[Tile-serving] [osm2pgsql] Recommend -G flag for multipolygons (#36)

[pnorman]

Relations with multiple members like http://www.openstreetmap.org/?lat=57.011&lon=-6.428&zoom=10&layers=M are rendered multiple times and are a bit of a cartographic disaster.

One possible fix is to import with osm2pgsql in -G mode to create a MULTIPOLYGON instead of multiple POLYGONs. @springmeyer informs me that mapnik should render the label on just the largest POLYGON within the MULTIPOLYGON by default. 

Do we know anyone running with -G?

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Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/osm2pgsql/issues/36
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