isGeoLayerArea()

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isGeoLayerArea() function

Type guard for area layer.

Signature:

export declare function isGeoLayerArea(layer: IGeoLayer): layer is IGeoLayerArea;

Parameters

Parameter	Type	Description
layer	IGeoLayer	The layer to check

Returns:

layer is IGeoLayerArea

true if the layer is an area layer, false otherwise

Remarks

Use this function to narrow an IGeoLayer to IGeoLayerArea when you need to access area-specific properties like area.