Home Innovations Cartography NASA releases 3D topo maps of US

NASA releases 3D topo maps of US

Jul 16, 2002 People around the world will soon get to see their home planet in an entirely new way, as NASA extends the release of detailed topographical maps collected during the 2000 Shuttle Radar Topography Mission beyond U.S. borders to the rest of the globe.
NASA and the National Imagery and Mapping Agency (NIMA), partners in the shuttle-mapping mission, agreed this week on a policy to provide 90-meter (295-foot) resolution digital- elevation mission data from sites outside the United States to qualified researchers.

Selected data will simultaneously become available to the public. The two agencies also this week made public the mission’s research-quality 30-meter (98- foot) resolution topographic data for the entire continental United States.

National Imagery and Mapping Agency Director James R. Clapper and NASA Administrator Sean O’Keefe signed the agreement yesterday at NASA Headquarters, Washington.

The practical benefits of space-based synthetic-aperture radar data, which can see through clouds and provide researchers with terrain data of exceptional quality, can be applied to uses as diverse as flood plain mapping and location of cellular telephone towers in mountainous regions.

Shuttle Radar Topography Mission data are being processed at NASA’s Jet Propulsion Laboratory (JPL), Pasadena, California, into research-quality digital-elevation models one continent at a time.

When each continent is completed, the data will be sent to NIMA for additional finishing and then to the U.S. Geological Survey’s Earth Resources Observation Systems Data Center in Sioux Falls, S.D., for final archiving and distribution.

NASA is processing mission data for research purposes in response to requests from NASA principal investigators and other qualified scientists. Under the terms of the new agreement, researchers will submit their requests for international topography data to NASA/JPL.

The requests will be reviewed by NASA and NIMA, and the data will be released either for use by the approved researchers or for broad public access. Decisions on how data will be released will be made on a case-by-case basis.

NASA began processing mission data in April 2002 and expects to have all mission data processed and delivered to NIMA by the end of this year. All international 90-meter (295-foot) resolution data is expected to be available to the public no later than two years after JPL makes its final data delivery.

Still in discussion is a release policy for international 30- meter (98-foot) resolution measurements. However, at the National Imagery and Mapping Agency’s discretion, some 30- meter resolution international data may be made available in special situations in which the information can help protect life and property, such as during volcanic eruptions and floods; NASA, however, will have access to such data for its sponsored scientific research.

The Shuttle Radar Topography Mission (Feb. 11-22, 2000) made 3-D measurements of more than 80 percent of Earth’s landmass between 60 degrees north and 56 degrees south of the equator, areas home to nearly 95 percent of the world’s population.