Illinois Geospatial Data Clearinghouse
The Illinois Geospatial Data Clearinghouse is an established node of the National Spatial Data Infrastructure Clearinghouse Network. Hosted by the Illinois State Geological Survey since July 1, 1997, the Illinois Geospatial Data Clearinghouse has become the de facto starting point for the GIS and remote sensing user communities in Illinois.
Customers include a broad cross-section of organizations including state and federal agencies, regional groups, county and municipal governments, universities, K-12 teachers and students, and private sector businesses. In addition, hikers, fishermen, hunters, birding enthusiasts, and land trust preservationists download data from the Illinois Clearinghouse.