Jack Stringer wrote: > I am not a bus spotter or a photter but why would I want to know what > route the 172 Bus takes? Other than from a route planning PoV so that > I don't get stuck behind them all the time. You have a car. Many people need maps to plan journeys without a car. Other wise why would be bother putting in railways? taxi stands?,cycle routes?...
> I understand that people would like to put bus routes into OSM but > does it have to require the cutting up of roundabouts and junctions? > YES.. There's no significance in making the ways linked in a circular fashion to describe a roundabout into a single way,. What makes the roundabout more special than the through road from either side? You could argue that the through road should be the continous way, (eg a roundabout in the middle of a long named road) and the 'crossing parts' of the roundabout be the separate segmented ways: Either case doesn't get around the fact that by combining the parts in a larger way, you can't describe the different attributes of each part. If smaller adjacent parts have the same attribute then software can cope with that, but you can't give a single way two contradictory attributes - therefore they have to be split up. Data should be broken down into the smallest atomic pieces, and pieces only combined if all attributes are the same. If the renderers don't cope with it, that's a rendering problem, not a data problem. The point of relations is that they're atomic components with a simple definition (ie: bus route 66, operated by, times & days, website,...) and using relations is much easier than having lots of ways each duplicating the relation information. By using relations, we're making both the ways and the relations individually simpler, but the cost is to do it is that there must be more smaller individual ways. (and it's not just roundabouts, the same criteria would apply to a road if a bus turned off it halfway to go down a side road, the road's way would need to be split at the route divergence.) _______________________________________________ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
