On 17-1-2011 20:55, Frederik Ramm wrote:
It will certainly be stored in the DB because osm2pgsql does not know
about rendering rules. Plus, there it at least one query in the standard
rendering rules that will actually *retrieve* such a polygon and return
it to the Mapnik library for processing (where it will then be discarded):
It will not be discarded if it has a name=* ! :-)
Also, mapnik does a cheap bbox intersect to see which objects are likely
to be in the tile to be rendered, instead of an expensive intersect.
Depending on the size and position of your sea polygons, its bbox and
the bbox of the tile being rendered could overlap even for tiles far inland.
--
Lennard
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