Okay, I went for a tour on the weekend, and ran into a place where GoogleMaps had a road that didn't exist. I decided to check OSM, and as expected, the OSM map was more accurate!
Anyway, that led to me looking at other roads in the area, and I found this issue. Grandin Road is a 4 lane collector, which I would consider a tertiary, but GeoBase has it as a residential road. On either side of the 4 lane road, beyond a median can be found 2 lane roadways where residents can access their homes, driveways, and park along the street. GeoBase has one access road on one side of the road labelled as Grandin Road, but on the other side of the road, it has no name. All three roads are tagged as residential. I'm thinking that a routing algorithm would not know any better, and might send someone down the side road, rather than down the main throughway. What is the common ground on tagging these things? I would guess that all these roads would get named Grandin Road, as the houses are all addressed as Grandin Road. I was thinking that the 4 lane section get bumped to tertiary as it is a collector road, and as such would be more important than just a plain residential road. The side roads could then stay as residential, or perhaps they would be better tagged at a lower level? Here are some links... This is the area close up on OSM: http://tinyurl.com/grandinosm Here's a streetview from Google so everyone has an idea of what the real world layout looks like http://tinyurl.com/grandingsv Having Google Streetview available is great, as it makes it really easy to share real world views of the area easily. I am constantly amazed at the information we have available these days! James VE6SRV _______________________________________________ Talk-ca mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-ca
