Depends on the scale. It might cost on the order of several MBs to store a km^2 at a moderate level of detail. For a small area that's relatively light, but bec

Depends on the scale. It might cost on the order of several MBs to store a km^2 at a moderate level of detail. For a small area that's relatively light, but becomes prohibitively large if you multiply by the hundreds of millions of square kilometers of a planetary surface...