There re two stages to the building project. The first is to get the building outlines. The local cities basically have this information anyway.
The second step is to enrich these with tags giving the number of levels, the type, etc. I forget the full list of of attributes. Once you have that sort of information then you can run statistical analysis on them to get a lot of meaningful data. In Zambia they are doing population estimates from the number and floor space of the buildings together with the number of levels. That means you can plan where to put schools and clinics to best advantage. Or even coffee shops and putting a coffee shop in the best location is worth money and that's why Stats is so interested in the project and the same for the municipal governments. City planning is the key to this. Bjenk would get quite excited over the range of tags that got added and the number that were converted from building=yes to building=church or residential etc. Cheerio John On 28 January 2018 at 17:35, OSM Volunteer stevea <stevea...@softworkers.com > wrote: > John: Might I ask what you mean by "> Once the outlines are in place then > other tags can be added."? > > Thanks, Steve
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