BetaBetaDataset
To show features of earth's surface.
Topographic maps show the location, height, and shape of features like mountains and valleys, rivers, even the craters on volcanoes
Dataset consists of: location, height and shape of features like mountains and valleys, rivers and craters on volcanoes. Shading shows changes in slope or elevation.
Data is obtained from various sources: NASA's Space Shuttle, Canada's Radarsat satellite, and topographic maps made by the U.S. Geological Survey.