All but one of these footprints are valid; the one I flagged represents a barrier. The footprints you added here should have been squared. Two share a node: hold alt to prevent your cursor from snapping to data. Thank you for your contribution. If you want to experience the OSM community or to get timely feedback from other mappers; I recommend that you attend a mapathon. You can find events here https://osmcal.org/
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            Published using OSMCha: https://osmcha.org/changesets/164179798
            