Returns the area of the feature's default geometry. Area of points and line strings is 0, and the area of multi geometries is the sum of the areas of their components (intersecting areas are counted multiple times).
The feature from which the geometry is taken.
ErrorMargin, default: null
The maximum amount of error tolerated when performing any necessary reprojection.
Projection, default: null
If specified, the result will be in the units of the coordinate system of this projection. Otherwise it will be in square meters.