Ore Detector Range

If you shove your small grid ore detector right upto the ground, should you not be able to see the deepest ores?
Currantly large ships have to shove their ore detector near the ground just to see everything, I think that should be raised too so they can passively cruise by and see all nearby ores in the vicinity.

With this, I'd also like dark patches indicating ore to be gone, or replaced with other more subtle, natural signs of various ores. The dark patches make planets ugly.