Situational awareness is critical for the preparation of defense missions, and 2D analysis is no longer sufficient. Using modern techniques such as dense matching and automated building recognition, it is possible to create accurate 3D environments of the mission area, and subsequently conduct 3D analysis - such as visibility studies - on this environment,. The combination of photogrammetric and GIS techniques available in Hexagon's software suite allows us to do this semi-automatically. In this session, we will demonstrate the workflow and some of the possibilities. Using stereo imagery we will explain how an accurate 3D environment in an urban setting can be built, analysed in GeoMedia 3D and served with Geospatial Portal.