A coverage model is generated to forecast network coverage robustness for vertically layered 3-dimensional sections of airspace above an area. Network configuration data for multiple base stations of a wireless communication network located in an area are received. Environmental data that includes information on natural and manmade features in the area are received. The airspace above the area into a plurality of vertically layered 3-dimensional sections is segregated. A coverage model is generated based at least on the network configuration data and the environmental data for predicting network coverage of the wireless communication network in the 3-dimensional sections in the airspace above the area.