Keep original geometries of sf objects

When intersections occur, what was originally 2 polygons features can become LINESTRING and/or POINT and any COLLECTIONS or MULTI- versions of these. This function evaluates what the original geometry was and drops any newly created different geometries. For example, if a POLYGON becomes a COLLECTION of MULTIPOLYGON, POLYGON and POINT geometries, the POINT geometries will be dropped. This function is used internally in postProcessTo().

keepOrigGeom(newObj, origObj)

Arguments

newObj

The new, derived sf object

origObj

The previous, object whose geometries should be used.

Value

The original newObj, but with only the type of geometry that entered into the function.