Natural Earth     Natural Earth is a public domain map dataset available at 1:10m, 1:50m, and 1:110m scales. Featuring tightly integrated vector and raster data, with Natural Earth you can make a variety of visually pleasing, well-crafted maps with cartography or GIS software.     http://www.naturalearthdata.com/     tags: data map earth geo gis IP address geolocation SQL database     http://www.iplocationtools.com/sql_database.php     tags: data geo geolocation IP address city geolocation HTTP API     http://blogama.org/node/60     tags: geo data True Marble Imagery - Free Download     Download and use the 250m True Marble global dataset for free! This is lower resolution than our full 15m product, but it is quite useful. Download to use on your web page or preview a purchase. We only ask that you display our copyright and reference this page when possible.     http://www.unearthedoutdoors.net/global_data/true_marble/dow...     tags: earth geo gis maps satellite imagery NOAA/NGDC/MGG-Topography, Digital Terrain Data     http://www.ngdc.noaa.gov/mgg/topo/topo.html     tags: geo data The National Map Seamless Server     http://seamless.usgs.gov/     tags: geo data Terrain data images     These subdirectories represent a viewable form of the NOAA GLOBE database. The data has been reduced from 16-bit resolution to 8-bit false color. For original data, contact Ed Falk or visit the GLOBE web site. Higher-resolution (1" and less) data is available from the USGS. See Ed Falk for some samples, including the Bay Area.     http://peregrine/efalk/Terrain/     tags: data geo U.S.Census Bureau - TIGER/Line‽     http://www.census.gov/geo/www/tiger/     tags: data geo census