To view proposal statistics
You can view statistics for all sketched features including the number of items added and removed, and the total area of those items.
Detailed proposal statistics for all sketched features include the following:
- Buildings: Plan area and floor space. Floor space is derived by multiplying the footprint area by the number of floors.
- Roads and Railways: Length, area, and tunnel volume.
Click Manage
Model Proposals 
.Select a proposal to view from the drop-down list in the Proposals Manager.
In the Type column, examine the sections for the feature types you have added to this proposal.
If details are available for a category of features, a Details section is provided.
Click a feature's ID value in the Details section for more information.