Digital Geography

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 total sense in the real world (house with a patio, lakes with islands, Rome with the Vatican City) yet the creation of those was never the covered in the basic “how to edit”-classes. So how can we create them with QGIS, ArcMap as well as ArcGIS Pro and geoJSON? In this tutorial I will cover this basic task.

ArcGIS 10.3

Yesterday the new major release of worldwide leading GIS solution ArcGIS was released: 10.3. Most users upgraded already to the version 10.x and enjoyed Python support as well as other enhancements. So what is to expect from this new version? 64 bit support, Twitter integration, free support? Let’s have a look!