How to tag / level a road or railway line on top of an embankment. My guess is 0, only when its crossing another lower road or railway line it gets on top of a viaduct level 1. Or should the whole line being tagged level 1 as long as its stays up the embankment ? As some mappers did tag the embankment with a railline already 1. asked 31 Aug '12, 21:29  Hendrikklaas |
One Answer:
As explained as an answer to your question "Why are layers numbered -1 and 1 and is there no other variation?", layers are relative to other features. So yes, your guess is correct - the only place where the railway needs a layer=1 is where it crosses above another element on a bridge/viaduct (e.g. road or railway line). (I'm assuming here that you meant layer, not level. level is used for floors within a building and would be completely out of place for an railway line on top of an embankment.) answered 31 Aug '12, 22:58  Tordanik |
But what about the tag embankment voor roads on a dike ? I just got the message use embankment for een lifted road 1, and cutting for a digged in one -1. So I doubted how to proceed.
You "just got the message"? Where? From whom?
I believe that the author of the question is from the Netherlands, which is extremely flat - so it may be there that mappers do tend to map the clearly-defined ground level as layer 0 and everything else relative to that.
Those of us in the hilly parts of the world don't have that luxury - hence the correct answer "layers are relative to other features".
If you look at the comments at the answer to your question "How to tag a road (digged in) under a road that has been lifted ?" and pay attention to which comments are vote up and which are not, then there is no need for any confusion.