> 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.
I must confess I normally just add a landuse=residential to these. I'll quite often come across a new mapper who has used place=hamlet etc. Cheerio John On 29 Mar 2017 12:04 pm, "Severin Menard" <[email protected]> wrote: > 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 >> >> > > _______________________________________________ > HOT mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/hot > >
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