[Tile-serving] [osm2pgsql] Excluding linestrings from polygon tables with multi backend (#270)

[Paul Norman]

So, after thinking about it and writing some multi-backend transforms, I think unclosed ways that the transform indicates are an area should not make it into the polygon table.

With the pgsql backend, it's important as `waterway` is an area key and otherwise you'd never get rivers to the line table.

With a multi-backend, the idea of the same tagging leading to an object being a line or area based on geometry is not useful, as you can differentiate between `waterway=river` and `waterway=riverbank`

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Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/osm2pgsql/issues/270#issuecomment-148895008
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