[OSM-talk] nhgis.org

[Robert T Wyatt]

fyi, forwarded from maps-l [apologies if there are irregular line breaks]:

=== original message follows ===

Amazing.... Just sharing news that historical aggregate census data
and associated boundary shapefiles files from 1790 to present are now
online provided through the Minnesota Population Center at the
University of Minnesota.  Its FREE !!!
http://www.nhgis.org/

About:
The National Historical Geographic Information System
<http://autobahn.esri.com/esri/etrack.aspx?DSN=Production&FORMID=113401&INTID=131001&AUDID=1209301&URL=http://www.nhgis.org>
(NHGIS) provides, at no cost, aggregate census data and GIS-compatible
boundary files for the United States between 1790 and 2000. There are
two options for mapping NHGIS data: download boundary files for use in
GIS software or create maps using Social Explorer
<http://autobahn.esri.com/esri/etrack.aspx?DSN=Production&FORMID=113401&INTID=131001&AUDID=1209301&URL=http://www.socialexplorer.com/>,
an online mapping application. The geographic boundary files include
states and counties from 1790 to the present and census tracts from
1910 to the present.