Planning - GIS       - What is GIS?       Planning - GIS           What is GIS? GIS is an acronym that stands for Geographic Information Systems.  By entering different types of information that have a geographic location (i.e. roads, zoning districts, fire hydrants, aerial photography, topography, etc.) into a computer, one can then choose to overlay a variety of that information to see their relationship. Maps can then be made with better information leading to better decision-making.