Re: [OSM-talk] Why the HOT obsession with low quality buildings in Africa ?

2018-07-02 Thread Jean-Marc Liotier
On Mon, July 2, 2018 1:26 pm, Robert Banick wrote: > Many humanitarian groups use buildings as a rough proxy for population Yes, I have had that explanation from multiple sources involved in humanitarian uses of Openstreetmap: from that they can calculate, for example, the impact a a flood. I bel

Re: [OSM-talk] Why the HOT obsession with low quality buildings in Africa ?

2018-07-02 Thread john whelan
Low quality building mapping is pretty general in Africa, I mentioned Malawi still has some 4,805 duplicate buildings in the HOT mailing list very recently which as a percentage of the buildings mapped is probably fairly low but is still a concern. The problem is one of data quality, is OSM reliab

Re: [OSM-talk] Why the HOT obsession with low quality buildings in Africa ?

2018-07-02 Thread Robert Banick
Many humanitarian groups use buildings as a rough proxy for population (density), or to ensure every household is covered during a vaccination campaign, or simply to navigate. Likely they use them for a combination of the three. As Phil says, it’s best to read the specific task. As a side note, it

Re: [OSM-talk] Why the HOT obsession with low quality buildings in Africa ?

2018-07-02 Thread Warin
On 02/07/18 18:52, Frederik Ramm wrote: Hi, On 02.07.2018 10:24, Jean-Marc Liotier wrote: churning out buildings like demented stonemasons trying to reach their weekly quota of gamified task-managing ! I recently stumbled upon https://www.openstreetmap.org/#map=15/-6.8958/39.1623 (Tanzania

Re: [OSM-talk] Why the HOT obsession with low quality buildings in Africa ?

2018-07-02 Thread Frederik Ramm
Hi, On 02.07.2018 10:24, Jean-Marc Liotier wrote: > churning out buildings like demented stonemasons trying to reach their weekly > quota > of gamified task-managing ! I recently stumbled upon https://www.openstreetmap.org/#map=15/-6.8958/39.1623 (Tanzania) and had a similar thought. The build

[OSM-talk] Why the HOT obsession with low quality buildings in Africa ?

2018-07-02 Thread Jean-Marc Liotier
Active in Senegal and Mali, I have noticed that changesets tagged with tasking-manager HOT projects produce very large numbers of buildings. Those buildings appear to be of very low quality. I wonder: who uses this data ? If it is only necessary to assess that people live there, then a landuse=res