Idea:
Additional information on the land claim size in cells.
Next to the land claim area, indicate how many squares it is "wide" and "long."
Reason:
9417 square meters doesn't mean anything to me. I'd get more information from 50x30 squares.
This would allow for better, simpler, and faster planning, setting, and editing of land claim sizes.
You can remember the size of the constructed base and use that size as a guide next time you choose a building site.