etc.).
A WarpedMapList contains the list of WarpedMaps to draw and uses an RTree for geospatial map lookup.
A TileCache fetches and stores the image data of cached IIIF tiles.

From Georeference Annotation to a rendered map

During a CanvasRenderer or IntArrayRenderer render call, a map undergoes the following steps from Georeference Annotation to the canvas:

For each viewport pixel, from its viewport coordinates its projected geospatial coordinates are obtained and transformed to its corresponding resource coordinates, i.e. it’s location in the IIIF image.
We find the tile on which this point is located, and express the resource coordinates in local tile coordinates.
We set the color of this pixel from the colors of the four tile pixels surrounding the tile point, through a bilinear interpolation.

During a WebGL2Renderer render call, a map undergoes the following steps from Georeference Annotation to the canvas:

The resource mask is triangulated: the area within is divided into small triangles.
The optimal tile zoom level for the current viewport is searched, telling us which IIIF tile scaleFactor to use.
The Viewport is transformed backwards from projected geospatial coordinates to resource coordinates of the IIIF image. The IIIF tiles covering this viewport on the resource image are fetched and cached in the TileCache.
The area inside the resource mask is rendered in the viewport, triangle by triangle, using the cached tiles. The location of where to render each triangle is computed using the forward transformation built from the GPCs.

Installation

This package works in browsers and in Node.js as an ESM module.

Install with pnpm:

pnpm install @allmaps/render

You can optionally build this package locally by running:

pnpm run build

Usage

The most straightforward way to use the render logic in this package is by rendering a Georeference Annotation on a webmaps using one of the Allmaps plugins (which use the WebGL2Renderer) or setting up the Allmaps TileServer (which uses the CanvasRenderer).

It’s also possible to call a renderer directly:

CanvasRenderer

import { CanvasRenderer } from '@allmaps/render/canvas'

// Create a canvas and set your desired width and height
const canvas = document.getElementById('canvas')
canvas.width = width // Your width
canvas.height = height // Your height

// Create a renderer from your canvas
const renderer = new CanvasRenderer(canvas)

// Fetch and parse an annotation
const annotationUrl = 'https://annotations.allmaps.org/images/4af0fa9c8207b36c'
const annotation = await fetch(annotationUrl).then((response) =>
  response.json()
)

// Add the annotation to the renderer
await renderer.addGeoreferenceAnnotation(annotation)

// Render
// Note: no viewport specified, so one will be deduced. See below.
await renderer.render()

Notes:

Maps with strong warping may appear to not exactly follow the specified viewport. This is due the backwards transform being explicitly used in the CanvasRenderer and IntArrayRenderer (and not in the WebGL2Renderer). For maps with strong warping, the backwards transform is currently not exact (even for polynomial transformations).

WebGL2Renderer

import { WebGL2Renderer } from '@allmaps/render/webgl2'

// Create a canvas and set your desired width and height
const canvas = document.getElementById('canvas')
canvas.width = width // Your width
canvas.height = height // Your height

// Get the webgl context of your canvas
const gl = canvas.getContext('webgl2', { premultipliedAlpha: true })

// Create a renderer from your canvas
const renderer = new WebGL2Renderer(gl)

// Fetch and parse an annotation
const annotationUrl = 'https://annotations.allmaps.org/images/4af0fa9c8207b36c'
const annotation = await fetch(annotationUrl).then((response) =>
  response.json()
)

// Add the annotation to the renderer
await renderer.addGeoreferenceAnnotation(annotation)

// Render
// Note: no viewport specified, so one will be deduced. See below.
renderer.render()

Notes: the WebGL2Renderer is not fully functional yet.

The WebGL2Renderer works with events which are meant to trigger re-renders. This logic can currently be implemented outside of this library (see the plugins), and will be implemented within this library soon. As this will affect the API, please refrain from using this renderer as described above for now.
The WebGL2Renderer loads images via web-workers. The bundling needs to be optimised to support using this renderer in all possible environments.

IntArrayRenderer

import { IntArrayRenderer } from '@allmaps/render/intarray'

// Create a renderer
// See the IntArrayRenderer constructor for more info
// And the Allmaps Preview application for a concrete example
const renderer =
  new IntArrayRenderer() <
  D > // A data type
  (getImageData, // A function to get the image date from an image
  getImageDataValue, // A function to get the image data value from an image
  getImageDataSize, // A function to get the image data size from an image
  options) // IntArrayRenderer options

const annotationUrl = 'https://annotations.allmaps.org/images/4af0fa9c8207b36c'
const annotation = await fetch(annotationUrl).then((response) =>
  response.json()
)

await renderer.addGeoreferenceAnnotation(annotation)

// Create your viewport (mandatory for this renderer)
const viewport = viewport // Your viewport, see below

const image = await renderer.render(viewport)

Notes:

Maps with strong warping may appear to not exactly follow the specified viewport. This is due the backwards transform being explicitly used in the CanvasRenderer and IntArrayRenderer (and not in the WebGL2Renderer). For maps with strong warping, the backwards transform is currently not exact (even for polynomial transformations).

Creating a Viewport

The render() call of all renderers take a Viewport as input. For the IntArrayRenderer, this argument is required. For the others, it is optional: if unspecified a viewport will be deduced from the canvas size and the warpedMapList formed by the annotations.

A viewport can be created through one of the following options:

Directly using the Viewport constructor:

import { Viewport } from '@allmaps/render'

new Viewport(
  viewportSize, // Your viewport size, as [width, height]
  projectedGeoCenter, // Your center, in geo coordinates
  projectedGeoPerViewportScale, // Your geo-per-viewport scale
  {
    rotation, // Your rotation
    devicePixelRatio, // Your device pixel ratio, e.g. window.devicePixelRatio or just 1
    projection // Your projection (of the above projected geospatial coordinates), as compatible with Proj4js
  }
)

Using one of the following static methods:

Viewport.fromSizeAndMaps()
Viewport.fromSizeAndGeoPolygon()
Viewport.fromSizeAndProjectedGeoPolygon()
Viewport.fromScaleAndMaps()
Viewport.fromScaleAndGeoPolygon()
Viewport.fromScaleAndProjectedGeoPolygon()

For example, to derive a Viewport from a size and maps:

const viewport = Viewport.fromSizeAndMaps(
  viewportSize, // Your viewport size, as [width, height]
  warpedMapList, // Your WarpedMapList, e.g. `renderer.warpedMapList`
  partialExtendedViewportOptions // Your extended viewport options, including viewport options (rotation, devicePixelRatio and projection (used both to retrieve the extent of the maps and for the viewport itself)), a zoom; a fit; and WarpedMapList selection options like mapIds or `onlyVisible`
)

Or, to derive a Viewport from a scale and maps:

const viewport = Viewport.fromScaleAndMaps(
  projectedGeoPerViewportScale, // Your scale
  warpedMapList, // Your WarpedMapList, e.g. `renderer.warpedMapList`
  partialExtendedViewportOptions // Your extended viewport options, including viewport options (rotation, devicePixelRatio and projection (used both to retrieve the extent of the maps and for the viewport itself)), a zoom; and WarpedMapList selection options like mapIds or `onlyVisible`
)

// In this case, resize your canvas to the computed viewport
// before rendering, to encompass the entire image.
canvas.width = viewport.canvasSize[0]
canvas.height = viewport.canvasSize[1]
canvas.style.width = viewport.viewportSize[0] + 'px'
canvas.style.height = viewport.viewportSize[1] + 'px'
context.scale(viewport.devicePixelRatio, viewport.devicePixelRatio)

For usage examples in webmapping libraries, see the source code of the Allmaps plugins for Leaflet, MapLibre and OpenLayers.

Naming conventions

In this package the following naming conventions are used:

viewport... indicates properties described in viewport coordinates (i.e. with pixel size as perceived by the user)
canvas... indicates properties described in canvas coordinates, so viewport device pixel ratio (i.e. with effective pixel size in memory)
resource... indicates properties described in resource coordinates (i.e. IIIF tile coordinates of zoomlevel 1)
geo... indicates properties described in geospatial coordinates (‘WGS84’, i.e. [lon, lat])
projectedGeo... indicates properties described in projected geospatial coordinates (following a CRS, by default ‘EPSG:3857’ WebMercator)
tile... indicates properties described IIIF tile coordinates

License

MIT

API

`AnimationOptions`

Fields

animate (boolean)

`BaseRenderOptions`

Type

object & SpecificWarpedMapListOptions & Partial<WebGL2WarpedMapOptions>

`CanvasRenderOptions`

Type

object & SpecificWarpedMapListOptions & Partial<WebGL2WarpedMapOptions>

`GetWarpedMapOptions`

Type

W extends WebGL2WarpedMap
  ? WebGL2WarpedMapOptions
  : W extends TriangulatedWarpedMap
    ? TriangulatedWarpedMapOptions
    : W extends WarpedMap
      ? WarpedMapOptions
      : never

`IntArrayRenderOptions`

Type

object & SpecificWarpedMapListOptions & Partial<WebGL2WarpedMapOptions>

`ProjectionOptions`

Fields

projection ({id?: string; name?: string; definition: ProjectionDefinition})

`SelectionOptions`

Fields

geoBbox? ([number, number, number, number])
geoPoint? ([number, number])
mapIds? (Iterable<string>)
onlyVisible? (boolean)

`SpecificBaseRenderOptions`

Type

object

`SpecificTriangulatedWarpedMapOptions`

Fields

distortionMeasures (Array<DistortionMeasure>)
resourceResolution? (number)

`SpecificWarpedMapListOptions`

Fields

animatedOptions (Array<string>)
createRTree (boolean)
rtreeUpdatedOptions (Array<string>)

`TransformationOptions`

Fields

options? (unknown)
type ( | 'straight' | 'helmert' | 'polynomial' | 'polynomial1' | 'polynomial2' | 'polynomial3' | 'thinPlateSpline' | 'projective' | 'linear')

`new TriangulatedWarpedMap(mapId, georeferencedMap, listOptions, mapOptions)`

Creates an instance of a TriangulatedWarpedMap.

Parameters

mapId (string)
- ID of the map
georeferencedMap ({ type: "GeoreferencedMap"; resource: { type: "ImageService1" | "ImageService2" | "ImageService3" | "Canvas"; id: string; height?: number | undefined; width?: number | undefined; partOf?: ({ type: string; id: string; label?: Record<string, (string | number | boolean)[]> | undefined; } & { partOf?: ({ type: string; i...)
- Georeferenced map used to construct the WarpedMap
listOptions? (Partial<WarpedMapListOptions> | undefined)
mapOptions? (Partial<WarpedMapOptions> | undefined)

Returns

TriangulatedWarpedMap.

Extends

WarpedMap

`TriangulatedWarpedMap#clearProjectedTransformerCaches()`

Parameters

There are no parameters.

Returns

void.

`TriangulatedWarpedMap#clearProjectedTriangulationCaches()`

Parameters

There are no parameters.

Returns

void.

`TriangulatedWarpedMap#clearResourceTriangulationCaches()`

Parameters

There are no parameters.

Returns

void.

`TriangulatedWarpedMap#defaultOptions`

Type

SpecificTriangulatedWarpedMapOptions & WarpedMapOptions

`TriangulatedWarpedMap#georeferencedMapOptions`

Type

{ resourceResolution?: number | undefined; distortionMeasures?: Array<DistortionMeasure> | undefined; fetchFn?: FetchFn | undefined; gcps?: Array<Gcp> | undefined; resourceMask?: Ring | undefined; ... 5 more ...; distortionMeasure?: DistortionMeasure | undefined; }

`TriangulatedWarpedMap#listOptions`

Type

{ resourceResolution?: number | undefined; distortionMeasures?: Array<DistortionMeasure> | undefined; fetchFn?: FetchFn | undefined; gcps?: Array<Gcp> | undefined; resourceMask?: Ring | undefined; ... 5 more ...; distortionMeasure?: DistortionMeasure | undefined; }

`TriangulatedWarpedMap#mapOptions`

Type

{ resourceResolution?: number | undefined; distortionMeasures?: Array<DistortionMeasure> | undefined; fetchFn?: FetchFn | undefined; gcps?: Array<Gcp> | undefined; resourceMask?: Ring | undefined; ... 5 more ...; distortionMeasure?: DistortionMeasure | undefined; }

`TriangulatedWarpedMap#mixPreviousAndNew(t)`

Mix previous transform properties with new ones (when changing an ongoing animation).

Parameters

t (number)
- animation progress

Returns

void.

`TriangulatedWarpedMap#options`

Type

SpecificTriangulatedWarpedMapOptions & WarpedMapOptions

`TriangulatedWarpedMap#previousResourceResolution`

Type

number | undefined

`TriangulatedWarpedMap#previousTrianglePointsDistortion`

Type

Array<never>

`TriangulatedWarpedMap#projectedGcpPreviousTriangulation?`

Type

{
  resourceResolution: number | undefined
  gcpUniquePoints: GcpAndDistortions[]
  uniquePointIndices: number[]
  uniquePointIndexInterpolatedPolygon: TypedPolygon<number>
}

`TriangulatedWarpedMap#projectedGcpTriangulation?`

Type

{
  resourceResolution: number | undefined
  gcpUniquePoints: GcpAndDistortions[]
  uniquePointIndices: number[]
  uniquePointIndexInterpolatedPolygon: TypedPolygon<number>
}

`TriangulatedWarpedMap#projectedGcpTriangulationCache`

Type

Map<
  number,
  Map<string, Map<TransformationType, Map<string, GcpTriangulation>>>
>

`TriangulatedWarpedMap#projectedGeoPreviousTrianglePoints`

Type

Array<never>

`TriangulatedWarpedMap#projectedGeoPreviousTriangulationAppliableMask`

Type

Array<never>

`TriangulatedWarpedMap#projectedGeoPreviousTriangulationMask`

Type

Array<never>

`TriangulatedWarpedMap#projectedGeoTrianglePoints`

Type

Array<never>

`TriangulatedWarpedMap#projectedGeoTriangulationAppliableMask`

Type

Array<never>

`TriangulatedWarpedMap#projectedGeoTriangulationMask`

Type

Array<never>

`TriangulatedWarpedMap#resetPrevious()`

Reset previous transform properties to new ones (when completing an animation).

Parameters

There are no parameters.

Returns

void.

`TriangulatedWarpedMap#resourceResolution`

Type

number | undefined

`TriangulatedWarpedMap#resourceTrianglePoints`

Type

Array<never>

`TriangulatedWarpedMap#resourceTriangulationCache`

Type

Map<number, Map<string, TriangulationToUnique>>

`TriangulatedWarpedMap#setDefaultOptions()`

Set default options

Parameters

There are no parameters.

Returns

void.

`TriangulatedWarpedMap#setDistortionMeasure(distortionMeasure)`

Set the distortionMeasure

Parameters

distortionMeasure? (DistortionMeasure | undefined)
- the disortion measure

Returns

void.

`TriangulatedWarpedMap#setGcps(gcps)`

Update the ground control points loaded from a georeferenced map to new ground control points.

Parameters

gcps (Array<Gcp>)
- the new ground control points

Returns

void.

`TriangulatedWarpedMap#setInternalProjection(projection)`

Set the internal projection

Parameters

projection ({id?: string; name?: string; definition: ProjectionDefinition})
- the internal projection

Returns

void.

`TriangulatedWarpedMap#setProjection(projection)`

Set the projection

Parameters

projection ({id?: string; name?: string; definition: ProjectionDefinition})
- the projection

Returns

void.

`TriangulatedWarpedMap#setResourceMask(resourceFullMask, resourceAppliableMask, resourceMask)`

Update the resource mask loaded from a georeferenced map to a new mask.

Parameters

resourceFullMask (Array<Point>)
resourceAppliableMask (Array<Point>)
resourceMask (Array<Point>)
- the new mask

Returns

void.

`TriangulatedWarpedMap#trianglePointsDistortion`

Type

Array<never>

`TriangulatedWarpedMap#triangulateErrorCount`

Type

`TriangulatedWarpedMap#updateProjectedTransformerProperties()`

Parameters

There are no parameters.

Returns

void.

`TriangulatedWarpedMap#updateTrianglePoints()`

Derive the (previous and new) resource and projectedGeo points from their corresponding triangulations.

Also derive the (previous and new) triangulation-refined resource and projectedGeo mask

Parameters

There are no parameters.

Returns

void.

`TriangulatedWarpedMap#updateTrianglePointsDistortion()`

Derive the (previous and new) distortions from their corresponding triangulations.

Parameters

There are no parameters.

Returns

void.

`TriangulatedWarpedMap#updateTriangulation()`

Update the (previous and new) triangulation of the resourceMask. Use cache if available.

Parameters

There are no parameters.

Returns

void.

`TriangulatedWarpedMap.getDefaultOptions()`

Get default options

Parameters

There are no parameters.

Returns

SpecificTriangulatedWarpedMapOptions & WarpedMapOptions.

`TriangulatedWarpedMapOptions`

Type

SpecificTriangulatedWarpedMapOptions & WarpedMapOptions

`new Viewport(viewportSize, projectedGeoCenter, projectedGeoPerViewportScale, partialViewportOptions)`

Creates a new Viewport

Parameters

viewportSize ([number, number])
- Size of the viewport in viewport pixels, as [width, height].
projectedGeoCenter ([number, number])
- Center point of the viewport, in projected geospatial coordinates.
projectedGeoPerViewportScale (number)
- Scale of the viewport, in projection coordinates per viewport pixel.
partialViewportOptions? (Partial<ViewportOptions> | undefined)

Returns

Viewport.

`Viewport#canvasBbox`

Type

[number, number, number, number]

`Viewport#canvasCenter`

Type

[number, number]

`Viewport#canvasRectangle`

Type

[Point, Point, Point, Point]

`Viewport#canvasResolution`

Type

number

`Viewport#canvasSize`

Type

[number, number]

`Viewport#composeProjectedGeoToCanvasHomogeneousTransform()`

Parameters

There are no parameters.

Returns

[number, number, number, number, number, number].

`Viewport#composeProjectedGeoToClipHomogeneousTransform()`

Parameters

There are no parameters.

Returns

[number, number, number, number, number, number].

`Viewport#composeProjectedGeoToViewportHomogeneousTransform()`

Parameters

There are no parameters.

Returns

[number, number, number, number, number, number].

`Viewport#composeViewportToClipHomogeneousTransform()`

Parameters

There are no parameters.

Returns

[number, number, number, number, number, number].

`Viewport#computeProjectedGeoRectangle(viewportSize, projectedGeoPerViewportScale, rotation, projectedGeoCenter)`

Returns a rectangle in projected geospatial coordinates

The rectangle is the result of a horizontal rectangle in Viewport space of size ‘viewportSize’, scaled using projectedGeoPerViewportScale, centered, rotated using ‘rotation’ and translated to ‘projectedGeoCenter’.

Parameters

viewportSize ([number, number])
projectedGeoPerViewportScale (number)
rotation (number)
projectedGeoCenter ([number, number])

Returns

[Point, Point, Point, Point].

`Viewport#devicePixelRatio`

Type

number

`Viewport#geoCenter`

Type

[number, number]

`Viewport#geoRectangle`

Type

[Point, Point, Point, Point]

`Viewport#geoRectangleBbox`

Type

[number, number, number, number]

`Viewport#geoResolution`

Type

number

`Viewport#geoSize`

Type

[number, number]

`Viewport#getGeoBufferedRectangle(bufferFraction)`

Parameters

bufferFraction? (number | undefined)

Returns

[Point, Point, Point, Point].

`Viewport#getProjectedGeoBufferedRectangle(bufferFraction)`

Parameters

bufferFraction? (number | undefined)

Returns

[Point, Point, Point, Point].

`Viewport#projectedGeoCenter`

Type

[number, number]

`Viewport#projectedGeoPerCanvasScale`

Type

number

`Viewport#projectedGeoPerViewportScale`

Type

number

`Viewport#projectedGeoRectangle`

Type

[Point, Point, Point, Point]

`Viewport#projectedGeoRectangleBbox`

Type

[number, number, number, number]

`Viewport#projectedGeoResolution`

Type

number

`Viewport#projectedGeoSize`

Type

[number, number]

`Viewport#projectedGeoToCanvasHomogeneousTransform`

Type

[number, number, number, number, number, number]

`Viewport#projectedGeoToClipHomogeneousTransform`

Type

[number, number, number, number, number, number]

`Viewport#projectedGeoToViewportHomogeneousTransform`

Type

[number, number, number, number, number, number]

`Viewport#projection`

Type

{id?: string; name?: string; definition: ProjectionDefinition}

`Viewport#rotation`

Type

number

`Viewport#viewportBbox`

Type

[number, number, number, number]

`Viewport#viewportCenter`

Type

[number, number]

`Viewport#viewportRectangle`

Type

[Point, Point, Point, Point]

`Viewport#viewportResolution`

Type

number

`Viewport#viewportSize`

Type

[number, number]

`Viewport#viewportToClipHomogeneousTransform`

Type

[number, number, number, number, number, number]

`Viewport.fromScaleAndGeoPolygon(projectedGeoPerViewportScale, geoPolygon, partialExtendedViewportOptions)`

Static method that creates a Viewport from a scale and a polygon in geospatial coordinates, i.e. lon-lat EPSG:4326.

Note: the scale is still in projected geospatial per viewport pixel!

Parameters

projectedGeoPerViewportScale (number)
- Scale of the viewport, in projected geospatial coordinates per viewport pixel.
geoPolygon (Array<Array<Point>>)
- A polygon in geospatial coordinates.
partialExtendedViewportOptions? ( | Partial< {rotation: number; devicePixelRatio: number} & ProjectionOptions & ZoomOptions > | undefined)

Returns

A new Viewport object (Viewport).

`Viewport.fromScaleAndMaps(projectedGeoPerViewportScale, warpedMapList, partialExtendedViewportOptions)`

Static method that creates a Viewport from a scale and maps.

Optionally specify a projection, to be used both when obtaining the extent of selected warped maps in projected geospatial coordinates, as well as when create a viewport

Parameters

projectedGeoPerViewportScale (number)
- Scale of the viewport, in projected geospatial coordinates per viewport pixel.
warpedMapList (WarpedMapList<W>)
- A WarpedMapList.
partialExtendedViewportOptions? ( | Partial< {rotation: number; devicePixelRatio: number} & ProjectionOptions & ZoomOptions & SelectionOptions > | undefined)
- Optional viewport options.

Returns

A new Viewport object (Viewport).

`Viewport.fromScaleAndProjectedGeoPolygon(projectedGeoPerViewportScale, projectedGeoPolygon, partialExtendedViewportOptions)`

Static method that creates a Viewport from a scale and a polygon in projected geospatial coordinates.

Parameters

projectedGeoPerViewportScale (number)
- Scale of the viewport, in projected geospatial coordinates per viewport pixel.
projectedGeoPolygon (Array<Array<Point>>)
- A polygon in projected geospatial coordinates.
partialExtendedViewportOptions? ( | Partial< {rotation: number; devicePixelRatio: number} & ProjectionOptions & ZoomOptions > | undefined)

Returns

A new Viewport object (Viewport).

`Viewport.fromSizeAndGeoPolygon(viewportSize, geoPolygon, partialExtendedViewportOptions)`

Static method that creates a Viewport from a size and a polygon in geospatial coordinates, i.e. lon-lat EPSG:4326.

Parameters

viewportSize ([number, number])
- Size of the viewport in viewport pixels, as [width, height].
geoPolygon (Array<Array<Point>>)
- A polygon in geospatial coordinates.
partialExtendedViewportOptions? ( | Partial< {rotation: number; devicePixelRatio: number} & ProjectionOptions & ZoomOptions & FitOptions > | undefined)
- Optional viewport options

Returns

A new Viewport object (Viewport).

`Viewport.fromSizeAndMaps(viewportSize, warpedMapList, partialExtendedViewportOptions)`

Static method that creates a Viewport from a size and maps.

Optionally specify a projection, to be used both when obtaining the extent of selected warped maps in projected geospatial coordinates, as well as when create a viewport

Parameters

viewportSize ([number, number])
- Size of the viewport in viewport pixels, as [width, height].
warpedMapList (WarpedMapList<W>)
- A WarpedMapList.
partialExtendedViewportOptions? ( | Partial< {rotation: number; devicePixelRatio: number} & ProjectionOptions & ZoomOptions & FitOptions & SelectionOptions > | undefined)
- Optional viewport options

Returns

A new Viewport object (Viewport).

`Viewport.fromSizeAndProjectedGeoPolygon(viewportSize, projectedGeoPolygon, partialExtendedViewportOptions)`

Static method that creates a Viewport from a size and a polygon in projected geospatial coordinates.

Parameters

viewportSize ([number, number])
- Size of the viewport in viewport pixels, as [width, height].
projectedGeoPolygon (Array<Array<Point>>)
- A polygon in projected geospatial coordinates.
partialExtendedViewportOptions? ( | Partial< {rotation: number; devicePixelRatio: number} & ProjectionOptions & ZoomOptions & FitOptions > | undefined)
- Optional viewport options

Returns

A new Viewport object (Viewport).

`new WarpedMap(mapId, georeferencedMap, listOptions, mapOptions)`

Creates an instance of WarpedMap.

Parameters

mapId (string)
- ID of the map
georeferencedMap ({ type: "GeoreferencedMap"; resource: { type: "ImageService1" | "ImageService2" | "ImageService3" | "Canvas"; id: string; height?: number | undefined; width?: number | undefined; partOf?: ({ type: string; id: string; label?: Record<string, (string | number | boolean)[]> | undefined; } & { partOf?: ({ type: string; i...)
- Georeferenced map used to construct the WarpedMap
listOptions (Partial<WarpedMapListOptions> | undefined)
mapOptions (Partial<WarpedMapOptions> | undefined)

Returns

WarpedMap.

Extends

EventTarget

`WarpedMap#abortController?`

Type

AbortController

`WarpedMap#applyOptions(animationOptions)`

Parameters

animationOptions? (Partial<AnimationOptions & AnimationOptionsInternal> | undefined)

Returns

object.

`WarpedMap#clearProjectedTransformerCaches()`

Parameters

There are no parameters.

Returns

void.

`WarpedMap#defaultOptions`

Type

{
  fetchFn?: FetchFn
  gcps: Gcp[]
  resourceMask: Ring
  transformationType: TransformationType
  internalProjection: Projection
  projection: Projection
  visible: boolean
  applyMask: boolean
  distortionMeasure: DistortionMeasure | undefined
}

`WarpedMap#destroy()`

Parameters

There are no parameters.

Returns

void.

`WarpedMap#distortionMeasure?`

Type

'log2sigma' | 'twoOmega' | 'airyKavr' | 'signDetJ' | 'thetaa'

`WarpedMap#fetchableTilesForViewport`

Type

Array<never>

`WarpedMap#fetchingImageInfo`

Type

boolean

`WarpedMap#gcps`

Type

Array<Gcp>

`WarpedMap#geoAppliableMask`

Type

Array<Point>

`WarpedMap#geoAppliableMaskBbox`

Type

[number, number, number, number]

`WarpedMap#geoAppliableMaskRectangle`

Type

[Point, Point, Point, Point]

`WarpedMap#geoFullMask`

Type

Array<Point>

`WarpedMap#geoFullMaskBbox`

Type

[number, number, number, number]

`WarpedMap#geoFullMaskRectangle`

Type

[Point, Point, Point, Point]

`WarpedMap#geoMask`

Type

Array<Point>

`WarpedMap#geoMaskBbox`

Type

[number, number, number, number]

`WarpedMap#geoMaskRectangle`

Type

[Point, Point, Point, Point]

`WarpedMap#geoPoints`

Type

Array<Point>

`WarpedMap#georeferencedMap`

Type

{ type: "GeoreferencedMap"; resource: { type: "ImageService1" | "ImageService2" | "ImageService3" | "Canvas"; id: string; height?: number | undefined; width?: number | undefined; partOf?: ({ type: string; id: string; label?: Record<string, (string | number | boolean)[]> | undefined; } & { partOf?: ({ type: string; i...

`WarpedMap#georeferencedMapOptions`

Type

{ fetchFn?: FetchFn | undefined; gcps?: Array<Gcp> | undefined; resourceMask?: Ring | undefined; transformationType?: TransformationType | undefined; ... 4 more ...; distortionMeasure?: DistortionMeasure | undefined; }

`WarpedMap#getDefaultAndGeoreferencedMapOptions()`

Get default and georeferenced map options

Parameters

There are no parameters.

Returns

{ fetchFn?: FetchFn gcps: Gcp[] resourceMask: Ring transformationType: TransformationType internalProjection: Projection projection: Projection visible: boolean applyMask: boolean distortionMeasure: DistortionMeasure | undefined }.

`WarpedMap#getProjectedTransformer(transformationType, partialProjectedGcpTransformerOptions)`

Get a projected transformer of the given transformation type.

Uses cashed projected transformers by transformation type, and only computes a new projected transformer if none found.

Returns a projected transformer in the current projection, even if the cached transformer was computed in a different projection.

Default settings apply for the options.

Parameters

transformationType ( | 'straight' | 'helmert' | 'polynomial' | 'polynomial1' | 'polynomial2' | 'polynomial3' | 'thinPlateSpline' | 'projective' | 'linear')
partialProjectedGcpTransformerOptions? (Partial<ProjectedGcpTransformerOptions> | undefined)

Returns

A projected transformer (ProjectedGcpTransformer).

`WarpedMap#getReferenceScale()`

Get the reference scaling from the forward transformation of the projected Helmert transformer

Parameters

There are no parameters.

Returns

number.

`WarpedMap#getResourceFullMask()`

Parameters

There are no parameters.

Returns

[Point, Point, Point, Point].

`WarpedMap#getResourceToCanvasScale(viewport)`

Get scale of the warped map, in resource pixels per canvas pixels.

Parameters

viewport (Viewport)
- the current viewport

Returns

number.

`WarpedMap#getResourceToViewportScale(viewport)`

Get scale of the warped map, in resource pixels per viewport pixels.

Parameters

viewport (Viewport)
- the current viewport

Returns

number.

`WarpedMap#hasImage()`

Check if this instance has parsed image

Parameters

There are no parameters.

Returns

boolean.

`WarpedMap#image?`

Type

Image

`WarpedMap#internalProjection`

Type

{id?: string; name?: string; definition: ProjectionDefinition}

`WarpedMap#listOptions`

Type

{ createRTree?: boolean | undefined; rtreeUpdatedOptions?: Array<string> | undefined; animatedOptions?: Array<string> | undefined; renderMaps?: boolean | undefined; renderLines?: boolean | undefined; renderPoints?: boolean | undefined; ... 58 more ...; distortionMeasure?: DistortionMeasure | undefined; }

`WarpedMap#loadImage(imagesById)`

Load the parsed image from cache, or fetch and parse the image info to create it

Parameters

imagesById (Map<string, Image>)

Returns

Promise<void>.

`WarpedMap#mapId`

Type

string

`WarpedMap#mapOptions`

Type

{ fetchFn?: FetchFn | undefined; gcps?: Array<Gcp> | undefined; resourceMask?: Ring | undefined; transformationType?: TransformationType | undefined; ... 4 more ...; distortionMeasure?: DistortionMeasure | undefined; }

`WarpedMap#mixPreviousAndNew(t)`

Mix previous transform properties with new ones (when changing an ongoing animation).

Parameters

t (number)
- animation progress

Returns

void.

`WarpedMap#mixed`

Type

false

`WarpedMap#options`

Type

{
  fetchFn?: FetchFn
  gcps: Gcp[]
  resourceMask: Ring
  transformationType: TransformationType
  internalProjection: Projection
  projection: Projection
  visible: boolean
  applyMask: boolean
  distortionMeasure: DistortionMeasure | undefined
}

`WarpedMap#overviewFetchableTilesForViewport`

Type

Array<never>

`WarpedMap#overviewTileZoomLevelForViewport?`

Type

{
  scaleFactor: number
  width: number
  height: number
  originalWidth: number
  originalHeight: number
  columns: number
  rows: number
}

`WarpedMap#previousDistortionMeasure?`

Type

'log2sigma' | 'twoOmega' | 'airyKavr' | 'signDetJ' | 'thetaa'

`WarpedMap#previousInternalProjection`

Type

{id?: string; name?: string; definition: ProjectionDefinition}

`WarpedMap#previousTransformationType`

Type

  | 'straight'
  | 'helmert'
  | 'polynomial'
  | 'polynomial1'
  | 'polynomial2'
  | 'polynomial3'
  | 'thinPlateSpline'
  | 'projective'
  | 'linear'

`WarpedMap#projectedGcps`

Type

Array<Gcp>

`WarpedMap#projectedGeoAppliableMask`

Type

Array<Point>

`WarpedMap#projectedGeoAppliableMaskBbox`

Type

[number, number, number, number]

`WarpedMap#projectedGeoAppliableMaskRectangle`

Type

[Point, Point, Point, Point]

`WarpedMap#projectedGeoBufferedViewportRectangleBboxForViewport?`

Type

[number, number, number, number]

`WarpedMap#projectedGeoBufferedViewportRectangleForViewport?`

Type

[Point, Point, Point, Point]

`WarpedMap#projectedGeoFullMask`

Type

Array<Point>

`WarpedMap#projectedGeoFullMaskBbox`

Type

[number, number, number, number]

`WarpedMap#projectedGeoFullMaskRectangle`

Type

[Point, Point, Point, Point]

`WarpedMap#projectedGeoMask`

Type

Array<Point>

`WarpedMap#projectedGeoMaskBbox`

Type

[number, number, number, number]

`WarpedMap#projectedGeoMaskRectangle`

Type

[Point, Point, Point, Point]

`WarpedMap#projectedGeoPoints`

Type

Array<Point>

`WarpedMap#projectedGeoPreviousTransformedResourcePoints`

Type

Array<Point>

`WarpedMap#projectedGeoTransformedResourcePoints`

Type

Array<Point>

`WarpedMap#projectedPreviousTransformer`

Type

ProjectedGcpTransformer

`WarpedMap#projectedTransformer`

Type

ProjectedGcpTransformer

`WarpedMap#projectedTransformerCache`

Type

Map<TransformationType, ProjectedGcpTransformer>

`WarpedMap#projectedTransformerDoubleCache`

Type

Map<TransformationType, Map<string, ProjectedGcpTransformer>>

`WarpedMap#projection`

Type

{id?: string; name?: string; definition: ProjectionDefinition}

`WarpedMap#resetForViewport()`

Reset the properties for the current values

Parameters

There are no parameters.

Returns

void.

`WarpedMap#resetPrevious()`

Reset previous transform properties to new ones (when completing an animation).

Parameters

There are no parameters.

Returns

void.

`WarpedMap#resourceAppliableMask`

Type

Array<Point>

`WarpedMap#resourceAppliableMaskBbox`

Type

[number, number, number, number]

`WarpedMap#resourceAppliableMaskRectangle`

Type

[Point, Point, Point, Point]

`WarpedMap#resourceBufferedViewportRingBboxAndResourceMaskBboxIntersectionForViewport?`

Type

[number, number, number, number]

`WarpedMap#resourceBufferedViewportRingBboxForViewport?`

Type

[number, number, number, number]

`WarpedMap#resourceBufferedViewportRingForViewport?`

Type

Array<Point>

`WarpedMap#resourceFullMask`

Type

Array<Point>

`WarpedMap#resourceFullMaskBbox`

Type

[number, number, number, number]

`WarpedMap#resourceFullMaskRectangle`

Type

[Point, Point, Point, Point]

`WarpedMap#resourceMask`

Type

Array<Point>

`WarpedMap#resourceMaskBbox`

Type

[number, number, number, number]

`WarpedMap#resourceMaskRectangle`

Type

[Point, Point, Point, Point]

`WarpedMap#resourcePoints`

Type

Array<Point>

`WarpedMap#resourceToProjectedGeoScale`

Type

number

`WarpedMap#setDefaultOptions()`

Parameters

There are no parameters.

Returns

void.

`WarpedMap#setDistortionMeasure(distortionMeasure)`

Set the distortionMeasure

Parameters

distortionMeasure? (DistortionMeasure | undefined)
- the disortion measure

Returns

void.

`WarpedMap#setFetchableTilesForViewport(fetchableTiles)`

Set tiles for the current viewport

Parameters

fetchableTiles (Array<FetchableTile>)

Returns

void.

`WarpedMap#setGcps(gcps)`

Update the ground control points loaded from a georeferenced map to new ground control points.

Parameters

gcps (Array<Gcp>)

Returns

void.

`WarpedMap#setInternalProjection(projection)`

Set the internal projection

Parameters

projection? (Projection | undefined)
- the internal projection

Returns

void.

`WarpedMap#setListOptions(listOptions, animationOptions)`

Parameters

listOptions? (Partial<WarpedMapOptions> | undefined)
animationOptions? (Partial<AnimationOptions> | undefined)

Returns

object.

`WarpedMap#setMapOptions(mapOptions, listOptions, animationOptions)`

Parameters

mapOptions? (Partial<WarpedMapOptions> | undefined)
listOptions? (Partial<WarpedMapOptions> | undefined)
animationOptions? (Partial<AnimationOptions & AnimationOptionsInternal> | undefined)

Returns

object.

`WarpedMap#setOverviewFetchableTilesForViewport(overviewFetchableTiles)`

Set overview tiles for the current viewport

Parameters

overviewFetchableTiles (Array<FetchableTile>)

Returns

void.

`WarpedMap#setOverviewTileZoomLevelForViewport(tileZoomLevel)`

Set the overview tile zoom level for the current viewport

Parameters

tileZoomLevel? (TileZoomLevel | undefined)
- tile zoom level for the current viewport

Returns

void.

`WarpedMap#setProjectedGeoBufferedViewportRectangleForViewport(projectedGeoBufferedViewportRectangle)`

Set projectedGeoBufferedViewportRectangle for the current viewport

Parameters

projectedGeoBufferedViewportRectangle? (Rectangle | undefined)

Returns

void.

`WarpedMap#setProjection(projection)`

Set the projection

Parameters

projection? (Projection | undefined)
- the projection

Returns

void.

`WarpedMap#setResourceBufferedViewportRingBboxAndResourceMaskBboxIntersectionForViewport(resourceBufferedViewportRingBboxAndResourceMaskBboxIntersection)`

Set resourceBufferedViewportRingBboxAndResourceMaskBboxIntersection for the current viewport

Parameters

resourceBufferedViewportRingBboxAndResourceMaskBboxIntersection? (Bbox | undefined)

Returns

void.

`WarpedMap#setResourceBufferedViewportRingForViewport(resourceBufferedViewportRing)`

Set resourceBufferedViewportRing for the current viewport

Parameters

resourceBufferedViewportRing? (Ring | undefined)

Returns

void.

`WarpedMap#setResourceMask(resourceFullMask, resourceAppliableMask, resourceMask)`

Update the resource mask loaded from a georeferenced map to a new mask.

Parameters

resourceFullMask (Array<Point>)
resourceAppliableMask (Array<Point>)
resourceMask (Array<Point>)

Returns

void.

`WarpedMap#setTileZoomLevelForViewport(tileZoomLevel)`

Set the tile zoom level for the current viewport

Parameters

tileZoomLevel? (TileZoomLevel | undefined)
- tile zoom level for the current viewport

Returns

void.

`WarpedMap#setTransformationType(transformationType)`

Set the transformationType

Parameters

transformationType ( | 'straight' | 'helmert' | 'polynomial' | 'polynomial1' | 'polynomial2' | 'polynomial3' | 'thinPlateSpline' | 'projective' | 'linear')

Returns

void.

`WarpedMap#shouldRenderLines()`

Parameters

There are no parameters.

Returns

boolean.

`WarpedMap#shouldRenderMap()`

Parameters

There are no parameters.

Returns

boolean.

`WarpedMap#shouldRenderPoints()`

Parameters

There are no parameters.

Returns

boolean.

`WarpedMap#tileZoomLevelForViewport?`

Type

{
  scaleFactor: number
  width: number
  height: number
  originalWidth: number
  originalHeight: number
  columns: number
  rows: number
}

`WarpedMap#transformationType`

Type

  | 'straight'
  | 'helmert'
  | 'polynomial'
  | 'polynomial1'
  | 'polynomial2'
  | 'polynomial3'
  | 'thinPlateSpline'
  | 'projective'
  | 'linear'

`WarpedMap#updateAppliableGeoMask()`

Parameters

There are no parameters.

Returns

void.

`WarpedMap#updateFullGeoMask()`

Parameters

There are no parameters.

Returns

void.

`WarpedMap#updateGcpsProperties()`

Parameters

There are no parameters.

Returns

void.

`WarpedMap#updateGeoMask()`

Parameters

There are no parameters.

Returns

void.

`WarpedMap#updateGeoMaskProperties()`

Parameters

There are no parameters.

Returns

void.

`WarpedMap#updateProjectedAppliableGeoMask()`

Parameters

There are no parameters.

Returns

void.

`WarpedMap#updateProjectedFullGeoMask()`

Parameters

There are no parameters.

Returns

void.

`WarpedMap#updateProjectedGeoMask()`

Parameters

There are no parameters.

Returns

void.

`WarpedMap#updateProjectedGeoMaskProperties()`

Parameters

There are no parameters.

Returns

void.

`WarpedMap#updateProjectedTransformer()`

Parameters

There are no parameters.

Returns

void.

`WarpedMap#updateProjectedTransformerProperties()`

Parameters

There are no parameters.

Returns

void.

`WarpedMap#updateResourceMaskProperties()`

Parameters

There are no parameters.

Returns

void.

`WarpedMap#updateResourceToProjectedGeoScale()`

Parameters

There are no parameters.

Returns

void.

`WarpedMap.getDefaultOptions()`

Get default options

Parameters

There are no parameters.

Returns

`new WarpedMapEvent(type, data)`

Parameters

type (WarpedMapEventType)
data? (Partial<WarpedMapEventData> | undefined)

Returns

WarpedMapEvent.

Extends

Event

`WarpedMapEvent#data?`

Type

{
  mapIds?: Array<string> | undefined
  tileUrl?: string | undefined
  optionKeys?: Array<string> | undefined
}

`new WarpedMapList(warpedMapFactory, options)`

Creates an instance of a WarpedMapList

Parameters

warpedMapFactory (( mapId: string, georeferencedMap: GeoreferencedMap, listOptions?: Partial<WarpedMapListOptions>, mapOptions?: Partial<WarpedMapOptions> ) => W)
- Factory function for creating WarpedMap objects
options? (Partial<WarpedMapListOptions> | undefined)
- Options of this list, which will be set on newly added maps as their list options

Returns

WarpedMapList<W>.

Extends

EventTarget

`WarpedMapList#addEventListenersToWarpedMap(warpedMap)`

Parameters

warpedMap (W)

Returns

void.

`WarpedMapList#addGeoreferenceAnnotation(annotation, mapOptions)`

Parses an annotation and adds its georeferenced map to this list

Parameters

annotation (unknown)
- Annotation
mapOptions? (Partial<GetWarpedMapOptions<W>> | undefined)
- Map options

Returns

Map IDs of the maps that were added, or an error per map (Promise<Array<string | Error>>).

`WarpedMapList#addGeoreferencedMap(georeferencedMap, mapOptions)`

Adds a georeferenced map to this list

Parameters

georeferencedMap (unknown)
- Georeferenced Map
mapOptions? (Partial<GetWarpedMapOptions<W>> | undefined)
- Map options

Returns

Map ID of the map that was added (Promise<string>).

`WarpedMapList#addGeoreferencedMapInternal(georeferencedMap, mapOptions)`

Parameters

georeferencedMap ({ type: "GeoreferencedMap"; resource: { type: "ImageService1" | "ImageService2" | "ImageService3" | "Canvas"; id: string; height?: number | undefined; width?: number | undefined; partOf?: ({ type: string; id: string; label?: Record<string, (string | number | boolean)[]> | undefined; } & { partOf?: ({ type: string; i...)
mapOptions? (Partial<GetWarpedMapOptions<W>> | undefined)

Returns

Promise<string>.

`WarpedMapList#addImageInfos(imageInfos)`

Adds image informations, parses them to images and adds them to the image cache

Parameters

imageInfos (Array<unknown>)
- Image informations

Returns

Image IDs of the image informations that were added (Array<string>).

`WarpedMapList#addToOrUpdateRtree(warpedMap)`

Parameters

warpedMap (W)

Returns

void.

`WarpedMapList#bringMapsForward(mapIds)`

Changes the z-index of the specified maps to bring them forward

Parameters

mapIds (Iterable<string>)
- Map IDs

Returns

void.

`WarpedMapList#bringMapsToFront(mapIds)`

Changes the z-index of the specified maps to bring them to front

Parameters

mapIds (Iterable<string>)
- Map IDs

Returns

void.

`WarpedMapList#clear()`

Parameters

There are no parameters.

Returns

void.

`WarpedMapList#destroy()`

Parameters

There are no parameters.

Returns

void.

`WarpedMapList#getDefaultOptions()`

Get the default options of the list

Parameters

There are no parameters.

Returns

SpecificWarpedMapListOptions & Partial<WebGL2WarpedMapOptions> & GetWarpedMapOptions<W>.

`WarpedMapList#getMapDefaultOptions(mapId)`

Get the default options of a map

These come from the default option settings for WebGL2WarpedMaps and the map’s georeferenced map proporties

Parameters

mapId (string)
- Map ID for which the options apply

Returns

GetWarpedMapOptions<W> | undefined.

`WarpedMapList#getMapIds(partialSelectionOptions)`

Get mapIds for selected maps

The selectionOptions allow a.o. to:

filter for visible maps
filter for specific mapIds
filter for maps whose geoBbox overlap with the specified geoBbox
filter for maps that overlap with a given geoPoint

Parameters

partialSelectionOptions? (Partial<SelectionOptions> | undefined)
- Selection options (e.g. mapIds), defaults to all visible maps

Returns

mapIds (Array<string>).

`WarpedMapList#getMapMapOptions(mapId)`

Get the map-specific options of a map

Parameters

mapId (string)
- Map ID for which the options apply

Returns

Partial<GetWarpedMapOptions<W>> | undefined.

`WarpedMapList#getMapOptions(mapId)`

Get the options of a map

These options are the result of merging the default, georeferenced map, layer and map-specific options of that map.

Parameters

mapId (string)
- Map ID for which the options apply

Returns

GetWarpedMapOptions<W> | undefined.

`WarpedMapList#getMapZIndex(mapId)`

Get the z-index of a map

Parameters

mapId (string)
- Map ID for which to get the z-index

Returns

number | undefined.

`WarpedMapList#getMapsBbox(partialSelectionAndProjectionOptions)`

Get the bounding box of the maps in this list

The result is returned in the list’s projection, EPSG:3857 by default Use {projection: {definition: ‘EPSG:4326’}} to request the result in lon-lat EPSG:4326

Parameters

partialSelectionAndProjectionOptions? (Partial<SelectionOptions & ProjectionOptions> | undefined)
- Selection (e.g. mapIds) and projection options, defaults to all visible maps and current projection

Returns

The bbox of all selected maps, in the chosen projection, or undefined if there were no maps matching the selection (Bbox | undefined).

`WarpedMapList#getMapsCenter(partialSelectionAndProjectionOptions)`

Get the center of the bounding box of the maps in this list

The result is returned in the list’s projection, EPSG:3857 by default Use {projection: {definition: ‘EPSG:4326’}} to request the result in lon-lat EPSG:4326

Parameters

partialSelectionAndProjectionOptions? (Partial<SelectionOptions & ProjectionOptions> | undefined)
- Selection (e.g. mapIds) and projection options, defaults to all visible maps and current projection

Returns

The center of the bbox of all selected maps, in the chosen projection, or undefined if there were no maps matching the selection (Point | undefined).

`WarpedMapList#getMapsConvexHull(partialSelectionAndProjectionOptions)`

Get the convex hull of the maps in this list

The result is returned in the list’s projection, EPSG:3857 by default Use {projection: {definition: ‘EPSG:4326’}} to request the result in lon-lat EPSG:4326

Parameters

partialSelectionAndProjectionOptions? (Partial<SelectionOptions & ProjectionOptions> | undefined)
- Selection (e.g. mapIds) and projection options, defaults to all visible maps and current projection

Returns

The convex hull of all selected maps, in the chosen projection, or undefined if there were no maps matching the selection (Ring | undefined).

`WarpedMapList#getOptions()`

Get the options of this list

Parameters

There are no parameters.

Returns

{ createRTree?: boolean | undefined; rtreeUpdatedOptions?: Array<string> | undefined; animatedOptions?: Array<string> | undefined; renderMaps?: boolean | undefined; renderLines?: boolean | undefined; renderPoints?: boolean | undefined; ... 58 more ...; distortionMeasure?: DistortionMeasure | undefined; }.

`WarpedMapList#getOrComputeMapId(georeferencedMap)`

Parameters

georeferencedMap ({ type: "GeoreferencedMap"; resource: { type: "ImageService1" | "ImageService2" | "ImageService3" | "Canvas"; id: string; height?: number | undefined; width?: number | undefined; partOf?: ({ type: string; id: string; label?: Record<string, (string | number | boolean)[]> | undefined; } & { partOf?: ({ type: string; i...)

Returns

Promise<string>.

`WarpedMapList#getProjectedGeoMaskPoints(partialSelectionAndProjectionOptions)`

Parameters

partialSelectionAndProjectionOptions? (Partial<SelectionOptions & ProjectionOptions> | undefined)

Returns

Array<Point>.

`WarpedMapList#getWarpedMap(mapId)`

Get the WarpedMap instance for a map

Parameters

mapId (string)
- Map ID of the requested WarpedMap instance

Returns

WarpedMap instance, or undefined (W | undefined).

`WarpedMapList#getWarpedMaps(partialSelectionOptions)`

Get the WarpedMap instances for selected maps

The selectionOptions allow a.o. to:

filter for visible maps
filter for specific mapIds
filter for maps whose geoBbox overlap with the specified geoBbox
filter for maps that overlap with a given geoPoint

Parameters

partialSelectionOptions? (Partial<SelectionOptions> | undefined)
- Selection options (e.g. mapIds), defaults to all visible maps

Returns

WarpedMap instances (Iterable<W>).

`WarpedMapList#imageLoaded(mapId)`

Parameters

mapId (string)

Returns

void.

`WarpedMapList#imagesById`

Type

Map<string, Image>

`WarpedMapList#internalSetMapsOptionsByMapId(mapOptionsByMapId, listOptions, animationOptions)`

Internal set map options

Parameters

mapOptionsByMapId? (Map<string, Partial<WarpedMapListOptions> | undefined> | undefined)
listOptions? (Partial<WarpedMapListOptions> | undefined)
animationOptions? (Partial<AnimationOptions> | undefined)

Returns

void.

`WarpedMapList#options`

Type

SpecificWarpedMapListOptions & Partial<WebGL2WarpedMapOptions>

`WarpedMapList#orderMapIdsByZIndex(mapId0, mapId1)`

Order mapIds

Use this as anonymous sort function in Array.prototype.sort()

Parameters

mapId0 (string)
mapId1 (string)

Returns

number.

`WarpedMapList#removeEventListenersFromWarpedMap(warpedMap)`

Parameters

warpedMap (W)

Returns

void.

`WarpedMapList#removeFromRtree(warpedMap)`

Parameters

warpedMap (W)

Returns

void.

`WarpedMapList#removeGeoreferenceAnnotation(annotation)`

Parses an annotation and removes its georeferenced map from this list

Parameters

annotation (unknown)

Returns

Map IDs of the maps that were removed, or an error per map (Promise<Array<string | Error>>).

`WarpedMapList#removeGeoreferencedMap(georeferencedMap)`

Removes a georeferenced map from this list

Parameters

georeferencedMap (unknown)

Returns

Map ID of the removed map, or an error (Promise<string | Error>).

`WarpedMapList#removeGeoreferencedMapById(mapId)`

Removes a georeferenced map from the list by its ID

Parameters

mapId (string)
- Map ID

Returns

Map ID of the removed map, or an error (Promise<string | Error | undefined>).

`WarpedMapList#removeGeoreferencedMapByIdInternal(mapId)`

Parameters

mapId (string)

Returns

Promise<string>.

`WarpedMapList#removeGeoreferencedMapInternal(georeferencedMap)`

Parameters

georeferencedMap ({ type: "GeoreferencedMap"; resource: { type: "ImageService1" | "ImageService2" | "ImageService3" | "Canvas"; id: string; height?: number | undefined; width?: number | undefined; partOf?: ({ type: string; id: string; label?: Record<string, (string | number | boolean)[]> | undefined; } & { partOf?: ({ type: string; i...)

Returns

Promise<string>.

`WarpedMapList#removeZIndexHoles()`

Parameters

There are no parameters.

Returns

void.

`WarpedMapList#resetMapsOptions(mapIds, mapOptionKeys, listOptionKeys, animationOptions)`

Resets the map-specific options of maps (and the list options)

An empty array resets all options, undefined resets no options.

Parameters

mapIds (Array<string>)
- Map IDs for which to reset the options
mapOptionKeys? (Array<string> | undefined)
- Keys of the map-specific options to reset
listOptionKeys? (Array<string> | undefined)
- Keys of the list options to reset
animationOptions? (Partial<AnimationOptions> | undefined)
- Animation options

Returns

void.

`WarpedMapList#resetMapsOptionsByMapId(mapOptionkeysByMapId, listOptionKeys, animationOptions)`

Resets the map-specific options of maps by map ID (and the list options)

An empty array or map resets all options (for all maps), undefined resets no options.

Parameters

mapOptionkeysByMapId? (Map<string, Array<string>> | undefined)
- Keys of map-specific options to reset by map ID
listOptionKeys? (Array<string> | undefined)
- Keys of the list options to reset
animationOptions? (Partial<AnimationOptions> | undefined)
- Animation options

Returns

void.

`WarpedMapList#resetOptions(listOptionKeys, animationOptions)`

Resets the list options

An empty array resets all options, undefined resets no options.

Parameters

listOptionKeys? (Array<string> | undefined)
- Keys of the list options to reset
animationOptions? (Partial<AnimationOptions> | undefined)
- Animation options

Returns

void.

`WarpedMapList#rtree?`

Type

RTree

`WarpedMapList#sendMapsBackward(mapIds)`

Changes the zIndex of the specified maps to send them backward

Parameters

mapIds (Iterable<string>)
- Map IDs

Returns

void.

`WarpedMapList#sendMapsToBack(mapIds)`

Changes the z-index of the specified maps to send them to back

Parameters

mapIds (Iterable<string>)
- Map IDs

Returns

void.

`WarpedMapList#setMapsOptions(mapIds, mapOptions, listOptions, animationOptions)`

Set the map-specific options of maps (and the list options)

Parameters

mapIds (Array<string>)
- Map IDs for which the options apply
mapOptions? (Partial<WarpedMapListOptions> | undefined)
- Map-specific options
listOptions? (Partial<WarpedMapListOptions> | undefined)
- list options
animationOptions? (Partial<AnimationOptions> | undefined)
- Animation options

Returns

void.

`WarpedMapList#setMapsOptionsByMapId(mapOptionsByMapId, listOptions, animationOptions)`

Set the map-specific options of maps by map ID (and the list options)

This is useful when when multiple (and possibly different) map-specific options are changed at once, but only one animation should be fired

Parameters

mapOptionsByMapId? (Map<string, Partial<WarpedMapListOptions>> | undefined)
- Map-specific options by map ID
listOptions? (Partial<WarpedMapListOptions> | undefined)
- List options
animationOptions? (Partial<AnimationOptions> | undefined)
- Animation options

Returns

void.

`WarpedMapList#setOptions(options, animationOptions)`

Set the options of this list

Note: Map-specific options set here will be passed to newly added maps.

Parameters

options? (Partial<WarpedMapListOptions> | undefined)
- List Options
animationOptions? (Partial<AnimationOptions> | undefined)
- Animation options

Returns

void.

`WarpedMapList#warpedMapFactory`

Type

(
  mapId: string,
  georeferencedMap: GeoreferencedMap,
  listOptions?: Partial<WarpedMapListOptions>,
  mapOptions?: Partial<WarpedMapOptions>
) => W

`WarpedMapList#warpedMapsById`

Maps in this list, indexed by their ID (Map<string, W>).

`WarpedMapList#zIndices`

Type

Map<string, number>

`WarpedMapListOptions`

Type

SpecificWarpedMapListOptions & Partial<WebGL2WarpedMapOptions>

`WarpedMapOptions`

Fields

applyMask (boolean)
distortionMeasure (DistortionMeasure | undefined)
fetchFn? (( input: Request | string | URL, init?: RequestInit ) => Promise<Response>)
gcps (Array<Gcp>)
internalProjection ({id?: string; name?: string; definition: ProjectionDefinition})
projection ({id?: string; name?: string; definition: ProjectionDefinition})
resourceMask (Array<Point>)
transformationType ( | 'straight' | 'helmert' | 'polynomial' | 'polynomial1' | 'polynomial2' | 'polynomial3' | 'thinPlateSpline' | 'projective' | 'linear')
visible (boolean)

`createWarpedMapFactory()`

Parameters

There are no parameters.

Returns

( mapId: string, georeferencedMap: GeoreferencedMap, listOptions?: Partial<WarpedMapListOptions>, mapOptions?: Partial<WarpedMapOptions> ) => WarpedMap.

`new IntArrayRenderer(getImageData, getImageDataValue, getImageDataSize, options)`

Parameters

getImageData ((data: Uint8ClampedArray) => D)
getImageDataValue ((data: D, index: number) => number)
getImageDataSize ((data: D) => Size)
options? (Partial<BaseRenderOptions> | undefined)

Returns

IntArrayRenderer<D>.

Extends

BaseRenderer
Renderer

`IntArrayRenderer#getImageDataSize`

Type

(data: D) => Size

`IntArrayRenderer#getImageDataValue`

Type

(data: D, index: number) => number

`IntArrayRenderer#render(viewport)`

Render the map for a given viewport.

Parameters

viewport (Viewport)
- the viewport to render

Returns

Promise<Uint8ClampedArray<ArrayBufferLike>>.

`new CanvasRenderer(canvas, options)`

Parameters

canvas (HTMLCanvasElement)
options? (Partial<BaseRenderOptions> | undefined)

Returns

CanvasRenderer.

Extends

BaseRenderer
Renderer

`CanvasRenderer#canvas`

Type

HTMLCanvasElement

`CanvasRenderer#context`

Type

CanvasRenderingContext2D

`CanvasRenderer#getTileImageData(data, index)`

Parameters

data (ImageData)
index (number)

Returns

number.

`CanvasRenderer#getTileSize(data)`

Parameters

data (ImageData)

Returns

[number, number].

`CanvasRenderer#render(viewport)`

Render the map for a given viewport.

If no viewport is specified, a viewport is deduced based on the WarpedMapList and canvas width and hight.

Parameters

viewport? (Viewport | undefined)
- the viewport to render

Returns

Promise<void>.

`SpecificWebGL2RenderOptions`

Type

object

`SpecificWebGL2WarpedMapOptions`

Fields

colorize (boolean)
colorizeColor (string)
debugTiles (boolean)
debugTriangles (boolean)
debugTriangulation (boolean)
distortionColor00 (string)
distortionColor01 (string)
distortionColor1 (string)
distortionColor2 (string)
distortionColor3 (string)
opacity (number)
removeColor (boolean)
removeColorColor (string)
removeColorHardness (number)
removeColorThreshold (number)
renderAppliableMask (boolean)
renderAppliableMaskBorderColor? (string)
renderAppliableMaskBorderSize? (number)
renderAppliableMaskColor? (string)
renderAppliableMaskSize? (number)
renderFullMask (boolean)
renderFullMaskBorderColor? (string)
renderFullMaskBorderSize? (number)
renderFullMaskColor? (string)
renderFullMaskSize? (number)
renderGcps (boolean)
renderGcpsBorderColor? (string)
renderGcpsBorderSize? (number)
renderGcpsColor? (string)
renderGcpsSize? (number)
renderGrid (boolean)
renderGridColor (string)
renderLines? (boolean)
renderMaps? (boolean)
renderMask (boolean)
renderMaskBorderColor? (string)
renderMaskBorderSize? (number)
renderMaskColor? (string)
renderMaskSize? (number)
renderPoints? (boolean)
renderTransformedGcps (boolean)
renderTransformedGcpsBorderColor? (string)
renderTransformedGcpsBorderSize? (number)
renderTransformedGcpsColor? (string)
renderTransformedGcpsSize? (number)
renderVectors (boolean)
renderVectorsBorderColor? (string)
renderVectorsBorderSize? (number)
renderVectorsColor? (string)
renderVectorsSize? (number)
saturation (number)

`WebGL2RenderOptions`

Type

object & SpecificWarpedMapListOptions & Partial<WebGL2WarpedMapOptions>

`new WebGL2Renderer(gl, options)`

Creates an instance of WebGL2Renderer.

Parameters

gl (WebGL2RenderingContext)
- WebGL 2 rendering context
options? (Partial<WebGL2RenderOptions> | undefined)
- options

Returns

WebGL2Renderer.

Extends

BaseRenderer
Renderer

`WebGL2Renderer#addEventListenersToWebGL2WarpedMap(webgl2WarpedMap)`

Parameters

webgl2WarpedMap (WebGL2WarpedMap)

Returns

void.

`WebGL2Renderer#animatedChange(event)`

Parameters

event (Event)

Returns

void.

`WebGL2Renderer#animating`

Type

false

`WebGL2Renderer#animationFrame(now, mapIds)`

Parameters

now (number)
mapIds (Array<string>)

Returns

void.

`WebGL2Renderer#animationProgress`

Type

`WebGL2Renderer#animationStart`

Type

number | undefined

`WebGL2Renderer#cancelThrottledFunctions()`

Parameters

There are no parameters.

Returns

void.

`WebGL2Renderer#changed()`

Parameters

There are no parameters.

Returns

void.

`WebGL2Renderer#clear()`

Parameters

There are no parameters.

Returns

void.

`WebGL2Renderer#clearMap(mapId)`

Parameters

mapId (string)

Returns

void.

`WebGL2Renderer#contextLost()`

Parameters

There are no parameters.

Returns

void.

`WebGL2Renderer#contextRestored()`

Parameters

There are no parameters.

Returns

void.

`WebGL2Renderer#destroy()`

Parameters

There are no parameters.

Returns

void.

`WebGL2Renderer#disableRender`

Type

false

`WebGL2Renderer#finishAnimation(mapIds)`

Parameters

mapIds (Array<string>)

Returns

void.

`WebGL2Renderer#gl`

Type

WebGL2RenderingContext

`WebGL2Renderer#imageLoaded(event)`

Parameters

event (Event)

Returns

void.

`WebGL2Renderer#immediateChange(event)`

Parameters

event (Event)

Returns

void.

`WebGL2Renderer#initializeWebGL(gl)`

Parameters

gl (WebGL2RenderingContext)

Returns

void.

`WebGL2Renderer#lastAnimationFrameRequestId`

Type

number | undefined

`WebGL2Renderer#linesProgram`

Type

WebGLProgram

`WebGL2Renderer#mapProgram`

Type

WebGLProgram

`WebGL2Renderer#mapTileDeleted(event)`

Parameters

event (Event)

Returns

void.

`WebGL2Renderer#mapTileLoaded(event)`

Parameters

event (Event)

Returns

void.

`WebGL2Renderer#options`

Type

{ createRTree?: boolean | undefined; rtreeUpdatedOptions?: Array<string> | undefined; animatedOptions?: Array<string> | undefined; renderMaps?: boolean | undefined; renderLines?: boolean | undefined; renderPoints?: boolean | undefined; ... 58 more ...; distortionMeasure?: DistortionMeasure | undefined; }

`WebGL2Renderer#pointsProgram`

Type

WebGLProgram

`WebGL2Renderer#prepareChange(event)`

Parameters

event (Event)

Returns

void.

`WebGL2Renderer#prepareRenderInternal()`

Parameters

There are no parameters.

Returns

void.

`WebGL2Renderer#previousSignificantViewport`

Type

Viewport | undefined

`WebGL2Renderer#removeEventListenersFromWebGL2WarpedMap(webgl2WarpedMap)`

Parameters

webgl2WarpedMap (WebGL2WarpedMap)

Returns

void.

`WebGL2Renderer#render(viewport)`

Render the map for a given viewport.

If no viewport is specified the current viewport is rerendered. If no current viewport is known, a viewport is deduced based on the WarpedMapList and canvas width and hight.

Parameters

viewport? (Viewport | undefined)
- the current viewport

Returns

void.

`WebGL2Renderer#renderInternal()`

Parameters

There are no parameters.

Returns

void.

`WebGL2Renderer#renderLinesInternal()`

Parameters

There are no parameters.

Returns

void.

`WebGL2Renderer#renderMapsInternal()`

Parameters

There are no parameters.

Returns

void.

`WebGL2Renderer#renderPointsInternal()`

Parameters

There are no parameters.

Returns

void.

`WebGL2Renderer#resetPrevious(mapIds)`

Parameters

mapIds? (Array<string> | undefined)

Returns

void.

`WebGL2Renderer#setLinesProgramMapUniforms(webgl2WarpedMap)`

Parameters

webgl2WarpedMap (WebGL2WarpedMap)

Returns

void.

`WebGL2Renderer#setLinesProgramUniforms()`

Parameters

There are no parameters.

Returns

void.

`WebGL2Renderer#setMapProgramMapUniforms(webgl2WarpedMap)`

Parameters

webgl2WarpedMap (WebGL2WarpedMap)

Returns

void.

`WebGL2Renderer#setMapProgramUniforms()`

Parameters

There are no parameters.

Returns

void.

`WebGL2Renderer#setPointsProgramMapUniforms(webgl2WarpedMap)`

Parameters

webgl2WarpedMap (WebGL2WarpedMap)

Returns

void.

`WebGL2Renderer#setPointsProgramUniforms()`

Parameters

There are no parameters.

Returns

void.

`WebGL2Renderer#shouldAnticipateInteraction()`

Parameters

There are no parameters.

Returns

boolean.

`WebGL2Renderer#shouldRequestFetchableTiles()`

Parameters

There are no parameters.

Returns

boolean.

`WebGL2Renderer#startAnimation(mapIds)`

Parameters

mapIds (Array<string>)

Returns

void.

`WebGL2Renderer#throttledChanged`

Type

DebouncedFunc<() => void>

`WebGL2Renderer#throttledPrepareRenderInternal`

Type

DebouncedFunc<() => void>

`WebGL2Renderer#updateMapsForViewport(allFechableTilesForViewport, allRequestedTilesForViewport)`

Parameters

allFechableTilesForViewport (Array<FetchableTile>)
allRequestedTilesForViewport (Array<FetchableTile>)

Returns

{mapsEnteringViewport: string[]; mapsLeavingViewport: string[]}.

`WebGL2Renderer#updateVertexBuffers(mapIds)`

Parameters

mapIds? (Array<string> | undefined)

Returns

void.

`WebGL2Renderer#warpedMapAdded(event)`

Parameters

event (Event)

Returns

void.

`new WebGL2WarpedMap(mapId, georeferencedMap, gl, mapProgram, linesProgram, pointsProgram, listOptions, mapOptions)`

Creates an instance of WebGL2WarpedMap.

Parameters

mapId (string)
- ID of the map
georeferencedMap ({ type: "GeoreferencedMap"; resource: { type: "ImageService1" | "ImageService2" | "ImageService3" | "Canvas"; id: string; height?: number | undefined; width?: number | undefined; partOf?: ({ type: string; id: string; label?: Record<string, (string | number | boolean)[]> | undefined; } & { partOf?: ({ type: string; i...)
- Georeferenced map used to construct the WarpedMap
gl (WebGL2RenderingContext)
- WebGL rendering context
mapProgram (WebGLProgram)
- WebGL program for map
linesProgram (WebGLProgram)
pointsProgram (WebGLProgram)
listOptions? (Partial<WarpedMapListOptions> | undefined)
mapOptions? (Partial<WebGL2WarpedMapOptions> | undefined)

Returns

WebGL2WarpedMap.

Extends

TriangulatedWarpedMap

`WebGL2WarpedMap#addCachedTileAndUpdateTextures(cachedTile)`

Add cached tile to the textures of this map and update textures

Parameters

cachedTile (CachedTile<ImageData>)

Returns

void.

`WebGL2WarpedMap#applyOptions(animationOptions)`

Parameters

animationOptions? (Partial<AnimationOptions> | undefined)

Returns

object.

`WebGL2WarpedMap#cachedTilesByTileKey`

Type

Map<string, CachedTile<ImageData>>

`WebGL2WarpedMap#cachedTilesByTileUrl`

Type

Map<string, CachedTile<ImageData>>

`WebGL2WarpedMap#cachedTilesForTexture`

Type

Array<never>

`WebGL2WarpedMap#cachedTilesResourceOriginPointsAndDimensionsTexture`

Type

null

`WebGL2WarpedMap#cachedTilesScaleFactorsTexture`

Type

null

`WebGL2WarpedMap#cachedTilesTextureArray`

Type

null

`WebGL2WarpedMap#cancelThrottledFunctions()`

Parameters

There are no parameters.

Returns

void.

`WebGL2WarpedMap#clearTextures()`

Clear textures for this map

Parameters

There are no parameters.

Returns

void.

`WebGL2WarpedMap#defaultOptions`

Type

SpecificWebGL2WarpedMapOptions &
  SpecificTriangulatedWarpedMapOptions &
  WarpedMapOptions

`WebGL2WarpedMap#destroy()`

Parameters

There are no parameters.

Returns

void.

`WebGL2WarpedMap#georeferencedMapOptions`

Type

{ renderMaps?: boolean | undefined; renderLines?: boolean | undefined; renderPoints?: boolean | undefined; renderGcps?: boolean | undefined; renderGcpsColor?: string | undefined; renderGcpsSize?: number | undefined; renderGcpsBorderColor?: string | undefined; ... 54 more ...; distortionMeasure?: DistortionMeasure | ...

`WebGL2WarpedMap#getCachedTilesAtOtherScaleFactors(tile)`

Parameters

tile ({ column: number row: number tileZoomLevel: TileZoomLevel imageSize: Size })

Returns

Array<CachedTile<ImageData>>.

`WebGL2WarpedMap#gl`

Type

WebGL2RenderingContext

`WebGL2WarpedMap#image`

Type

Image

`WebGL2WarpedMap#imageId`

Type

string

`WebGL2WarpedMap#initializeWebGL(mapProgram, linesProgram, pointsProgram)`

Parameters

mapProgram (WebGLProgram)
linesProgram (WebGLProgram)
pointsProgram (WebGLProgram)

Returns

void.

`WebGL2WarpedMap#invertedRenderHomogeneousTransform`

Type

[number, number, number, number, number, number]

`WebGL2WarpedMap#lineGroups`

Type

Array<never>

`WebGL2WarpedMap#linesProgram`

Type

WebGLProgram

`WebGL2WarpedMap#linesVao`

Type

null

`WebGL2WarpedMap#listOptions`

Type

{ renderMaps?: boolean | undefined; renderLines?: boolean | undefined; renderPoints?: boolean | undefined; renderGcps?: boolean | undefined; renderGcpsColor?: string | undefined; renderGcpsSize?: number | undefined; renderGcpsBorderColor?: string | undefined; ... 54 more ...; distortionMeasure?: DistortionMeasure | ...

`WebGL2WarpedMap#mapOptions`

Type

{ renderMaps?: boolean | undefined; renderLines?: boolean | undefined; renderPoints?: boolean | undefined; renderGcps?: boolean | undefined; renderGcpsColor?: string | undefined; renderGcpsSize?: number | undefined; renderGcpsBorderColor?: string | undefined; ... 54 more ...; distortionMeasure?: DistortionMeasure | ...

`WebGL2WarpedMap#mapProgram`

Type

WebGLProgram

`WebGL2WarpedMap#mapVao`

Type

null

`WebGL2WarpedMap#options`

Type

SpecificWebGL2WarpedMapOptions &
  SpecificTriangulatedWarpedMapOptions &
  WarpedMapOptions

`WebGL2WarpedMap#pointGroups`

Type

Array<never>

`WebGL2WarpedMap#pointsProgram`

Type

WebGLProgram

`WebGL2WarpedMap#pointsVao`

Type

null

`WebGL2WarpedMap#previousCachedTilesForTexture`

Type

Array<never>

`WebGL2WarpedMap#removeCachedTileAndUpdateTextures(tileUrl)`

Remove cached tile from the textures of this map and update textures

Parameters

tileUrl (string)

Returns

void.

`WebGL2WarpedMap#setDefaultOptions()`

Set default options

Parameters

There are no parameters.

Returns

void.

`WebGL2WarpedMap#setLineGroups()`

Parameters

There are no parameters.

Returns

void.

`WebGL2WarpedMap#setPointGroups()`

Parameters

There are no parameters.

Returns

void.

`WebGL2WarpedMap#shouldRenderLines()`

Parameters

There are no parameters.

Returns

boolean.

`WebGL2WarpedMap#shouldRenderMap()`

Parameters

There are no parameters.

Returns

boolean.

`WebGL2WarpedMap#shouldRenderPoints()`

Parameters

There are no parameters.

Returns

boolean.

`WebGL2WarpedMap#throttledUpdateTextures`

Type

DebouncedFunc<() => Promise<void>>

`WebGL2WarpedMap#tileInCachedTiles(tile)`

Parameters

tile ({ column: number row: number tileZoomLevel: TileZoomLevel imageSize: Size })

Returns

boolean.

`WebGL2WarpedMap#tileToCachedTile(tile)`

Parameters

tile ({ column: number row: number tileZoomLevel: TileZoomLevel imageSize: Size })

Returns

CachedTile<ImageData> | undefined.

`WebGL2WarpedMap#updateCachedTilesForTextures()`

Parameters

There are no parameters.

Returns

void.

`WebGL2WarpedMap#updateTextures()`

Parameters

There are no parameters.

Returns

Promise<void>.

`WebGL2WarpedMap#updateVertexBuffers(projectedGeoToClipHomogeneousTransform)`

Update the vertex buffers of this warped map

Parameters

projectedGeoToClipHomogeneousTransform ([number, number, number, number, number, number])
- Transform from projected geo coordinates to webgl2 coordinates in the [-1, 1] range. Equivalent to OpenLayers’ projectionTransform.

Returns

void.

`WebGL2WarpedMap#updateVertexBuffersLines(projectedGeoToClipHomogeneousTransform)`

Parameters

projectedGeoToClipHomogeneousTransform ([number, number, number, number, number, number])

Returns

void.

`WebGL2WarpedMap#updateVertexBuffersMap(projectedGeoToClipHomogeneousTransform)`

Parameters

projectedGeoToClipHomogeneousTransform ([number, number, number, number, number, number])

Returns

void.

`WebGL2WarpedMap#updateVertexBuffersPoints(projectedGeoToClipHomogeneousTransform)`

Parameters

projectedGeoToClipHomogeneousTransform ([number, number, number, number, number, number])

Returns

void.

`WebGL2WarpedMap.getDefaultOptions()`

Get default options

Parameters

There are no parameters.

Returns

SpecificWebGL2WarpedMapOptions & SpecificTriangulatedWarpedMapOptions & WarpedMapOptions.

`WebGL2WarpedMapOptions`

Type

SpecificWebGL2WarpedMapOptions &
  SpecificTriangulatedWarpedMapOptions &
  WarpedMapOptions