All footprints represent buildings in imagery. I think the footprint I flagged likely envelopes 2 buildings and that the Western most footprint is oversized. Roofs tend to overhang footprins somewhat, so mapping the footprints slightly smaller is considered accurate. Sometimes the roof is extended to provide shade, or highways go underneath them in the imagery. This can also help when mapping in dense areas to not create data overlaps. Hope this helps. Thank you for your contributions.
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            Published using OSMCha: https://osmcha.org/changesets/169370008
            