New Topographic and Terrain Maps for Downloading

We've added some new topographic and terrain maps. Many thousands of maps categorized alphabetically. Download topographic and terrain maps here.

Free United States ArcGIS Shapefiles by State

Free United States State ArcGIS Shapefiles, GIS Maps, Data and Resources.

Download U.S. Shapefiles.

Free Wireless ArcGIS GIS Shapefile Map Layers

Free FCC wireless shapefiles - cell towers and antennas, mobile, cell boundaries, fm, am, tv ntsc, tv digital and more.

Download the free FCC shapefiles.

Terrorism & Industrial Chemicals - Determine Your Risk

I've updated the Worst Case Scenarios: Terrorism & Industrial Chemicals resouce pages. EPA has brought back their "Vulnerable Zone Locator" feature and you can access it here.

You can locate toxic chemical facilities anywhere in the U.S. with ToxicRisk.com. Also, you can access reports about the worst case scenario of chemical accidents in your neighborhood

American Community Survey 2008 Release New & Notable

The U.S. Census Bureau continuously makes improvements to the American Community Survey (ACS) in an ongoing effort to best meet the needs of its data users. In 2008, this included several changes designed to improve the content and data quality of the ACS and provide new tools and resources for data users.

Here is a summary of what is new since the 2007 data release

Download Census Economic Briefs from the American Community Survey

Download Free Census Economic Briefs from the 2008 American Community Survey 1 year estimates. Released Late September, 2009 and include housing costs, property value, construction, earnings, food stamp recipients, median household income, poverty...

Download the ACS Economic Briefs.

Free 2009 Census Tiger/Line Shapefiles

Free Census Tiger/Line shapefiles are now available. County-by-state and 15 new national shapefiles are available. Shapefiles include: roads, places, school districts, zipcodes, census tracts, census blocks, census block groups and various other point, line and polygon features. An extremely rich data source.

Download 2009 Tiger/Line shapefiles