Donut Polygons in QGIS, ArcMap, ArcGIS Pro and geoJSON
Donut Polygons were the nightmare in first GIS courses. At the very moment I can’t remember why but the concept of an inner and an outer part makes…
Mapshaper by mbloch is one of my favourite “swiss army knife”-tools if you need fast data reduction and topology first aid in polygon data handling. There a two…