When was the last time you planned a backpacking trip without a computer, phone, or GPS unit? Think hard. Unless you're a dedicated old-schooler, it probably wasn't recently. If your map skills are ...

(Data West Research Agency definition: see GIS glossary.) A map depicting terrain relief showing ground elevation, usually through either contour lines or spot elevations. The map represents the ...

In the second half of the 20th century, the foundation of the U.S. Geological Survey’s national map series was the handcrafted 7.5-minute topographic map. Times change, budgets get squeezed and ...

The most complete digital topographic ever made of the Earth was released by NASA today (Oct. 17). The map, known as a global digital elevation model, was created from images collected by the Japanese ...

The new three-dimensional map of Earth has been completed. Mountain peaks and valley floors across the globe can now be seen with an accuracy of just one metre. The global elevation model was created ...