Hello. Thanks for mapping.
I am afraid that you have a bad start.
Sorry to say, but your mappings are not as what we might expect.
Issues : building nodes connected to each other. 
Buildings not squared.
Many buildings are duplicated (mapped a month before by another mapper)
I think that you did not zoom in far enough to see already mapped buildings. Check the bottom line in IDeditor for hidden mappings.
I invalidate this task.
Best regards