The building footprints are inaccurate becasue they are oversized and not squared, though they should be. In order to square buildings the nodes must be placed accurately enough before hand, else they might not square. This is to allow for mapping fo buildings which have some square corners but also others which are not. The imagery allows for you to map these buildings more accurately than this.
            ---
            #REVIEWED_BAD #OSMCHA
            Published using OSMCha: https://osmcha.org/changesets/154288912
            