MAPS: Under the Surface

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Science  23 Nov 2001:
Vol. 294, Issue 5547, pp. 1623
DOI: 10.1126/science.294.5547.1623e

The growing Digital Earth project allows users to create and download snappy, multilayered maps based on some 100 geology, geography, and geophysics data sets. Collected over the last 8 years by researchers at Cornell University in Ithaca, New York, the data sets cover national, regional, and global scales. They include information on the structure of Earth's crust, the location of faults, earthquake and volcanic events, magnetic and gravity measurements, details of surface topography, and descriptions of aquifers. With the site's mapping function, you can combine data to create composite images and build cross sections through Earth's surface by “stacking” data sets that describe different layers. If you're not satisfied with mapping, contact information explains how to get your hands on the underlying data.

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