On Tuesday 19 July 2016, maning sambale wrote: > > Another round of updates on LABuildings import. > Last week we've imported ~1.1M buildings in LA City. Over 100 > usernames participated. > We are close to finishing Phase 1 (LA City) and will continue data QA > and cleanup if needed.
A few observations from looking over the map there: * There are quite a few cases where gaps between buildings are either very small (significantly less than a meter) or buildings touch at a single node. Both are usually artefacts (probably primarily due to roof based rather than footprint based outlines). * There seem to be a lot of cases where garages and sheds are tagged as building=house or building=residential - like here: https://www.openstreetmap.org/way/409191451 * In some cases boundaries of pre-existing landuse polygons (like landuse=residential/landuse=industrial) and roads now intersect buildings indicating that mapping is inaccurate - like here: http://www.openstreetmap.org/#map=17/34.07461/-118.48376 All of these problems could probably be turned into maproulette tasks or be otherwise worked into QA tools - although at least the first two will require on-the-ground assessment for proper correction. -- Christoph Hormann http://www.imagico.de/ _______________________________________________ Imports mailing list [email protected] https://lists.openstreetmap.org/listinfo/imports
