Streets and Highways Streets and highways for Illinois as of 1993. Streams and Shorelines Streams and shorelines for Illinois. Each arc carries attributes describing stream character. Township Lines Township and range lines in Illinois. These data were extracted from the primary public land survey data set in the ISGS GIS database.
Attribute data identify township and range.
Electrical Transmission Lines and Pipelines Major electrical transmission lines and pipelines for Illinois. Wells and Borings Locations, well type and identification for over 370,000 wells and borings in Illinois. Data are also available for entire state as of December, 1995. Data comes from driller's logs, engineering boring logs, etc. Illinois Wetlands Inventory - Lines Wetlands and deepwater habitats of Illinois in the 1980's based on US Fish and Wildlife Service definitions.