Christian, thanks, this make perfect sense now. eager to test when you get the support for non-closed coastlines. apo On Aug 2, 2009, at 8:32 AM, Christian Gawron wrote:
Dear Apollinaris,
this is a misunderstanding.
I use the relation internally: The code right now creates a relation with the sea as "outer" and the (closed) coastline segments as "inner" members. This way I don't have to think about how to "punch the holes" into the sea. What is still missing is the handling of non-closed coastline segments - these have to be added to the "outer" polygon.
There is no need for a relation in the raw data.
Best wishes Christian
Apollinaris Schoell schrieb:
this is really great to get sea polygons. makes maps really much better Don't understand why is there a need for relations? is it common to have relations for coastline? have never seen it. my understanding is the right side of the way is sea, left side is land. how can the knowledge of inner way help here except in the case of an island where you have the whole closed polygon available to make a decision. it's nearly impossible to build a relation for a whole continent. due to restriction in relation members you would need parent relations collecting all pieces. and when done all coastlines will be inner elements. there can't be an outer element except you extend the definition to leave earth
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