> > if you have x number of detached residences occupied by offices, > it is not a landuse=residential >
Then it's mistakenly tagged. You do not use `building=detached` for shops and offices. Per the wiki, https://wiki.openstreetmap.org/wiki/Tag:building%3Ddetached > A detached house is a free-standing residential building usually housing a single family. Known as a *single-family home* in the United States, a *single-detached dwelling* in Canada, a *separate house* in New Zealand and *Maison individuelle* in France. It includes the _function_ of the building. > it follows from the detached residences inside > > if all plots have fences or hedges entered in osm, or if > the buildings touch each other, an algorithm allows you to build > the landuse=* of each building and merge the identical landuses > but sometimes you don't have enough info to find the value > of the landuse, so you don't have the info to create anything > other than a landuse=yes around each building 8or a place=plot) > It's not about coverage: humans tagging landuse do not have to have any specific quantity of info. They can infer from the landuse of an entire suburb by a specific street. And the same is true about a strip mall. If I I have one building with 25 offices inside and that's all that's in OSM, it's commercial. If a building has 25 shops inside and that's all that's in OSM it's retail. Seems pretty basic. Now let's assume you have 24 retail shops in a building and the owner is living upstairs on the second floor: that's a 24:1 ratio. A computer can store that calculation on the landuse. Currently the mapper just says "good enough" and the consumer is left to wonder how accurate the mapper was. > but this is not reality... plot boundaries can be absent from osm... > or a large enough plot can have commercial activity on one side > and residential activity on the other -> 2 landuse=* in osm > I haven't seen a single plot in Houston. I have no idea why these matter. Lift isn't mapping out plots before they map out unnamed landuse. I don't see how these are factoring into the conversation. Humans can't typically observe plots. Landuse is being mapped on the basis of the buildings contained. > -- Evan Carroll - m...@evancarroll.com
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