Returns the length of the perimeter of the polygonal parts of the geometry of a given feature. The perimeter of multi geometries is the sum of the perimeters of their components.

Feature.perimeter(maxError, proj)Float
this: featureElement

The feature from which the geometry is taken.

maxErrorErrorMargin, default: null

The maximum amount of error tolerated when performing any necessary reprojection.

projProjection, default: null

If specified, the result will be in the units of the coordinate system of this projection. Otherwise it will be in meters.