what is GPS

A decade ago not many civilians had heard of a GPS, let alone seen or used one. Prior to the year 2000, Global Positioning Systems (GPS) and their receivers were expensive and largely limited in use to the military, government agencies, and specialized professions. Now, GPS receivers are commonplace […]

GPS Resources

November 12, 2011By Caitlin DempseyGPS

Global Positioning System (GPS) is a technology that uses the position of satellites to determine locations on earth. GPS is an essential tool for GIS because it allows for the gathering of data that locationwise is highly accurate. What is GPS? Rachel Quist explores Global Positioning Systems, its origins, how […]

Geospatial Artificial Intelligence: Emerging Trends and Challenges

There are both challenges and opportunities that Artificial Intelligence (AI) has in applying geospatial and GIS knowledge that also addresses issues of time and spatial bias.

Global Dataset of River Widths Developed from Landsat Imagery

Researchers used a combination of satellite imagery and field measurements coupled with statistical modeling to calculate worldwide river and stream surface measurements which is now available as a GIS dataset.

Elements of a Map

Maps are the primary tools by which spatial relationships are visualized. Maps therefore become important documents. There are several key elements that should be included each time a map is created in order to aid the viewer in understanding the communications of that map and to document the source of […]

Learn GIS for Free

There are a few online options to learn GIS for free. Take advantage of resources that provide you access to free courses from some of the world’s best universities and institutions.