On Sat, Nov 28, 2009 at 9:08 PM, Richard Bullock <[email protected]> wrote: > > There's nothing stopping anyone mapping highways as areas. > > However, it could be a long time until routers and renderers catch up; the > majority of the world wouldn't be able to position the areas accurately > enough to make this worthwhile; GPS errors approaching the size of some > roads; no suitable aerial imagery; lack of time to get the theodolite out > everywhere...
I don't share your pessimism :P I just want to determine the best way to do it, in case it turns out other mappers also want to contribute in this way. > In summary, I have no problem with people mapping everything as areas; > however, I believe for the moment we will have to use both areas and ways. > Most wide rivers mapped as areas I've seen also have a way down the > centreline - to define the river name, and direction of flow. That's interesting. I wonder if there are other examples of single entities mapped as an area *as well as* a way? It seems this problem may have been solved before? > More importantly, using both ways and areas would render the way we'd expect; > wider when zoomed out because the way is rendering wider than the area; > wider when zoomed in because we are seeing the visible extent of the area, > and we can have street names rendered in the right direction down the > centreline. For routers we can continue to follow the ways as "navigation > paths", ignoring areas, and we can define the direction of travel for > one-way streets. Yeah, these are good thoughts. But there's something that tells me using an area AND a way for a single entity is a bit redundant... but maybe you're right - maybe it's really quite good as (at least) an interim solution. I still think that, if using this solution, there are still some uncertainties in terms of how to tag the areas/ways, and whether it's necessary to indicate the relationship of the area & way with a relation. I would imagine a relation would be useful to e.g. avoid tag duplication on the area and way. _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk
