IdentifyFeatures

Task for identifying features at a point across multiple map services with advanced tolerance and filtering options.

Constructor

new IdentifyFeatures(options: IdentifyOptions)

Argument	Type	Description
options	IdentifyOptions	Configuration options for the identify operation

Options

Option	Type	Default	Description
url	string		Required MapService URL
layers	Array<number> | string	'all'	Layers to identify
tolerance	number	3	Search tolerance in pixels
returnGeometry	boolean	false	Include feature geometry
maxAllowableOffset	number		Geometry simplification
geometryPrecision	number		Decimal places for geometry
dynamicLayers	Array<object>		Dynamic layer definitions
mapExtent	object		Current map extent
imageDisplay	object		Map image parameters
returnFieldName	boolean	false	Return field names with values
returnUnformattedValues	boolean	false	Return raw field values
token	string		Authentication token

Chainable Methods

All methods return the task instance for chaining:

task.tolerance(5).layers([0, 1]).returnGeometry(true)

Method	Description
layers(layers)	Set layers to identify
tolerance(pixels)	Set search tolerance
returnGeometry(boolean)	Include geometry in results
returnFieldName(boolean)	Include field names
token(token)	Set authentication token

Execution Methods

.at(point, map, callback?)

Identify features at a geographic point.

Parameters:

• point (LngLat) - Geographic coordinates
• map (Map) - MapLibre GL or Mapbox GL map instance
• callback (Function, optional) - Callback function for results

Returns: Promise<FeatureCollection>

.on(map)

Set the map instance for the identify operation.

Parameters:

• map (Map) - MapLibre GL or Mapbox GL map instance

Returns: IdentifyFeatures (for chaining)

.run()

Execute the identify operation with current parameters.

Returns: Promise<FeatureCollection>

console.log('Identified features:', results.features); });

## Advanced Usage Examples