Re: [OSM-talk] Some guidelines on Africover data?
Great, thanks Grant, Good to see that my line of thinking was pretty much the same as yours; I just wanted to double check on consensus before inadvertently wrecking anything. Cheers, Joseph On 30 March 2010 13:25, Grant Slater wrote: > Hi Joseph, > > I've been cleaning up some of the Africover, mostly bound within the > DRC borders. > > The import seems to have been fairly messy. > > >> There is no source tag on the data that exists, only an AUTO_ID tag; >> an example way can be seen in 37424303 [3], although many more exist. >> I'm guessing that the AUTO_ID refers to a Africover reference system >> that has survived the import, whilst OSM specific tags need to be >> applied. >> >> Is there any reference available for telling what such ways should be >> tagged as? I'm worried that some may be rivers, in some cases possible >> dupes [4]. With a list to refer to, could ways such as this be tagged >> as highway:road or waterway:river, source:Africover when found? >> Leaving the AUTO_IDs would seem to be a good idea for now. >> > > I generally replace the AUTO_ID with a highway = road. The AUTO_ID is > now worthless data to have in the OSM system, we have moved on from > the original import. I'd say add source=Africover on the ways if you > like. Best to strip it on nodes. The amount of GPS (GPX) data coverage > is improving, especially in Southern Africa, so always compare. I > always give existing data preference over Africover. If the Africover > data feels VERY wrong, I think it is best to remove it rather than > disrupt future (local) mapping efforts. > > Some of the ways also seem to be railways. Many Central & East African > railways are being revived due to renewed interest in Africa's mineral > wealth and Chinese interest. > > I tag with brain activated :-) Even Landsat helps. Some major African > cities do have Yahoo! aerial imagery. > > Regards > Grant > ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] Some guidelines on Africover data?
Hi Joseph, I've been cleaning up some of the Africover, mostly bound within the DRC borders. The import seems to have been fairly messy. > There is no source tag on the data that exists, only an AUTO_ID tag; > an example way can be seen in 37424303 [3], although many more exist. > I'm guessing that the AUTO_ID refers to a Africover reference system > that has survived the import, whilst OSM specific tags need to be > applied. > > Is there any reference available for telling what such ways should be > tagged as? I'm worried that some may be rivers, in some cases possible > dupes [4]. With a list to refer to, could ways such as this be tagged > as highway:road or waterway:river, source:Africover when found? > Leaving the AUTO_IDs would seem to be a good idea for now. > I generally replace the AUTO_ID with a highway = road. The AUTO_ID is now worthless data to have in the OSM system, we have moved on from the original import. I'd say add source=Africover on the ways if you like. Best to strip it on nodes. The amount of GPS (GPX) data coverage is improving, especially in Southern Africa, so always compare. I always give existing data preference over Africover. If the Africover data feels VERY wrong, I think it is best to remove it rather than disrupt future (local) mapping efforts. Some of the ways also seem to be railways. Many Central & East African railways are being revived due to renewed interest in Africa's mineral wealth and Chinese interest. I tag with brain activated :-) Even Landsat helps. Some major African cities do have Yahoo! aerial imagery. Regards Grant ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
[OSM-talk] Some guidelines on Africover data?
Dear all, I would have emailed Robert Soden directly about this, but I read that he's in Haiti at the moment and probably has enough to keep himself occupied already. As such I thought I'd email the list. I've read on the wiki that the Africover import for Tanzania is complete [1], but I have seen a few areas that look as if the data has been imported, but without any OSM tags. See Tabora, for example [2]. There is no source tag on the data that exists, only an AUTO_ID tag; an example way can be seen in 37424303 [3], although many more exist. I'm guessing that the AUTO_ID refers to a Africover reference system that has survived the import, whilst OSM specific tags need to be applied. Is there any reference available for telling what such ways should be tagged as? I'm worried that some may be rivers, in some cases possible dupes [4]. With a list to refer to, could ways such as this be tagged as highway:road or waterway:river, source:Africover when found? Leaving the AUTO_IDs would seem to be a good idea for now. I'm keen to help improve OSM's Africa coverage and this seems like a simple way of helping out, if it's the appropriate way of doing so. Cheers, Joseph [1] http://wiki.openstreetmap.org/wiki/Africover [2] http://osm.org/go/l2pzYzJ [3] http://www.openstreetmap.org/browse/way/37424303 [4] http://www.openstreetmap.org/browse/way/37423971 ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
