Good idea and some thoughts: They are definitely landmarks. Normally there is not mauch else where they are. Therefore definitely cartographic value.
They may be South African only, not sure. Would be interesting to hear once you start the process. I like the idea of using ways and areas to depict them and points to start off with. Many objects can be defined as both points and areas (and lines). Refer "Element" column on http://wiki.openstreetmap.org/wiki/Map_Features There are major man-made pictures going back thousands of years. http://en.wikipedia.org/wiki/Nazca_Lines in Peru and hundreds of meters in size. Not quite the same reason for making them but a similar concept from a mapping perspective and perhaps this or something similar could be used. See the Monkey: http://www.openstreetmap.org/?lat=-14.706994&lon=-75.138435&zoom=18&layers=M This is tagged man_made=geoglyph There I hit a dead-end Regards, John On 19 May 2013 14:59, Gerhardus Geldenhuis <[email protected]> wrote: > Hi > I don't think there is that many... I have seen the Riversdale one yesterday > purely by chance. I agree that they are worth mapping whether they warrant a > way is debatable but I am sure the owners of the various signs would want > them to be as prominent as possible, and ideally would like them rendered on > maps. I would personally tag such signs with a node, for example the cross > found on a hill in Rustenburg is very prominent visible in the night from > the ground but because it is vertical is not clearly visible from the > imagery. I would through it out to the wider OSM community. The other side > is also that if there is enough usage of a set of tags then it becomes the > norm. > > Regards > > > On 19 May 2013 12:29, Glen Wilson <[email protected]> wrote: >> >> Hi everybody >> >> It seems a not uncommon practice to for place names to be marked in huge >> writing (on a hillside). They're very visible and have, I feel, some >> cartographic value. >> >> Below is the start of a new tagging proposal. I thought I'd throw it open >> to the list first before going to all the effort of putting something >> useless on the OSM Wiki. This is just a start and I'll probably add more >> detail and examples as time allows. I haven't done much tagging of these >> objects because I've only just figured out what to tag them with. >> >> Tagging >> I propose placing a way over the name from left to right (of the word, so >> if it's upside down in you editor...) then tagging it with >> tourism=ground_sign name=*. That would probably be sufficient for the >> Riversdale example. For the Oord / Resort example, the way would simply >> contain multiple nodes to make it go around the corner. >> >> Often these the signs are pictures, or written in a weird font that a >> renderer like Mapnik can't do justice to. For these I propose tracing what >> you see on the ground and simply leaving the name=* tag blank. You can >> still include the name by putting the letters you draw into a relation and >> tagging that with name=* (all the better to be able to search for it). The >> markings near Wakkerstroom might require this method. >> >> Filled shapes can be created by using closed ways and multipolygon >> relations. I haven't come across such examples, but I'm sure they're out >> there. >> >> Supplementary tags >> >> width=* to specify how wide a line should be drawn >> color=* (or colour=?) to specify what you think it specifies >> surface=* or something similar to say what it's made of. >> >> >> Examples >> >> Riversdale near guess where: >> http://aerial.openstreetmap.org.za/?zoom=18&layers=B0&lat=-34.1142101&lon=21.2524555 >> Oord/Resort marking near Gariep Dam: >> http://aerial.openstreetmap.org.za/?zoom=18&layers=B0&lat=-30.5875051&lon=25.5080875 >> Voortrekker markings near Wakkerstroom: >> http://aerial.openstreetmap.org.za/?zoom=18&layers=B0&lat=-27.3728169&lon=30.1580294 >> >> I'm curious if these appear anywhere else in the world, or if it's just a >> local thing. There are other considerations too, like are ground_sign and >> tourism the best tag names to use (think about highway=road and >> highway=unclassified for an OSM newbie) >> >> What'd'ya think about that? >> >> Later >> >> Glen >> >> >> _______________________________________________ >> Talk-ZA mailing list >> [email protected] >> http://lists.openstreetmap.org/listinfo/talk-za >> > > > > -- > Gerhardus Geldenhuis > > _______________________________________________ > Talk-ZA mailing list > [email protected] > http://lists.openstreetmap.org/listinfo/talk-za > _______________________________________________ Talk-ZA mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-za
