GeoJSONSource

Defined in: src/source/geojson_source.ts:109

A source containing GeoJSON. (See the Style Specification for detailed documentation of options.)

Examples

map.addSource('some id', {
    type: 'geojson',
    data: 'https://d2ad6b4ur7yvpq.cloudfront.net/naturalearth-3.3.0/ne_10m_ports.geojson'
});

map.addSource('some id', {
   type: 'geojson',
   data: {
       "type": "FeatureCollection",
       "features": [{
           "type": "Feature",
           "properties": {},
           "geometry": {
               "type": "Point",
               "coordinates": [
                   -76.53063297271729,
                   39.18174077994108
               ]
           }
       }]
   }
});

map.getSource('some id').setData({
  "type": "FeatureCollection",
  "features": [{
      "type": "Feature",
      "properties": { "name": "Null Island" },
      "geometry": {
          "type": "Point",
          "coordinates": [ 0, 0 ]
      }
  }]
});

See

Extends

Evented

Implements

Source

Methods

_updateWorkerData()

_updateWorkerData(diff?: GeoJSONSourceDiff): Promise<void>

Defined in: src/source/geojson_source.ts:332

Responsible for invoking WorkerSource's geojson.loadData target, which handles loading the geojson data and preparing to serve it up as tiles, using geojson-vt or supercluster as appropriate.

Parameters

Parameter	Type	Description
`diff`?	`GeoJSONSourceDiff`	the diff object

Returns

Promise<void>

abortTile()

abortTile(tile: Tile): Promise<void>

Defined in: src/source/geojson_source.ts:407

Allows to abort a tile loading.

Parameters

Parameter	Type	Description
`tile`	`Tile`	The tile to abort

Returns

Promise<void>

Implementation of

Source.abortTile

getClusterChildren()

getClusterChildren(clusterId: number): Promise<Feature[]>

Defined in: src/source/geojson_source.ts:287

For clustered sources, fetches the children of the given cluster on the next zoom level (as an array of GeoJSON features).

Parameters

Parameter	Type	Description
`clusterId`	`number`	The value of the cluster's `cluster_id` property.

Returns

Promise<Feature[]>

a promise that is resolved when the features are retrieved

getClusterExpansionZoom()

getClusterExpansionZoom(clusterId: number): Promise<number>

Defined in: src/source/geojson_source.ts:277

For clustered sources, fetches the zoom at which the given cluster expands.

Parameters

Parameter	Type	Description
`clusterId`	`number`	The value of the cluster's `cluster_id` property.

Returns

Promise<number>

a promise that is resolved with the zoom number

getClusterLeaves()

getClusterLeaves(clusterId: number, limit: number, offset: number): Promise<Feature[]>

Defined in: src/source/geojson_source.ts:316

For clustered sources, fetches the original points that belong to the cluster (as an array of GeoJSON features).

Parameters

Parameter	Type	Description
`clusterId`	`number`	The value of the cluster's `cluster_id` property.
`limit`	`number`	The maximum number of features to return.
`offset`	`number`	The number of features to skip (e.g. for pagination).

Returns

Promise<Feature[]>

a promise that is resolved when the features are retrieved

Example

Retrieve cluster leaves on click

map.on('click', 'clusters', (e) => {
  let features = map.queryRenderedFeatures(e.point, {
    layers: ['clusters']
  });

  let clusterId = features[0].properties.cluster_id;
  let pointCount = features[0].properties.point_count;
  let clusterSource = map.getSource('clusters');

  const features = await clusterSource.getClusterLeaves(clusterId, pointCount);
  // Print cluster leaves in the console
  console.log('Cluster leaves:', features);
});

getData()

getData(): Promise<GeoJSON<Geometry, {}>>

Defined in: src/source/geojson_source.ts:247

Allows to get the source's actual GeoJSON data.

Returns

Promise<GeoJSON<Geometry, {}>>

a promise which resolves to the source's actual GeoJSON data

hasTransition()

hasTransition(): boolean

Defined in: src/source/geojson_source.ts:432

True if the source has transition, false otherwise.

Returns

boolean

Implementation of

Source.hasTransition

listens()

listens(type: string): boolean

Defined in: src/util/evented.ts:165

Returns a true if this instance of Evented or any forwardeed instances of Evented have a listener for the specified type.

Parameters

Parameter	Type	Description
`type`	`string`	The event type

Returns

boolean

true if there is at least one registered listener for specified event type, false otherwise

Inherited from

Evented.listens

loaded()

loaded(): boolean

Defined in: src/source/geojson_source.ts:376

True if the source is loaded, false otherwise.

Returns

boolean

Implementation of

Source.loaded

loadTile()

loadTile(tile: Tile): Promise<void>

Defined in: src/source/geojson_source.ts:380

This method does the heavy lifting of loading a tile. In most cases it will defer the work to the relevant worker source.

Parameters

Parameter	Type	Description
`tile`	`Tile`	The tile to load

Returns

Promise<void>

Implementation of

Source.loadTile

off()

off(type: string, listener: Listener): GeoJSONSource

Defined in: src/util/evented.ts:90

Removes a previously registered event listener.

Parameters

Parameter	Type	Description
`type`	`string`	The event type to remove listeners for.
`listener`	`Listener`	The listener function to remove.

Returns

GeoJSONSource

Inherited from

Evented.off

on()

on(type: string, listener: Listener): Subscription

Defined in: src/util/evented.ts:73

Adds a listener to a specified event type.

Parameters

Parameter	Type	Description
`type`	`string`	The event type to add a listen for.
`listener`	`Listener`	The function to be called when the event is fired. The listener function is called with the data object passed to `fire`, extended with `target` and `type` properties.

Returns

Subscription

Inherited from

Evented.on

onAdd()

onAdd(map: Map): void

Defined in: src/source/geojson_source.ts:205

This method is called when the source is added to the map.

Parameters

Parameter	Type	Description
`map`	`Map`	The map instance

Returns

void

Implementation of

Source.onAdd

once()

once(type: string, listener?: Listener): Promise<any> | GeoJSONSource

Defined in: src/util/evented.ts:106

Adds a listener that will be called only once to a specified event type.

The listener will be called first time the event fires after the listener is registered.

Parameters

Parameter	Type	Description
`type`	`string`	The event type to listen for.
`listener`?	`Listener`	The function to be called when the event is fired the first time.

Returns

Promise<any> | GeoJSONSource

this or a promise if a listener is not provided

Inherited from

Evented.once

onRemove()

onRemove(): void

Defined in: src/source/geojson_source.ts:420

This method is called when the source is removed from the map.

Returns

void

Implementation of

Source.onRemove

serialize()

serialize(): GeoJSONSourceSpecification

Defined in: src/source/geojson_source.ts:425

Returns

GeoJSONSourceSpecification

A plain (stringifiable) JS object representing the current state of the source. Creating a source using the returned object as the options should result in a Source that is equivalent to this one.

Implementation of

Source.serialize

setClusterOptions()

setClusterOptions(options: SetClusterOptions): this

Defined in: src/source/geojson_source.ts:261

To disable/enable clustering on the source options

Parameters

Parameter	Type	Description
`options`	`SetClusterOptions`	The options to set

Returns

this

Example

map.getSource('some id').setClusterOptions({cluster: false});
map.getSource('some id').setClusterOptions({cluster: false, clusterRadius: 50, clusterMaxZoom: 14});

setData()

setData(data: string | GeoJSON<Geometry, {}>): this

Defined in: src/source/geojson_source.ts:215

Sets the GeoJSON data and re-renders the map.

Parameters

Parameter	Type	Description
`data`	`string` \| `GeoJSON`<`Geometry`, {}>	A GeoJSON data object or a URL to one. The latter is preferable in the case of large GeoJSON files.

Returns

this

setEventedParent()

setEventedParent(parent?: Evented, data?: any): GeoJSONSource

Defined in: src/util/evented.ts:176

Bubble all events fired by this instance of Evented to this parent instance of Evented.

Parameters

Parameter	Type
`parent`?	`Evented`
`data`?	`any`

Returns

GeoJSONSource

Inherited from

Evented.setEventedParent

unloadTile()

unloadTile(tile: Tile): Promise<void>

Defined in: src/source/geojson_source.ts:415

Allows to unload a tile.

Parameters

Parameter	Type	Description
`tile`	`Tile`	The tile to unload

Returns

Promise<void>

Implementation of

Source.unloadTile

updateData()

updateData(diff: GeoJSONSourceDiff): this

Defined in: src/source/geojson_source.ts:236

Updates the source's GeoJSON, and re-renders the map.

For sources with lots of features, this method can be used to make updates more quickly.

This approach requires unique IDs for every feature in the source. The IDs can either be specified on the feature, or by using the promoteId option to specify which property should be used as the ID.

It is an error to call updateData on a source that did not have unique IDs for each of its features already.

Updates are applied on a best-effort basis, updating an ID that does not exist will not result in an error.