Keeping track of Land Impact over multiple parcels isn’t as straightforward as most would want. If you have multiple parcels on a sim you would have to check “About land / Objects” on each parcel you own.
This can become quite the inconvenience if you have multiple parcels that you are sharing with other avatars. To solved this problem i have create the Avatar Land Impact Monitor.
The Avatar Land Impact Monitor scans all parcels that you (or your group) own in a sim and shows you the total land impact usage per avatar.