Hi, landuse=residential shows an urban or housing sprawl and therefore can cross various existing boundaries. boundary=* is related to an official or existing boundary and in the case of a village, it will encompass not only one residential area, but sometimes several and other kinds of landuses like farmland.
I already saw people replacing the landuse=residential tag by place=town over a precise urban area for some towns in Africa what I think is basically wrong because these places are generally larger than the residential area. Sincerely, Severin 2017-03-29 14:03 GMT+02:00 Vao Matua <[email protected]>: > Thomas, thank you for the thoughts. > > I have looked at the building=farm and landuse=farmyard and believe they > do not apply in here in Ethiopia.A building that is a dwelling should not > be tagged as "farm". It is not possible to determine the use of a building > from aerial imagery. Last week I was in a village and a building that > looked like a house also had a room that was where livestock were kept at > night. In the same way similar looking buildings could function as a small > store (kiosk). I would like to stick with building=yes, but also have a > landuse tag that is useful for cartography, but also humanitarian uses like > malaria elimination, or population estimates. > I would also suggest that boundary is not a good idea in Africa. In the > next decade it is predicted that there will be a huge migration shift to > cities, the places these people will live will be outside of existing > administrative boundaries. My opinion is that HOT stick with landuse as we > see it and let those with authoritative information create the boundaries. > > Emmor > > On Wed, Mar 29, 2017 at 12:54 PM, Thomas Hills <[email protected]> > wrote: > >> Hi, >> >> Firstly this is my first post to the HOT mailing list so I should >> introduce myself. I'm Tom Hills (http://www.openstreetmap.org/ >> user/Thomas%20Hills) and I got involved through Missing Maps London in >> August 2014. I'm not a GIS, humanitarian or coding specialist so I'm just a >> plain old normal volunteer. >> >> Majka, I agree with you that landuse=residential isn't particularly >> useful in the region Emmor quoted. The wiki suggests that it is for an area >> which has predominantly residential buildings. It says that it should not >> be used as 'an abstract wrapper around buildings grouping them without a >> difference between residential landuse within and other landuses around >> being observable'. I know the wiki isn't infallible but that sounds >> relatively sensible to me. Of course the region should be mapped in >> accordance with the task instructions, but if I were mapping this outside >> of HOT I would use a different method. >> >> I should probably know this already, but what *is* the method for >> estimating population density within HOT? I imagined it used building count >> rather than residential area size. Is there a diary entry on this? >> >> Continuing the thought, I am unaware of how long the three or more >> buildings 'rule' has been around in HOT, but I remember it from my first >> Missing Maps mapathons in 2014. This discussion seems to be a good time to >> ask: Has anyone recently reviewed the utility and relevance of the rule for >> HOT purposes? >> >> Emmor: There's specific tags for farms, e.g. building=farm and >> landuse=farmland. From what I gather from what you've said and shown, I >> think that they might be appropriate instead of your >> agriculture_residential and pastoral_agriculture landuse proposals. >> >> Cheers, >> >> Tom >> >> On 29 March 2017 at 09:33, majka <[email protected]> wrote: >> >>> First, overlapping landuse areas (even different ones) should *always* >>> be corrected. It brings problems with the map data, I have seen and >>> corrected areas where the overlapping did hide ponds from the rendered map. >>> The *same* overlapping area masks some of the problems but should be >>> corrected as well - either by deleting of one of the areas or by merging >>> both together. >>> >>> The next question is the landuse *size* in the mapped area. >>> >>> From the view of the mapper in Europe, the landuse=residential in HOT is >>> problematic. The residential area should be only where the region is used >>> *above >>> all* for housing people. The HOT use is to mark areas where there are >>> *some* houses, depending on the project instructions. This ends with a >>> very problematic rendering of some areas. Visually, you get one big blob of >>> something most people understand as a town, not the reality of fields and >>> farms. The very loose residential areas shouldn’t be there at all, IMHO. >>> Villages/towns boundaries have their own tag, *boundary*. Usually, this >>> is paired with boundary=administrative which is mostly unusable for HOT >>> distance mapping because the information isn't available to the mapper. But >>> nothing speaks against own tag - see here >>> <http://wiki.openstreetmap.org/wiki/Key:boundary>. >>> >>> IMHO, the ideal solution would be to change the HOT practice of mapping >>> residential areas. Leave landuse=residential only to the areas, where the >>> buildings are densely packed together (even in a village, where there is >>> *real* street there might be a residential area) - keeping the common >>> interpretation. Give the residential area a lower importance than it has >>> now, and start using the boundary instead, for example boundary=residential >>> to mark the areas with buildings. A later mapping on the ground or use of >>> governmental data if available could then change this in real >>> administrative areas marking the hamlets, villages, and towns where >>> appropriate and leaving the *residential* boundaries to the rural farm >>> areas. >>> >>> Ideally, such change would be preceded by discussing on the HOT and >>> tagging list and followed by updating the wiki definition of a boundary, >>> and by updating the HOT materials for users. It would need a slight change >>> in JOSM HOT presets and in the iD editor as well, probably. However, it >>> shouldn’t be very difficult to do so. >>> >>> I understand the residential areas are used for getting population >>> density in the HOT projects. The use of both tags together would be a >>> better choice, getting the information about sparsely and densely populated >>> areas at the same time. >>> >>> Majka >>> >>> On 29 March 2017 at 08:10, Vao Matua [email protected] >>> <http://mailto:[email protected]> wrote: >>> > >>> >>> Nick & John, >>> >>> Determining where to draw the edge of landuse=residential can be >>> difficult. >>> Here in Ethiopia most of the population lives in a rural setting where >>> they farm areas of 1 to 10 hectares in size. >>> http://www.openstreetmap.org/#map=16/6.9634/38.4408 >>> There are places where people live in villages, but often dwellings are >>> quite dispersed. >>> >>> >>> >>> _______________________________________________ >>> HOT mailing list >>> [email protected] >>> https://lists.openstreetmap.org/listinfo/hot >>> >>> >> >> _______________________________________________ >> HOT mailing list >> [email protected] >> https://lists.openstreetmap.org/listinfo/hot >> >> > > _______________________________________________ > HOT mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/hot > >
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