Methods for Creating Spatial Databases

Caitlin Dempsey

There are several ways in which to bring spatial data into a GIS. This article provides a brief overview of some of the more common methods for creating vector GIS data.

Using GPS to Monitor the Earth’s Movement

Caitlin Dempsey

A network of research stations located across Southern California and Baja California was created in 2011 in order to detect minute movements of the earth.

U.S. discontinues selective availability of GPS to public

GIS Contributor

On May 1, 2000, the U.S. government discontinued "selective availability", which was the intentional degradation of GPS signals.