[Tagging] Coastline around a bridge?

Frank Steggink steggink at steggink.org
Wed Oct 3 14:33:42 BST 2012

No, the bridge, called Hollandse Brug, is not a dam, although the  
bridge separates two waterbodies. The one to the northwest is called  
the Markermeer, and the other one is called Gooimeer.


On the other hand, the Houtribdijk (dijk Enkhuizen-Lelystad) is a dam,  
but that is not indicated by the coastline. See  
http://osm.org/go/0E7zb56-- The waterbody to the northeast is called  
the IJsselmeer (IJssel lake), and to the southwest is the Markermeer  

I think that the big lakes (IJsselmeer and Markermeer) should be  
tagged as coastline. They form a distinct part of the outline of the  
Netherlands. The Gooimeer, and the other lakes bordering Flevoland  
(like Veluwemeer, etc.) are not.

Actually, that would be tagging for the renderer, which is bad. (The  
bigger lakes are freshwater lakes.) Shouldn't coastlines be reserved  
for the coasts of seas and oceans only?


Quoting Martin Koppenhoefer <dieterdreist at gmail.com>:

> 2012/10/3 Martin Vonwald <imagic.osm at gmail.com>:
>> Hi!
>> Any reason why the coastline should go around a bridge?
>> http://tools.geofabrik.de/osmi/?view=coastline&lon=5.13984&lat=52.32549&zoom=16&opacity=0.55&overlays=coastline_error_lines,line_not_a_ring,line_overlap,line_invalid,line_direction,questionable,coastline_error_points,unconnected,intersections,not_a_ring,double_node,tagged_node
> that's obviously nonsense :D, or is it a dam?
> cheers,
> Martin
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