GEOL 380: Hydrogeology (Information Sources in Hydrology): Aerial Photographs & Satellite Imagery

This site provides links to a wide variety of geospatial data available from the Illinois Geospatial Data Clearinghouse.

A digital collection of aerial photography for Illinois. This site includes historical and current aerial photography as well as digital Orthophotoquadrangles and other GIS data for Illinois. It also provides access to digital topographic maps for Illinois.

A digital collection of historical aerial photography for Illinois.

Digital orthophotos and other imagery for Illinois from the National Aerial Photography Program (NAPP), taken between 1998 and 2001. Orthophotos are aerial photographs that have been corrected for errors caused by changes in elevation or angle of the camera taking the photograph.

A site with reference data for Illinois, including Digital Raster Graphics (DRGs), which are digital versions of topographic maps for Illinois that can be downloaded from this site for use in GIS.

Earth Explorer can be used to find current and historical aerial photographs for a location. Users can enter an address or place name to find aerial photographs taken by various federal agencies over time.

A special collection of images and image collections from the EROS (Earth Resources Observation and Science) Data Center. This site includes images from collection that can be downloaded, including Earth as Art and Voyage of Lewis and Clark.