A belated Open Data Hackathon announcement: AfriSpatial has released a project for the public to contribute to styling South African National map data as supplied by NGI. Read more about it, clone it and contribute at https://github.com/AfriSpatial/topostyle. It is all about serving up 1:50000 topographical map data styled just like the familiar paper map sheets, as one seamless layer for the whole country. And of course enabling anyone else to do the same. If you like it and use it we hope you will contribute to improving the map for everyone’s benefit.
If you just want to see the map, you can register on http://1map.co.za and switch on the “NGI/NGI Topographical” layer. Zoom in to 1:64000 or closer anywhere in the country and check it out. I know one thing: Geography teachers are going to love it. While you’re at it, switch to the “NGI Aerial Photography” base layer and adjust the topo layer’s opacity with the slider.