[OSM-talk] coastline within a park

[osm easingwold]

Robin Paulson wrote:

 


i'm after some advice. i know this is potentially tagging for the
renderer, but still

i've recently mapped a park which contains a basin. when the tiles
render, the whole area, including the water, renders green. how would
i tag this so the renderer understands the water bit should be treated
as water, and rendered blue?

cheers

http://www.openstreetmap.org/?lat=-36.90445&lon=174.85045&zoom=16&layers=B000FTF




The renderer is confused by having a park overlapping the sea and it's obviously getting the ordering wrong. What I would do is flatten the whole thing into 1 layer by creating a narrow strip of park around the basin and keeping the edge of the basin as natural=coastline. 
 
I would do this by removing the section of park boundary crossing the water by Jubilee Bridge between nodes 660565513 and 660565885 (snip each end where it meets the coastline and delete the bit in between). Then snip the coastline at the same 2 nodes. You will then have 2 ways that enclose the narrow C-shaped strip of park - the park boundary round the outside and a section of coastline round the inside. Then create a relation of type multipolygon (tagged as a park) and add the 2 ways to it - you have then created an area bounded by 2 different ways on the same layer as the sea. 
 
You lose the fact that the basin itself is part of the park, but I'm not sure how important that is. 		 	   		  
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