GeoJSONSource

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>

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>

Source

src/source/geojson_source.ts:325

getClusterChildren()

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

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<Geometry, object>[]>

a promise that is resolved when the features are retrieved

Source

src/source/geojson_source.ts:280

getClusterExpansionZoom()

getClusterExpansionZoom(clusterId: number): Promise<number>

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

Source

src/source/geojson_source.ts:270

getClusterLeaves()

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

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<Geometry, object>[]>

a promise that is resolved when the features are retreived

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);
});

Source

src/source/geojson_source.ts:309

getData()

getData(): Promise<GeoJSON>

Allows to get the source's actual GeoJSON data.

Returns

Promise<GeoJSON>

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

Source

src/source/geojson_source.ts:240

listens()

listens(type: string): boolean

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

Source

src/util/evented.ts:161

off()

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

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.

on()

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

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

this

Inherited from

Evented.on

Source

src/util/evented.ts:73

once()

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

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

Source

src/util/evented.ts:102

setClusterOptions()

setClusterOptions(options: SetClusterOptions): this

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});

Source

src/source/geojson_source.ts:254

setData()

setData(data: string | GeoJSON): this

Sets the GeoJSON data and re-renders the map.

Parameters

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

Returns

this

Source

src/source/geojson_source.ts:208

setEventedParent()

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

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

Source

src/util/evented.ts:172

updateData()

updateData(diff: GeoJSONSourceDiff): this

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.

Parameters

Parameter	Type	Description
`diff`	`GeoJSONSourceDiff`	The changes that need to be applied.

Returns

this

Source

src/source/geojson_source.ts:229