Using JOSM with the search filters: "type:way highway:" to select and count all roads "type:way highway: (name: | ref:)" to select and count all roads that have names or refs and roughly assuming real-world road = OSM way I get the following statistics:
Johannesburg, from http://metro.teczno.com/ 51866 roads 20842 roads with names 40.18% of roads are named The provinces below are from http://downloads.cloudmade.com/africa/southern_africa/south_africa/gauteng#downloads_breadcrumbs and co. Gauteng 62105 roads 27222 roads with names 43.83% of roads are named Eastern Cape 21794 roads 9455 roads with names 43.38% of roads are named KZN 46943 roads 37193 roads with names 79.23% of roads are named Limpopo 4215 roads 1407 roads with names 33.38% of roads are named Mpumalanga 22075 roads 9060 roads with names 41.04% of roads are named Northern Cape 9261 roads 2500 roads with names 26.99% of roads are named Free State 14191 roads 5486 roads with names 38.65% of roads are named Prince Edward Islands no roads are listed North West 35554 roads 14886 roads with names 41.87% of roads are named Western Cape 60505 roads 39916 roads with names 65.97% of roads are named Obviously this isn't fully correct since roads running between provinces will be counted twice, but: Total roads for SA: 276643 Total named roads for SA: 147125 (53.18%) Some further questions to ponder: How did KZN get so many roads named? Why is Joburg's road naming below the Gauteng average? Does Limpopo really have only 4215 roads? Is there really no roads on the Prince Edward Islands or are they not captured? In Joburg, so few streets are named that most people and places I visit weren't on it until I added them. What can we do to improve this sad situation? The relative road to province percentage conversion for Gauteng is as follows: 1 road = 0.00161017% 10 roads = 0.0161017% 100 roads = 0.161017% 1000 roads = 1.61017% 621.05 roads = 1% Should we summarize this on the OSM Wiki page for South Africa? Thank you Damjan _______________________________________________ Talk-ZA mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-za
