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

[Ben Supnik]

Hi Jon,

Jon Burgess wrote:
> This is how the data appeared when the existing polygons with holes were
> run through the 0.4->0.5 conversion process. In 0.4 they consisted of a
> single tagged way with disjoint segments. In the conversion, the
> disjoint segments turned into multiple tagged ways and a relation was
> created with them all as members. The conversion process was not
> intelligent enough to assign them roles.

Does that create rendering errors?  (E.g. holes not being rendered as 
holes?)  Or are clients somehow figuring out that the holes are holes 
via a heuristic?

Sorry to beat this to death here...it looks like clients have to handle 
a number of special cases for legacy data...I want to make sure I get 
them all so that my shapefile output isn't grossly different from what 
users see on the map.

cheers
bne


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