@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:

• Allmaps plugin for Leaflet
• Allmaps plugin for MapLibre
• Allmaps plugin for OpenLayers

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>)

Sprite

Fields

• height (number)
• imageId (string)
• scaleFactor (number)
• spriteTileScale? (number)
• width (number)
• x (number)
• y (number)

SpritesInfo

Fields

• imageSize ([number, number])
• imageUrl (string)
• sprites (Array<Sprite>)

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

0

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> | undefined)

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#tileSize?

Type

[number, number]

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

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

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
  spritesInfo?: SpritesInfo | 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)
• `getImag