@allmaps/openlayers

Allmaps plugin for OpenLayers. This plugin allows displaying georeferenced IIIF images on an OpenLayers map. The plugin works by loading Georeference Annotations and uses WebGL to transform images from a IIIF image server to overlay them on their correct geographical position.

See allmaps.org for more information.

Examples:

How it works

This plugin exports the class WarpedMapLayer. You can add one or multiple Georeference Annotations (or AnnotationPages that contain multiple Georeference Annotations) to a WarpedMapLayer and add the WarpedMapLayer to your OpenLayers map. This will render all georeferenced maps defined by the Georeference Annotations.

To understand what happens under the hood for each georeferenced map, see the @allmaps/render package.

This plugin implements a lot of methods from @allmaps/warpedmaplayer, the core package gathering the functionality connecting the Allmaps plugins to the @allmaps/render package.

Installation

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

Install with pnpm:

pnpm install @allmaps/openlayers

You can optionally build this package locally by running:

pnpm run build

The easiest way to test this package during local development is via @allmaps/test-plugins. A minimal example is also included in ./index.html and can be served via pnpm run dev.

Usage

Built for OpenLayers 10, but should work with OpenLayers 9, 8, 7 and 6 as well.

Adding a WarpedMapLayer to a MapLibre Map

Creating a WarpedMapLayer and adding a Georeference Annotation to an OpenLayers map looks like this:

import OpenLayersMap from 'ol/Map'
import Tile from 'ol/layer/Tile'
import OSM from 'ol/source/OSM'

import { WarpedMapLayer } from '@allmaps/openlayers'

const map = new OpenLayersMap({
  target: 'map',
  layers: [
    new Tile({
      source: new OSM()
    })
  ]
})

const annotationUrl = 'https://annotations.allmaps.org/maps/a9458d2f895dcdfb'
const warpedMapLayer = new WarpedMapLayer()

map.addLayer(warpedMapLayer)
warpedMapLayer.addGeoreferenceAnnotationByUrl(annotationUrl).then(() => {
  const bbox = warpedMapLayer.getBbox({
    projection: { definition: 'EPSG:3857' }
  })
  if (bbox) {
    map.getView().fit(bbox)
  }
})

Ways to load Georeference Annotations

Once the layer has been added to the map, a Georeference Annotation can be added to a WarpedMapLayer using the addGeoreferenceAnnotation and addGeoreferenceAnnotationByUrl functions:

fetch(annotationUrl)
  .then((response) => response.json())
  .then((annotation) => warpedMapLayer.addGeoreferenceAnnotation(annotation))

Or:

await warpedMapLayer.addGeoreferenceAnnotationByUrl(annotationUrl)

It’s also possible to create a WarpedMapList first and pass it to the layer on creation. This has the advantage of being able to compute properties of a WarpedMapList first, e.g. getting the bounds and passing it to the OpenLayers Map.

import OpenLayersMap from 'ol/Map'
import Tile from 'ol/layer/Tile'
import OSM from 'ol/source/OSM'

import { WarpedMapLayer } from '@allmaps/openlayers'
import { WarpedMapList } from '@allmaps/render'
import { WebGL2WarpedMap } from '@allmaps/render/webgl2'

const annotationUrl =
  'https://annotations.allmaps.org/manifests/8f9faeba73d67031'
const annotation = await fetch(annotationUrl).then((response) =>
    response.json()
  )
const warpedMapList = new WarpedMapList<WebGL2WarpedMap>()
await warpedMapList.addGeoreferenceAnnotation(annotation)
const bbox = warpedMapList.getMapsBbox({ projection: { definition: 'EPSG:3857' } })

const map = new OpenLayersMap({
  target: 'map',
  layers: [
    new Tile({
      source: new OSM()
    })
  ],
  view: new View().fit(bbox, {
  padding: [20, 20, 20, 20]
  })
})

const warpedMapLayer = new WarpedMapLayer({ warpedMapList })
map.addLayer(warpedMapLayer)

Note that the ...ByUrl() functions are not available on a WarpedMapList.

WarpedMapLayer API, Options and Events

See the @allmaps/warpedmaplayer package for the API documentation of the methods coming from the WarpedMapLayer class (shared by all Allmaps plugins). It describes the methods like addGeoreferenceAnnotation() and includes a list of all options that can be set on instances of the class and all events which are passed to the native map instance hosting the layer instance.

You can set options on the entire layer, or on a specific map on the layer (overwriting layer options):

warpedMapLayer.setLayerOptions({ visible: true })
warpedMapLayer.setMapOptions(mapId, { visible: true })

You can listen to events in the typical way:

map.on('warpedmapadded', (event) => {
  console.log(event.mapIds)
})

Viewport projections

Allmaps supports two types of map projections as documented in @allmaps/project: internal projections and viewport projections. OpenLayers supports custom view projections, too. The Allmaps OpenLayers plugin can read the projection of the view of an OpenLayers map and apply it.

To set a custom projection to an OpenLayers map and have Allmaps pick it up, use the register function as foreseen in OpenLayers. (This works because the plugin loads Proj4 as a peer dependency.)

Optionally, also register your custom projections with the warpedMapLayer. This allows using the projection objects (including properties like id and name) through-out Allmaps. If omitted, the plugin will create new projection object containing only the definition.

import proj4 from 'proj4'

//... other imports

// const map = ...
// const warpedMapLayer = ...

const myProjection = {
  id: 'EPSG:28992',
  name: 'RD new',
  definition:
    '+proj=sterea +lat_0=52.1561605555556 +lon_0=5.38763888888889 +k=0.9999079 +x_0=155000 +y_0=463000 +ellps=bessel +towgs84=565.4171,50.3319,465.5524,1.9342,-1.6677,9.1019,4.0725 +units=m +no_defs +type=crs'
}

proj4.defs(myProjection.id, projection.definition)
register(proj4)

// Optional
warpedMapLayer.registerProjections([myProjection])

Then, create a new view with that projection and set the bbox, computed using the current projection:

const bbox = warpedMapLayer.getBbox({ projection: myProjection })
if (bbox) {
  map.setView(
    new View({
      projection: myProjection.id
    })
  )
  map.getView().fit(bbox)
}

License

MIT

API

`new OLWarpedMapEvent(type, data)`

Parameters

type (string)
data (unknown)

Returns

OLWarpedMapEvent.

Extends

Event

`OLWarpedMapEvent#data`

Type

unknown

`OpenLayersWarpedMapLayerOptions`

Type

object & Partial<WebGL2RenderOptions>

`new WarpedMapLayer(options)`

Creates a WarpedMapLayer instance

Parameters

options? (Partial<OpenLayersWarpedMapLayerOptions> | undefined)
- the WebGL2 renderer options

Returns

WarpedMapLayer.

Extends

Layer
BaseWarpedMapLayer

`WarpedMapLayer#addEventListeners()`

Parameters

There are no parameters.

Returns

void.

`WarpedMapLayer#addGeoreferenceAnnotation(annotation, mapOptions)`

Adds a Georeference Annotation

Parameters

annotation (unknown)
- Georeference Annotation
mapOptions? (Partial<WebGL2WarpedMapOptions> | undefined)
- Map options

Returns

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

`WarpedMapLayer#addGeoreferenceAnnotationByUrl(annotationUrl, mapOptions)`

Adds a Georeference Annotation by URL

Parameters

annotationUrl (string)
- URL of a Georeference Annotation
mapOptions? (Partial<WebGL2WarpedMapOptions> | undefined)
- Map options

Returns

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

`WarpedMapLayer#addGeoreferencedMap(georeferencedMap, mapOptions)`

Adds a Georeferenced Map

Parameters

georeferencedMap (unknown)
- Georeferenced Map
mapOptions? (Partial<WebGL2WarpedMapOptions> | undefined)
- Map options

Returns

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

`WarpedMapLayer#addImageInfos(imageInfos)`

Adds image information to the WarpedMapList’s image information cache

Parameters

imageInfos (Array<unknown>)
- Image informations

Returns

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

`WarpedMapLayer#addSprites(sprites, imageUrl, imageSize)`

Adds sprites to the Renderer’s sprite tile cache

This adds tiles from sprites to warped maps in WarpedMapList. Load maps before running this function. This uses the image info of related maps. When using addImageInfos(), call it before calling this function.

Parameters

sprites (Array<Sprite>)
- Sprites
imageUrl (string)
- Image url
imageSize ([number, number])
- Image size

Returns

Promise<void>.

`WarpedMapLayer#bringMapsForward(mapIds)`

Bring maps forward

Parameters

mapIds (Iterable<string>)
- IDs of the maps

Returns

void.

`WarpedMapLayer#bringMapsToFront(mapIds)`

Bring maps to front

Parameters

mapIds (Iterable<string>)
- IDs of the maps

Returns

void.

`WarpedMapLayer#canvas`

Type

HTMLCanvasElement

`WarpedMapLayer#canvasSize`

Type

[number, number]

`WarpedMapLayer#clear()`

Removes all warped maps from the layer

Parameters

There are no parameters.

Returns

void.

`WarpedMapLayer#container`

Type

HTMLDivElement

`WarpedMapLayer#contextLost(event)`

Parameters

event (Event)

Returns

void.

`WarpedMapLayer#contextRestored(event)`

Parameters

event (Event)

Returns

void.

`WarpedMapLayer#defaultSpecificWarpedMapLayerOptions`

Type

object

`WarpedMapLayer#dispose()`

Disposes all WebGL resources and cached tiles

Parameters

There are no parameters.

Returns

void.

`WarpedMapLayer#getBbox(projectionOptions)`

Get the bounding box of all maps in the layer

The result is returned in lon-lat EPSG:4326 by default.

Note: more selection options are available on this function of WarpedMapList

Parameters

projectionOptions? (Partial<ProjectionOptions> | undefined)

Returns

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

`WarpedMapLayer#getCenter(projectionOptions)`

Get the center of the bounding box of all maps in the layer

The result is returned in lon-lat EPSG:4326 by default.

Note: more selection options are available on this function of WarpedMapList

Parameters

projectionOptions? (Partial<ProjectionOptions> | undefined)

Returns

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

`WarpedMapLayer#getConvexHull(projectionOptions)`

Get the convex hull of all maps in the layer

The result is returned in lon-lat EPSG:4326 by default.

Note: more selection options are available on this function of WarpedMapList

Parameters

projectionOptions? (Partial<ProjectionOptions> | undefined)

Returns

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

`WarpedMapLayer#getDefaultOptions()`

Get the default options the layer

Parameters

There are no parameters.

Returns

object & SpecificBaseRenderOptions<WebGL2WarpedMap> & Partial<WarpedMapListOptions<WebGL2WarpedMap>> & SpecificWebGL2WarpedMapOptions & SpecificTriangulatedWarpedMapOptions & WarpedMapOptions.

`WarpedMapLayer#getLayerOptions()`

Get the layer options

Parameters

There are no parameters.

Returns

{ warpedMapFactory?: WarpedMapFactory<WebGL2WarpedMap> | undefined; warpedMapList?: WarpedMapList<WebGL2WarpedMap> | undefined; ... 65 more ...; distortionMeasure?: DistortionMeasure | undefined; }.

`WarpedMapLayer#getLonLatExtent()`

Return the bounding box of all visible maps in the layer (inside or outside of the Viewport), in longitude/latitude coordinates.

Parameters

There are no parameters.

Returns

Extent | undefined.

Bounding box of all warped maps

`WarpedMapLayer#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

WebGL2WarpedMapOptions | undefined.

`WarpedMapLayer#getMapIds()`

Get mapIds for all maps in the layer

Note: more selection options are available on this function of WarpedMapList

Parameters

There are no parameters.

Returns

The mapIds of all maps (Array<string>).

`WarpedMapLayer#getMapMapOptions(mapId)`

Get the map-specific options of a map

Parameters

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

Returns

Partial<WebGL2WarpedMapOptions> | undefined.

`WarpedMapLayer#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

WebGL2WarpedMapOptions | undefined.

`WarpedMapLayer#getMapZIndex(mapId)`

Get the z-index of a map

Parameters

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

Returns

The z-index of a map (number | undefined).

`WarpedMapLayer#getMapsBbox(mapIds, projectionOptions)`

Get the bounding box of all selected maps

The result is returned in lon-lat EPSG:4326 by default.

Note: more selection options are available on this function of WarpedMapList

Parameters

mapIds (Array<string>)
- Map IDs
projectionOptions? (Partial<ProjectionOptions> | undefined)

Returns

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

`WarpedMapLayer#getMapsCenter(mapIds, projectionOptions)`

Get the center of the bounding box of all selected maps

The result is returned in lon-lat EPSG:4326 by default.

Note: more selection options are available on this function of WarpedMapList

Parameters

mapIds (Array<string>)
- Map IDs
projectionOptions? (Partial<ProjectionOptions> | undefined)

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).

`WarpedMapLayer#getMapsConvexHull(mapIds, projectionOptions)`

Get the convex hull of all selected maps maps

The result is returned in lon-lat EPSG:4326 by default.

Note: more selection options are available on this function of WarpedMapList

Parameters

mapIds (Array<string>)
- Map IDs
projectionOptions? (Partial<ProjectionOptions> | undefined)

Returns

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

`WarpedMapLayer#getOpacity()`

Get the layer opacity

Returns a number between 0 and 1 (the default)

Parameters

There are no parameters.

Returns

number.

`WarpedMapLayer#getWarpedMap(mapId)`

Get the WarpedMap instance for a map

Parameters

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

Returns

WebGL2WarpedMap | undefined.

`WarpedMapLayer#getWarpedMapList()`

Get the WarpedMapList object that contains a list of the warped maps of all loaded maps

Parameters

There are no parameters.

Returns

WarpedMapList<WebGL2WarpedMap>.

`WarpedMapLayer#getWarpedMaps(mapIds)`

Get the WarpedMap instances for all maps, or all selected maps

If no argument is passed, the WarpedMap instance of all maps in the layer is passed

Note: more selection options are available on this function of WarpedMapList

Parameters

mapIds? (Array<string> | undefined)
- Map IDs

Returns

The WarpedMap instance of all (selected) map (Array<WebGL2WarpedMap>).

`WarpedMapLayer#gl?`

Type

WebGL2RenderingContext

`WarpedMapLayer#nativePassWarpedMapEvent(event)`

Parameters

event (Event)

Returns

void.

`WarpedMapLayer#nativeUpdate()`

Parameters

There are no parameters.

Returns

void.

`WarpedMapLayer#options`

Type

object & Partial<WebGL2RenderOptions>

`WarpedMapLayer#registerProjections(projections)`

Keep a list of registered projections.

Can optionally be used to complement OpenLayer’s register(proj4) function.

To use viewport projections in OpenLayers, add projections to proj4 and register proj4 (Example: https://openlayers.org/en/latest/examples/scaleline-indiana-east.html). WarpedMapLayer reads the view’s projections code, gets its definition from proj4.defs (thanks to the register() function) and constructs a new Projection type (defined in

Parameters

projections (Array<Projection>)

Returns

void.

`WarpedMapLayer#registeredProjections`

Type

Map<string, Projection>

`WarpedMapLayer#removeEventListeners()`

Parameters

There are no parameters.

Returns

void.

`WarpedMapLayer#removeGeoreferenceAnnotation(annotation)`

Removes a Georeference Annotation

Parameters

annotation (unknown)
- Georeference Annotation

Returns

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

`WarpedMapLayer#removeGeoreferenceAnnotationByUrl(annotationUrl)`

Removes a Georeference Annotation by URL

Parameters

annotationUrl (string)
- URL of a Georeference Annotation

Returns

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

`WarpedMapLayer#removeGeoreferencedMap(georeferencedMap)`

Removes a Georeferenced Map

Parameters

georeferencedMap (unknown)
- Georeferenced Map

Returns

Map ID of the map that was removed (string).

`WarpedMapLayer#removeGeoreferencedMapById(mapId)`

Removes a Georeferenced Map by its ID

Parameters

mapId (string)
- Map ID of the georeferenced map to remove

Returns

Map ID of the map that was removed (string).

`WarpedMapLayer#render(frameState)`

Render the layer.

Parameters

frameState ({ pixelRatio: number; time: number; viewState: State; animate: boolean; coordinateToPixelTransform: Transform; ... 14 more ...; renderTargets: { [x: string]: boolean; }; })
- OpenLayers frame state

Returns

The rendered element (HTMLElement).

`WarpedMapLayer#renderer`

Type

WebGL2Renderer

`WarpedMapLayer#resetLayerOptions(layerOptionKeys, animationOptions)`

Reset the layer options

An empty array resets all options, undefined resets no options. Doesn’t reset render options or specific warped map layer options

Parameters

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

Returns

void.

`WarpedMapLayer#resetMapsOptions(mapIds, mapOptionKeys, layerOptionKeys, animationOptions)`

Reset the map-specific options of maps (and the layer options)

An empty array resets all options, undefined resets no options. Doesn’t reset render options or specific warped map layer 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
layerOptionKeys? (Array<string> | undefined)
- Keys of the layer options to reset
animationOptions? (Partial<AnimationOptions> | undefined)
- Animation options

Returns

void.

`WarpedMapLayer#resetMapsOptionsByMapId(mapOptionkeysByMapId, layerOptionKeys, animationOptions)`

Reset the map-specific options of maps by map ID (and the layer options)

An empty array or map resets all options (for all maps), undefined resets no options. Doesn’t reset render options or specific warped map layer options

Parameters

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

Returns

void.

`WarpedMapLayer#resizeCanvas(canvas, __1)`

Parameters

canvas (HTMLCanvasElement)
undefined ([number, number])

Returns

boolean.

`WarpedMapLayer#resized(entries)`

Parameters

entries (Array<ResizeObserverEntry>)

Returns

void.

`WarpedMapLayer#sendMapsBackward(mapIds)`

Send maps backward

Parameters

mapIds (Iterable<string>)
- IDs of the maps

Returns

void.

`WarpedMapLayer#sendMapsToBack(mapIds)`

Send maps to back

Parameters

mapIds (Array<string>)
- IDs of the maps

Returns

void.

`WarpedMapLayer#setLayerOptions(layerOptions, animationOptions)`

Set the layer options

Parameters

layerOptions (object | Partial<WebGL2RenderOptions>)
- Layer options to set
animationOptions? (Partial<AnimationOptions> | undefined)
- Animation options

Returns

void.

Examples

warpedMapLayer.setLayerOptions({ transformationType: 'thinPlateSpline' })

`WarpedMapLayer#setLayerTransformationType(transformationType, animationOptions)`

Set the transformation type of the layer

Parameters

transformationType? (TransformationType | undefined)
- Transformation type to set
animationOptions? (Partial<AnimationOptions> | undefined)
- Animation options

Returns

void.

`WarpedMapLayer#setMapGcps(mapId, gcps, animationOptions)`

Set the GCPs of a map

This only sets the map-specific gcps option of the map (or more specifically of the warped map used for rendering), overwriting the original GCPs inferred from the Georeference Annotation.

The original GCPs can be reset by resetting the map-specific GCPs option, and stay accessible in the warped map’s map property.

Parameters

mapId (string)
- Map ID for which to set the options
gcps (Array<Gcp>)
- GCPs to set
animationOptions? (Partial<AnimationOptions> | undefined)
- Animation options

Returns

void.

`WarpedMapLayer#setMapOptions(mapId, mapOptions, layerOptions, animationOptions)`

Set the map-specific options of a map (and the layer options)

In general setting a map-specific option also sets the corresponding option of the map, since these are the result of merging the default, georeferenced map, layer and map-specific options of that map.

A special case is setting a map-specific option to undefined: then the corresponding option is derived from the default, georeferenced map or layer option. This is equivalent to using the reset function for map-specific option.

Parameters

mapId (string)
- Map ID for which to set the options
mapOptions ({ renderMaps?: boolean | undefined; renderLines?: boolean | undefined; renderPoints?: boolean | undefined; renderGcps?: boolean | undefined; renderGcpsColor?: string | undefined; renderGcpsSize?: number | undefined; renderGcpsBorderColor?: string | undefined; ... 55 more ...; distortionMeasure?: DistortionMeasure | ...)
- Map-specific options to set
layerOptions? (object | Partial<WebGL2RenderOptions> | undefined)
- Layer options to set
animationOptions? (Partial<AnimationOptions> | undefined)
- Animation options

Returns

void.

Examples

warpedMapLayer.setMapOptions(myMapId, { transformationType: 'thinPlateSpline' })

`WarpedMapLayer#setMapResourceMask(mapId, resourceMask, animationOptions)`

Set the resource mask of a map

This only sets the map-specific resourceMask option of the map (or more specifically of the warped map used for rendering), overwriting the original resource mask inferred from the Georeference Annotation.

The original resource mask can be reset by resetting the map-specific resource mask option, and stays accessible in the warped map’s map property.

Parameters

mapId (string)
- Map ID for which to set the options
resourceMask (Array<Point>)
- Resource mask to set
animationOptions? (Partial<AnimationOptions> | undefined)
- Animation options

Returns

void.

`WarpedMapLayer#setMapTransformationType(mapId, transformationType, animationOptions)`

Set the transformation type of a map

This only sets the map-specific transformationType option of the map (or more specifically of the warped map used for rendering), overwriting the original transformation type inferred from the Georeference Annotation.

The original transformation type can be reset by resetting the map-specific transformation type option, and stays accessible in the warped map’s map property.

Parameters

mapId (string)
- Map ID for which to set the options
transformationType? (TransformationType | undefined)
- Transformation type to set
animationOptions? (Partial<AnimationOptions> | undefined)
- Animation options

Returns

void.

`WarpedMapLayer#setMapsOptions(mapIds, mapOptions, layerOptions, animationOptions)`

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

Parameters

mapIds (Array<string>)
- Map IDs for which to set the options
mapOptions ({ renderMaps?: boolean | undefined; renderLines?: boolean | undefined; renderPoints?: boolean | undefined; renderGcps?: boolean | undefined; renderGcpsColor?: string | undefined; renderGcpsSize?: number | undefined; renderGcpsBorderColor?: string | undefined; ... 55 more ...; distortionMeasure?: DistortionMeasure | ...)
- Map-specific options to set
layerOptions? (object | Partial<WebGL2RenderOptions> | undefined)
- Layer options to set
animationOptions? (Partial<AnimationOptions> | undefined)
- Animation options

Returns

void.

Examples

warpedMapLayer.setMapsOptions([myMapId], { transformationType: 'thinPlateSpline' })

`WarpedMapLayer#setMapsOptionsByMapId(mapOptionsByMapId, layerOptions, animationOptions)`

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

Parameters

mapOptionsByMapId (Map<string, Partial<WebGL2WarpedMapOptions>>)
- Map-specific options to set by map ID
layerOptions? (object | Partial<WebGL2RenderOptions> | undefined)
- Layer options to set
animationOptions? (Partial<AnimationOptions> | undefined)
- Animation options

Returns

void.

`WarpedMapLayer#setMapsTransformationType(mapIds, transformationType, animationOptions)`

Set the transformation type of maps

The original transformation type can be reset by resetting the map-specific transformation type option, and stays accessible in the warped map’s map property.

Parameters

mapIds (Array<string>)
- Map IDs for which to set the options
transformationType? (TransformationType | undefined)
- Transformation type to set
animationOptions? (Partial<AnimationOptions> | undefined)
- Animation options

Returns

void.

`WarpedMapLayer#setOpacity(opacity)`

Set the layer opacity

Parameters

opacity (number)
- Layer opacity to set

Returns

void.