Some GPS units will cease to operate on August 22, 1999. The fictional River City decides to begin a GIS program. Your guide provides an overview of Geographic Information Systems and how it works. Landsat Learn about the famous satellites which cover the world. Microsoft's Terraserver See satellite photos of your house on the Internet's largest database.
Satellites are always overhead, gathering data about our planet.
Learn how to find incredible images of the earth online. Using GPS Read about my adventure with a handheld GPS unit. Read this feature to find out how GPS works and how it will help make your commute a bit easier. Report it here .