Hello Rupert, The first thing to do in my opinion would be to add a proposed structure for Zimbabwe to the wiki page for administrative boundaries at the openstreetmap wiki: - https://wiki.openstreetmap.org/wiki/Tag:boundary%3Dadministrative
Another possible source that would give you some idea is "free the postcode" http://wiki.openstreetmap.org/wiki/Free_The_Postcode you might be able to look at the blocks in a postal-code like way. When you tag the block identification in a postal-code like way on individual addresses, you can use standard GIS techniques like voronoy to regenerate the blocks from the individual addresses and at the same time check for anomalies. - http://wiki.openstreetmap.org/wiki/Free_The_Postcode - http://my2iu.blogspot.nl/2012/02/february-2012-go-transit-zone-map.html (explains using voronoi, to get a general idea) So in my opinion, you have two choices; - Generate blocks at an administrative level of your choice first and automatically add block info to addresses or - Enter block information as tags to addresses and analyse and correct afterwards. Hope this helps. Kind regards, Milo 2015-06-11 23:03 GMT+02:00 Rupert Allan <m...@rupertallan.com>: > Hi All, > I'm Rupert, and I work with MSF as Field Mapping Coordinator. In March and > April Kieran O'Sullivan and I worked on a Missing Maps project in the > Epworth, Harare, Zimbabwe, where MSF are struggling to trace patients in > order to deliver repeated treatment and follow-up for HIV, MDRTB > (Multi-Drug Resistant TB). This is crucial in the epidemiological struggle > (HIV at 15%), but also Epworth is an extremely vulnerable community, and > our new OSM community there now hold the key to Epworth's > self-representation and its accessibility to Humanitarian logistical > efforts, in a place where sanitation is a geological nightmare, mobility is > perenial, and housing consistently disappears in man-made and natural > disasters. > > We discovered that the population was up to five times its official count, > so we split the 840 field papers into NE, SE, SW, and NW quarters so that > Field Papers software could deal with it. > Now we have a few hundred papers coming in ready to input, and many more > on the way, although hampered by WiFi and hardware access. > In different parts of Epworth, address formats differ from others, so it > involves careful thought about how to deploy keys/values. > I mention in the Wiki > <?ui=2&ik=ccc520fed0&view=fimg&th=14de47ac7ed4e704&attid=0.0.1.1&disp=emb&attbid=ANGjdJ-FBKc-pucbTfXVUV-Siv62PeTgGYGBaPxOy8hD55ITDqzt1uAhsesOe5G01aLwPuwt-2NdOdDWPWEgG64sUx1T_nuC6YPHK-zQJW6qqDUvzBBaCMUNQfOG85k&sz=s0-l75-ft&ats=1434057793222&rm=14de47ac7ed4e704&zw&atsh=0>, > that this has evolved a degree of protection and 'anonymity' for the > unofficial majority there. Ethics are key, as they need to be protected > from certain factors and protected BY other factors (i.e. their visibility > to the world as a community). So its an important project, considering > where they are in history right now. > > The main issue is to input and tag 'block' boundaries, and figure out > which administrative level to tag them on. It would be great to discuss and > agree a bit with experienced JOSMers. The addresses depend on numbers, > names and qualifiers of small 6-10 house areas, often with a community > leader as the most definitive 'name' value. > Somebody mentioned the 'Hamlet' tag. Cells are used in some addresses, but > not others. The field papers are informative, but the addresses are defined > differently in different parts of Epworth. This serves to protect > communities. It's all very interesting... > > I am still learning JOSM, but maybe they fit into a 'multiple-choice' > style of categorising. Almost all have numbers, but an address could be > identical to another, except in a different ward, so miles away, or in a > different 'block', or might hint obliquely to status as 'unofficial'. The > numbers, by the way, are non-sequential/randomised. But it could all be > cascade-searched with the right OSM keys/admin level or tag. > > Any thoughts? > > Thanks, Rupert > > > _______________________________________________ > HOT mailing list > HOT@openstreetmap.org > https://lists.openstreetmap.org/listinfo/hot > > -- [image: http://www.dogodigi.net] <http://www.dogodigi.net> *Milo van der Linden* web: dogodigi <http://www.dogodigi.net> tel: +31-6-16598808
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