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 ...

Using colorized topography, Mercury's 'great valley' (dark blue) and Rembrandt impact basin (purple, upper right) are revealed in this high-resolution digital elevation model merged with an image ...

Colour-coded topographic view shows the relative heights of features in Cerberus Fossae: reds and whites are relatively higher than blues and purples. The image is based on a digital terrain model of ...