I obtained the Western Cape 1:50 000 in *.tif files from the Chief Directorate: National Geo-Spatial Information. I had to go through them individually to find out which were published before 1960, i.e. on which the copyright has expired. There are 39 of these. It would be useful to have this as a slippery map when editing in JOSM, particularly tracing rivers, possibly some roads and mountain peaks, including heights (if converted from feet to meters).
I hope to get the rest of South Africa some time, but it will take time to pick out the ones on which the copyright has expired. I have no idea how to do this, and Grant's instructions is Greek to me. Is there someone else who can do this? Who should I send the data to? Lance Burger On Thu, 2010-04-22 at 10:10 +0100, Grant Slater wrote: > If I get a chance, I'll have a go at re-projecting and turning into a > slippymap. > > Also happy to help someone else do this. > Basic steps: > 1) Crop images to borders > 2) Add control points via gdal_translate (jpg -> geotiff) > 3) gdal_warp to EPSG:900913 (reproject) > 4) tile... using patched gdal2tiles (patch changes TMS origin from > bottom left to top left.) or other script > > I have the scripts that were used for the UK Ordnance Survey map conversion: > http://os.openstreetmap.org/ > > / Grant > > On 22 April 2010 09:43, Lance Burger <lance.bur...@mweb.co.za> wrote: > > I had a look at the maps. It is very interesting to see them and the > > copyright on them has expired. Unfortunately the scale is rather small, > > 1:250 000. It would be useful to trace some rivers, but it would not be > > very accurate. I will try to find some old higher resolution maps from > > the Department of Trig Survey, or whatever it is called now. > > > > Lance Burger > > > > On Tue, 2010-04-20 at 18:10 +0200, John Grant wrote: > >> (Follow on from and earlier thread- CD:SM Topographic map of ZA in Nov) > >> > >> In November there was some discussion about a source of out-of copyright > >> raster maps which may be useful for mapping Rivers, geological info etc. > >> > >> The University of Texas has a great collection of 1:250000 US army maps > >> which > >> may serve this purpose: http://www.lib.utexas.edu/maps/ams/south_africa/ > >> > >> Copyright info under FAQs http://www.lib.utexas.edu/maps/faq.html#3.html > >> > >> If nothing else they are beautifully made, good resolution and of historic > >> interest. > >> > >> Regards, > >> John > >> > >> _______________________________________________ > >> Talk-ZA mailing list > >> Talk-ZA@openstreetmap.org > >> http://lists.openstreetmap.org/listinfo/talk-za > > > > > > > > _______________________________________________ > > Talk-ZA mailing list > > Talk-ZA@openstreetmap.org > > http://lists.openstreetmap.org/listinfo/talk-za > > _______________________________________________ Talk-ZA mailing list Talk-ZA@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-za
