Other replies already alluded to this, but the bridge is often mapped as an area like at https://www.openstreetmap.org/way/604254012 with man_made=bridge. This allows you to tag all the attributes of the bridge distinct from the road way which crosses the bridge. eg. name=* and ref=*.
On the main road way like https://www.openstreetmap.org/way/52981128 (but also in this case each of the cyleways that are part of the same bridge, the bridge reference would then be bridge:ref= as ref= would refer to the road reference not the bridge reference. Yes this results in duplicate information tagged on both the highway=* way and man_made=bridge area but it makes it easier for data consumers this way, otherwise you need to do spatial intersection tests. While smaller bridges won't have a man_made=bridge mapped out, over time as the map improves they would be added. It also helps determine, for example in the Merimbula Lake Bridge case, if there is one bridge that the road and cycleways share, or there is a road bridge and then two seperate bridges for the cycleways adjacent. Tagging man_made=bridge makes it clear (again through a spatial intersect) that there is just a single bridge, whereas without it, it would be unclear. I think the ref=* tag on man_made=bridge, and bridge:ref=* tag on highway=* is the way to go. Bob for your case I'd go with aeroway:ref=* for the airstrip reference, leaving ref=* for the road reference. On Wed, 14 Apr 2021 at 16:48, Andrew Hughes <ahhug...@gmail.com> wrote: > Hi All, > > I've found an appropriate tag of bridge:name and have applied it to the > bridge: > https://www.openstreetmap.org/search?query=Merimbula%20Lake%20Bridge > > But I also know this bridge has an asset id of "BID7" for the asset owner. > These asset id's are frequently referenced within the transport industry > and I believe they would be beneficial to OSM.However, I can't see anyway > of adding an ID to the bridge (or any other asset for that matter). > > Furthermore, being able to search by the asset id using nominatim would > also be highly desirable - just as searching for the bridge name works a > treat! So if there's any potential there it would be great. > > Any advice would be appreciated. > > Thanks in advance Andrew > > _______________________________________________ > Talk-au mailing list > Talk-au@openstreetmap.org > https://lists.openstreetmap.org/listinfo/talk-au >
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