ABSTRACT: Indoor GIS is gaining a lot of interest due to the great value that can be gained by applying the power of GIS to indoor problems. There are a number of factors that make developing and managing an indoor GIS a bit different than your typical outdoor GIS. We will discuss lessons learned about modeling and managing information about the indoor environment gathered through years of experience. We will compare and contrast some of the more prevalent information models and best practices for getting started with your indoor GIS. You should come away with an appreciation of some of the success factors involved and a basic roadmap for how to get started.