Nick and others, Last week Andrew was helping someone identify and tag mines. Today, Nick is explaining huts.
Do you think that it would help to have a basic compilation of tags, satellite screenshots and pictures to help guide new mappers for this region? We could simply start a google doc for pictures, tags and just keep adding it. It might help with accuracy. Let me know and I can help. heather Heather Leson [email protected] Twitter: HeatherLeson Blog: textontechs.com On Thu, Sep 11, 2014 at 9:44 AM, Nick Allen <[email protected]> wrote: > Hi, > > A recent post on this list led me to investigate the tag building=hut. > > I'm not entirely sure that I remember it's history within HOT, but I > believe many of us started using it on round thatched dwellings at the > start of the Ebola outbreak. I've been creating a circle of the correct > size and tagging the way as 'building=hut' in much the same way as we > create a rectangle / polygon on a square sided structure and tag it > building=yes. The info on the main tagging wiki at > http://wiki.openstreetmap.org/wiki/Key:building shows the tag being used > on an area, not a node. > > I've had a quick look on overpassturbo for part of Liberia, and there are > clusters of the tag, in some places on a node & in others on a polygon - on > at least one occasion the node has a comment similar to '7 huts'. > > A quick query on taginfo for building=hut; > All 832415, > Node 8113 > Way 824247 > Relation 55 > > The purpose of creating the polygon was for the clever GIS folk to analyse > and create population estimates, when used in conjunction with the > landuse=residential polygon which needs to be traced fairly closely around > the perimeter of the cluster of buildings to allow accurate estimates of > population for a village / hamlet / town (Something to do with area > calculations). I suspect that it is still being used for that purpose, and > will continue to do so. Also if the building is traced it appears on the > map, but if it is a node it does not. On the basis you can do a more > accurate calculation on the area from the polygon & you can't do it on a > node that could represent an unknown quantity of buildings I think we need; > * When remote mapping an area, unless the task description says otherwise, > create a polygon for the round dwelling and tag it building=hut > * To ensure our own training & reference sites, such as wiki pages, > LearnOSM and slide shows or other materials are up to date - if it's wrong > & you can't fix it, at least highlight it so someone can. > -- > > Nick > > Volunteer 'Tallguy' for > https://wiki.openstreetmap.org/wiki/Humanitarian_OSM_Team > > http://www.openstreetmap.org/user/Tallguy > > Treasurer, website & Bonus Ball admin for > http://www.6thswanleyscouts.org.uk/ ([email protected]) > > _______________________________________________ > HOT mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/hot > >
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