If you’re a photographer who often hikes in the great outdoors, the mapping service FATMAP has added a new feature that you may find useful. It’s called the Travel Distance layer, and it shows on a 3D map exactly where you’ll be able to hike to in any given amount of time. The map doesn’t just take into account the straight line distance for its calculations, but the geographical properties (e.g. slope/gradient) of the map as well. Surface properties such…