I am looking to convert a CityGML file into a shapefile to perform some spatial analysis on it. I am completely new to the CityGML format and keep running into issues when trying to import them in either ArcMap or QGIS.
In QGIS (Version 2.18.2): I have tried to import the .gml via 'add vector layer'. The validity check states 'unknown geometry type 0'.
In ArcMap (Version 10.3.1): I tried both data interoperability tools > quick import and interoperability connections > add interoperability connection. I still end up with No Geometry.
Is there something wrong with the structure of the CityGML?