This geographic names data set provides a "mashup" of URLs for official city and county government web sites and city and county location data from the USGS Geographic Names Information System (GNIS). GNIS data includes incorporated places, census designated areas, unincorporated places, counties, and populated places.
The U.S. Census Grids provide raster data sets that include not only population and housing counts, but a wide variety of socioeconomic characteristics. These gridded data sets transform irregularly shaped census block and block group boundaries into a regular surface – a raster grid – for faster and easier analysis.
Nearly 90,000 high resolution scans of the more than 200,000 historical USGS topographic maps, some dating as far back as 1884, are now available on-line from the US Geological Survey. The Historical Topographic Map Collection includes published U.S. topographic maps of all scales and editions, and are offered as a georeferenced digital download or as a printed copy from the USGS Store.
SEDAC’s mission is to develop and operate applications that support the integration of socioeconomic and earth science data and to serve as an “information gateway” between the earth sciences and social sciences.
Spatial Data Integrator is the first Open Source ETL (Extract, Transform, Load) solution specialized in the manipulation of geographical information and supported by an editor.
A variety of tools for working with datasets. data visualization, mapping, blogs, data catalogs, R tutorial, web crawlers, data mashers, code, lists of projects, APIs, etc.
PostGIS adds support for geographic objects to the PostgreSQL object-relational database. In effect, PostGIS "spatially enables" the PostgreSQL server, allowing it to be used as a backend spatial database for geographic information systems (GIS), much lik
OpenLayers is a pure JavaScript library for displaying map data in most modern web browsers, with no server-side dependencies. OpenLayers implements a (still-developing) JavaScript API for building rich web-based geographic applications, similar to the Go