Returns the area of the geometry parameter passed in.
If the geometry is a point or a line, the result is 0. If the geometry is a complex geometry, the result is the sum of the areas of each simple area in the complex geometry.
Parameter 1 - any geometry.
Returns: the area of the geometry as a real number in the range between 0 and infinity, in dataset units.
Note: This function does not currently fully support 3D geometries. Any 3D geometries will be projected down to 2 dimensions.