Created by the National Aeronautics and Space Administration (NASA), the purpose of this site is to provide a place where the public can obtain new satellite imagery and scientific information about our home planet. The...

This is an e-book of before-and-after Landsat images (1972-present), showing recent environmental events and introducing the concept of remote sensing. Some changes are due to natural causes and some are due to human...

Students use skills gained from the Web-based GIS tutorial to explore the Willamette Watershed in Oregon. A correlation will be found between types of trees and the riparian zone along the McKenzie River. Population in...