Add and calculate an area field for polygon sf objects

Add and calcualte an area field for polygon sf objects. Area is calcuated based on the linear unit of the assigned projection of the input sf object.

add_area_field(sf_obj, field_name)

Arguments

sf_obj	An polygon sf object
field_name	character. The name of the area field.

Value

Modified sf object

Author

Chris R. Vernon (chris.vernon@pnnl.gov)