Following the discussion in [HOT] [Tag] #767 - Mali, Bamako and merging some points here in [HOT] [Tag] landuse=residential in rural and urban areas
Pierre Béland <[email protected]> wrote: > In urban areas, we shoud simply have a large polygon > around the urban area and not cut at each street. I have seen also that the instructions were updated with "In Bamako, do not trace small polygons for each section of houses between streets. A large polygon [covers] the city." A few comments: * I think this is a good addition, thank you. * Minor edit: I guess 's' is missing in cover[s]. * Minor trouble: I could not find the one large polygon that covers the city. What do we do now with the existing smallish landuse=residential inside Bamako? Do we leave them? Do we remove them while mapping or reviewing or do we wait after next-level validation? Tom Taylor <[email protected]> wrote: > My own practice for large urban areas (last experience was a Canadian city > rather than a HOT task) is to carve them up into multiple > landuse=residential areas, bounding them on roads or other landuse types. Tom, thank you for your insight, I can see even in Bamako that other people follow your practice. It can be very nicely done but I find it hard to get homogeneous mapping and according to the following statement it seems like extra work but not immediately useful: Pierre Béland <[email protected]> wrote: > If you trace a large residential polygon, > and inside it small polygons for schools, hospitals or any other landuse, > you do not need to cut everything. > The Map Renderers should know how to interpret this. althio althio wrote: > > My previous message leads me to a more generic question. > > In http://tasks.hotosm.org/project/767 and maybe some other project, > the instructions reads: > "Settlements: > Trace polygon around clusters of houses. Tag with landuse=residential" > > I feel these instructions are related to rural areas. They can be > misunderstood in the context of urban areas. In this project we are > also mapping inside Bamako, very urban and very dense. > > What about urban areas? What is the good pratice, the recommended size > for landuse=residential in Bamako and other African big cities? > * Only one huge outline landuse=residential around the whole city > * By neighborhoods? > * Cut by main roads (arteries of the city) > * Block by block > > As I map and review I see almost every case. > > Has this been discussed or documented already? > > althio _______________________________________________ HOT mailing list [email protected] https://lists.openstreetmap.org/listinfo/hot
