Geospatial data is any data that has geographic location as one of its attributes. More specifically, geospatial data is information about the locations and shapes of geographic features and the relationships between them, usually stored as coordinates and topology and represented by vector (point, line, polygon) and raster (grid) data models.
A Geographic Information System (or GIS) provides a framework for collecting, organizing, and joining geospatial data and related information so that it can be visualized, analyzed, and shared.
The Geospatial Data section of this guide provides information about and links to some commonly used and reliable sources of online geospatial data. These sources are organized into the following major categories (click to start exploring):
If you are not finding what you are looking for here and would like some assistance in locating geospatial data, email Josh Sadvari, GIS Specialist, at firstname.lastname@example.org.
By no means does this guide provide an exhaustive list of all available sources of geospatial data, focusing instead on some of the more commonly used and reliable sources. For additional sources of online geospatial data, see the list compiled on the Free GIS Data website.