Presented in this work is a visualization in 3D of building interiors. Fields such asfacility management is of interest for this concept. Data that is to be visualized has,unlike most previous GIS, access to the third dimension to describe floors of abuilding in a realistic manner. Tests to determine strengths and weaknesses of 3Dconcepts compared to widely known 2D concepts is being performed. Factors toconsider in visualization theory is taken into context to combine visualization andGIS. The results is expected to have positive effects for users interested in facilitymanagement.