Rinalds L. (Aug 30 2026 at 10:39): Rinalds L. (Aug 30 2026 at 10:39):Hello, I would like for someone to take a look at this duplicated river segment which has been bugging me out.
It's like really two rivers on top of each other. I dont know why that is there or how that happened. Also, there is a slight chance it could have been caused by me using JOSM, but that can't be the case.
Check this changeset out to verify whether that's true.
https://www.openstreetmap.org/changeset/188217445
Thanks!
Rinalds L. (Aug 30 2026 at 10:41):Where it's located:
HellMap (Aug 30 2026 at 10:46):Honestly, there are so many ways JOSM can break things in different ways in different scenarios that it's probably impossible to say what exactly you did. The version 1 of https://www.openstreetmap.org/way/1553501669 is definitely from your changset. I can delete it if you want. I assume you were merging but something didn't complete properly. I don't know.
Rinalds L. (Aug 30 2026 at 10:47):Yeah definitely delete the duplicated segment. I just tried to split it instead of merging I think. Because of the culvert thing that needed to be changed.
HellMap (Aug 30 2026 at 10:48):Is it really a culvert there? It really looks like a bridge on Mapillary.
Rinalds L. (Aug 30 2026 at 10:48):Oh no I meant to add layer=-1 instead of culvert. Yeah
Rinalds L. (Aug 30 2026 at 10:49):There wasn't a layer=-1, that's what I tried to add If I remember correctly.
HellMap (Aug 30 2026 at 10:51):You don't need to add layer=-1 since the bridge is already layer=1. Or rather, there is no point in adding more layer separation. Layers are relative to each other. So layer=-1000 and -999 is the same as layer=300 301 . It's just convention to use 1,2,3 for bridges and -1,-2,-3 for tunnels, culverts and such
Colby (Aug 30 2026 at 10:53):
i recommend adding this to your toolbar
this probably happened because you were working on partially downloaded stuff
Rinalds L. (Aug 30 2026 at 10:55):Yeah, most likely. I will add that, thanks. And regarding layers, I will keep that in mind, because I thought for bridges like that which are on the same layer as road and on the map same layer too, it should be on layer 0 and just the waterway under it -1.
Rinalds L. (Aug 30 2026 at 10:55):Will do that only for culverts
HellMap (Aug 30 2026 at 11:04):If features connect to each other, then it is assumed that they "transition" the layer. So a layer=0 road connecting to layer=1 bridge means the layer changed for that road. In contrast, if a feature doesn't connect but still crosses another feature like layer=1 bridge over layer=0 river, then those are features that are in different physical locations vertically. The two errors are thus things like rivers connected to roads, which don't pshysically connect, or unconnected features like ditch and road using the same layer.
Last updated: Sep 10 2026 at 11:46 UTC