Search Results
2004. National Atlas of the United States. This point shapefile includes Holocene volcanoes, which are those thought to be active in the last 10,000 years, that are within an extended area o... National Atlas of the United States.
1986. University of Chicago Library. This is the ward map that preceded the 1992 map. The file was generated largely from voting district boundaries (which are numbered by ward) and ma...
1992. University of Chicago Library. This map was current from 1992 until 1998, when litigation forced some boundary changes. This file contains accurate straight lines in some places ...
1998. University of Chicago Library. This is the ward map for Chicago that was in effect between 1998 and early 2003. The file was derived from the Tiger 1998 voting district file. Geo...