Function applySpatial

applySpatial(layerId, filterGeometry): string
JMap.Map.Filter.applySpatial

Render only layer's features that intersect the filterGeometry area.

Only one spatial filter can be set for a specific layer at the same time.
Parameters
- layerId: JId
  The JMap layer id
- filterGeometry: JCircle | JPolygon
  The geometry that is the area to search. Can be a circle or a polygon.
Returns string
The filter id. By example for layer 4 => "spatial-4"
Throws
Error if layer is not found, or filterGeometry format is not good

Example
```
// Will render features that intersect the circle of radius 500 (in km) centered at location x=20 and y=10.
JMap.Map.Filter.applySpatial(4, { radius: 500, center: { x: 20, y: 10 }})

// Will render features that intersect the polygon (in this case a square)
JMap.Map.Filter.applySpatial(4, [ [ 20.44, 10.32 ], [ 20.44, 78.44 ], [ 40.56, 78.44 ], [ 40.56, 10.32 ], [ 20.44, 10.32 ] ])
```