CMAP maintains a database of observed land use in a form suitable for analysis using Geographic Information Systems (GIS). The Land Use Inventory is updated every five years and is used to support regional planning and policy evaluations as well as local technical planning assistance activities. CMAP has also established a procedure for evaluating potential Developments of Regional Importance. Since GO TO 2040 was adopted, CMAP has partnered with Chicago Wilderness to enhance our information on the core conservation lands in the region and how to link them together in a regional green infrastructure network. Revised data are now available, along with a set of GIS tools, for conservation partners in the region to help identify portions of the green infrastructure network on which they wish to concentrate their efforts.