On Mon, Mar 31, 2008 at 6:41 AM, David Dean <[EMAIL PROTECTED]> wrote:
> Martin Vidner <martin.osm <at> vidner.net> writes: > > > Make the prefixes "left:", "right:" special in the sense that when a > > way is reversed, they get swapped. > > So left:highway=bus_stop would become right:highway=bus_stop. > > (Uh, maybe this is awkward for the renderer implementation. Could be > > better to prefix the *value* instead: highway=left:bus_stop?) > > > It seems to me that you could define the two sides of a way independent of > the > direction (if any) of the way. I'm just not sure what you would call the > two > sides. > > For example, lets start with "north" and "south". This would unambiguously > define the two sides for all ways that are not running directly (or close > to) > north-south. "East" and "west" would work for those of course, but we want > the > same name no matter what the angle of the road. > > Maybe you could use "clockwise" and "anticlockwise" to define the side of > that > portion of the road you would get if you rotated it in that direction. > > So what I am basically getting at is that you don't need to define the > side of > the road based on the way direction, as it can be defined by the compass > points, > I'm just not sure what the two labels would be. Maybe "north-or-east" and > "south-or-west" shortened to "noe" and "sow" could work if everything was > clearly defined on the wiki. > > - David > Sounds like you're assuming all streets are reasonably straight and/or progress in a well-defined direction. That may generally be the case over a long stretch of road, but it's not always the case (some roads tend to wind around a lot), especially if ways are split. I don't know why everyone's opposed to left/right. It's unambiguous, and properly structured it would not be difficult for editors to accommodate it. Reversing the direction of a way should be something that's done rarely anyway. Karl
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