refactoring: avoid unnecessary object creation
refactoring: avoid unnecessary object creation

MultiPolygon already is a GEOSGeometry

geometalab/drf-utm-zone-info,geometalab/osmaxx,geometalab/osmaxx-frontend,geometalab/osmaxx-frontend,geometalab/osmaxx,geometalab/osmaxx,geometalab/osmaxx-frontend,geometalab/osmaxx,geometalab/drf-utm-zone-info,geometalab/osmaxx-frontend