Maps, Atlases & Spatial Imagery

With a public account you can create, store, and manage maps, scenes, layers, apps, and other geospatial content.
Share content with others. Access content shared by Esri and GIS users around the world.

The Cal-Atlas site facilitates the sharing of geospatial data and web map services by California government agencies, partners and stakeholders. Includes links to physical and cultural geospatial data from the California Spatial Information Library(CaSIL).

The CEIC uses the CERES Catalog as an online directory for reporting and discovery of spatial data resources for California.

EnviroMapper for Envirofacts - An interactive GIS map using EPA spatial data at the national, state, and county levels.

Provides access to the National Spatial Data Infrastructure (NSDI) Clearing House Network and the geodata.gov portal. Geospatial One-Stop Initiative to provide “one-stop” access to all registered geographic information and related online access services within the United States. Geographic data, imagery, applications, documents, web sites and other resources have been catalogued for discovery in this portal.

GeoGratis is a portal provided by the Earth Sciences Sector (ESS) of Natural Resources Canada (NRCan) which provides geospatial data at no cost and without restrictions via your Web browser.

LandScan is a global population database that shows geographical distribution of population at one-kilometer resolution over an average 24-hour period. The LandScan algorithm uses spatial data and imagery analysis technologies and the most up-to-date census data within an administrative boundary.

Free and open source desktop GIS software that allows users to create, edit, visualize, and public geospatial information on Windows, Mac, Linux and some other operating systems

ShareGeo is the place to find and to share geospatial data. You can search the data held in ShareGeo using keywords or by using a map to define the area you are interested in. Contributing data to ShareGeo is also very simple. Just register and then click "contribute" and follow the steps to upload your dataset.