Attempt to show error when rgeo chokes on overlapping polygons (closes #1319)
Attempt to show error when rgeo chokes on overlapping polygons (closes #1319)

calonso-conabio/inaturalist,pleary/inaturalist,inaturalist/inaturalist,pleary/inaturalist,calonso-conabio/inaturalist,pleary/inaturalist,pleary/inaturalist,calonso-conabio/inaturalist,inaturalist/inaturalist,inaturalist/inaturalist,inaturalist/inaturalist,calonso-conabio/inaturalist,inaturalist/inaturalist,calonso-conabio/inaturalist,pleary/inaturalist