There are still some environments where a smartphone won’t do, and you need the battery life and weather resistance of a dedicated GPS. SAR is one of those environments, but it’s also one that demands accurate, high-quality maps. Once you’ve gotten used to tracking your location on a satellite image, or dodging cliffs on a steep descent using slope angle shading, it’s hard to go back to a confusing mess of blocky contour lines rendered in 160×240 resolution.
The three layers available are:
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