A Geographic Information System (GIS) is an important planning tool that provides benefits to COMPASS, its member agencies, and others by supporting state, regional, county, and local planning and technical efforts. Nearly all projects incorporate GIS technology, whether it is for data collection and storage, or analysis and presentation. GIS allows planners to view and query spatial data, perform advanced analysis to discover relationships, patterns, and trends, and effectively present information to decision-makers and the public.