A digital map of the elevation of an area on the earth. The data are either collected by a private party or purchased from an organization such as the U.S. Geological Survey (USGS) that has already ...

No audio available for this content. Topobathymetric digital elevation model of the confluence of the Potomac and Shenandoah Rivers at Harper’s Ferry, West Virginia. (Image: USGS) The United States ...

A team of researchers from the Institute of Applied Ecology of the Chinese Academy of Sciences has developed a new method to quantify the three-dimensional complexity of mountainous terrain. The novel ...

A team of computer scientists, ecologists and statisticians at Stony Brook University, working with a colleague from the U.S. Geological Survey, has found that it is possible to use AI applications to ...