Flying in wintry conditions generally has little impact on the quality of the data, but there are a few things worth noting. Cold weather shortens flight time, and snow on the ground prevents planimetric feature marking.
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Why You Should Use Terrain Awareness
Terrain awareness, or terrain-following as some like to call it, eliminates the variance in above-ground flight height and thus eliminates the discrepancies in overlap throughout sites with high topographic relief. Consistent overlap leads to more reliable data overall, and Terrain Awareness guarantees more consistent overlap.
