This category contains introductory text about GIS data such as types of error in GIS datasets, types of GIS data (raster and vector), and metadata. Find resources to finding GIS data and where to download data.
On May 9, 2013, President Barack Obama sign an executive order making the default for government data “open and machine readable”. The executive order was accompanied by the White House’s Open Data Policy.
The Ventus Project at Arizona State University is seeking the public’s help to map out the location of all the world’s power plants. The project is led by Dr. Kevin Robert Gurney and seeks to measure carbon dioxide output at those power plants.
The series of Landsat satellites has been collecting global imagery continuously since 1972. A total of eight satellites and millions of pictures (and trillions of pixels) has resulted in a hugh amount of imagery which, when compiled, visualizes the massive amount of global change over the past thirty+ years. Landsat satellites capture imagery of the [...]