[OSM-dev] Coastlines and water - contact and technical

[Ben Supnik]

Hi Jon,

Jon Burgess wrote:

> - Relations with a name= tag. The Wiki says they should be entirely
> untagged. If the osm2pgsql code saw even a name tag on the relation then
> it would ignore the tags on the outer ring. The recent code now looks at
> the outer ring tags even if the relation has a name (it seems the
> editors are encouraging people to put name tags on the relation to make
> them easier to identify).

So to confirm:

... if a user incorrectly tries to make a lake by creating a 
multipolygon and putting the water-related attribute (e.g. landuse=water 
or natural=lake) on the relation and __not__ at least one outer polygon

... then pgsql will create a polygon without those water tags.

(Basically I am trying to figure out how broken the raw data could be 
and still see blue in the map. :-)

cheers
ben

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