Hello, though you made some mistakes, I can certainly see improvement in your mapping e.g. you identified and mapped 3 valid buildings in the North. --- Unlike the previous project you were contributing to barriers are beyond the scope of this one, so you are not required to map them. The things you mapped as hedges are in fact trees. You changed a tag of a multipolygon to building=yes resulting in overlapping buildings and highways on the map. If you're unsure about feature tagging consult https://wiki.openstreetmap.org/wiki/Map_features . You may be able to see how that looks on the map by visiting https://www.openstreetmap.org/changeset/174435612#map=18/6.941923/126.258137 . You can see the changes I made to your mapping in https://osmcha.org/changesets/174435612 . Watch this short video about mapping buildings https://www.youtube.com/watch?v=oNJiIL_qTIM . --- Please keep this feedback in mind when contributing in future. 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/