| USGS - United
States Geological Survey, Earth Science in the Public Service, providing a wide
variety of general information about USGS, it's products and services, and related
subjects such as Geographic Information Systems, public issues and environmental research. |
| NSDI
- the National Geospatial Data Clearinghouse, a component of United States' National
Spatial Data Infrastructure. Using spatial or keyword searches, locate USGS geospatial
data. Many data are free; others require that a small distribution fee be paid. |
| NASA's Visible Earth
- Explore the world through NASA's satellite images. A wide variety of
sensors and areas of the Earth are available at various resolutions. A
searchable directory of images, visualizations, and animations of the
Earth. All data is free. |
| NASA Earth Observatory
- More of NASA's satellite images, as well as related news, launches,
references and experiments. |
| JPL -
Jet Propulsion Laboratory, NASA. There are some images and videos of the San Francisco,
Los Angeles and Pasadena areas, and information about radar images, the Space Shuttle, the
Spaceborne Radar Lab, and AIRSAR, as well as educational materials, and sample radar
images and software |
