Sam Couter sam-at-couter.id.au |OSM list| wrote: > Sean <[email protected]> wrote: > >> I never said I was mapping for a particular program or device. Garmin >> was just an example. I'm mapping for all programs and devices. As all >> programs or devices can render a loop way it just makes more since to >> do it that way. >> > > I don't know of any devices that consume OSM data without some kind of > conversion process. That conversion process is the only way to relate > OSM data to a particular device. So the representation of data in the > OSM database really doesn't matter to any end devices, only to the > conversion. > > How do you know we are not representing the data that makes it hard to convert to be use in other formats? If you think about it why do we show larger roundabouts as ways if they can't be easily be converted and used in other formats. Because ways can be easily converted even if the program or device can or can't understand that ways roundabout tag. The program or device will still display the way as a roundabout that the user will still understand what it is even if the roundabout tag is removed. > It's relatively easy for a converter to take, for example, a node tagged > mini_roundabout and substitute a small circular way if that makes sense > for the destination device/format. It's very difficult (call it > impossible) to go back the other way for a device that does actually > understand what a roundabout is. > > I'm not a programmer or script writer so I can't really answer this question. If the guys that write the Garmin program/scripts converters are anything to go by then they seem to be having trouble converting a tagged roundabout node. As you said "It's relatively easy" to do then, could you please supply the code or tell them how to do it. I'm sure it would be greatly appreciated. > What you are advocating removes a tag that means something, whatever > that is defined to mean, and replaces it with something that means > nothing in the best case, and is confusing (to the device, hopefully not > the human operator, but then hopefully they're driving, not looking at > the device) in the worst case. It's nearly always best to keep as much > meaning as possible in source data. > I'm not advocating the removal of any tags. I'm advocating that all roundabouts no matter on size be drawn as a way and be tagged as "juction=roundabout".
Sean _______________________________________________ Talk-au mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk-au
