Damiano,
No, Mapnik does not read from the .prj file AFAIK.
Dane
On Dec 2, 2008, at 9:17 AM, Damiano Morosi wrote:
One more question: did Mapnik use the .prj file when reading shape
files? And how?
2008/12/2 Damiano Morosi <[EMAIL PROTECTED]>
Hi,
another hint: if I remove all the srs from the mapfile, the tiles
are generated CORRECTLY while Dane said that the result should be
something screwy... The only thing that doesn't work here are the
scale based rules. I think that Mapnik ignore what the measure unit
is, so it cannot calculate the scale correctly. Maybe introducing a
unit="..." param for the map should be a good thing?
2008/12/1 Robert Coup <[EMAIL PROTECTED]>
I would assume Proj4 does a no-op if the source and destination SRSs
were the same, but maybe it doesn't. If it's reprojecting, it does
some reasonably complex calcuations on every vertex of every
geometry, which would explain the added time.
In https://trac.mapnik.org/ticket/138 I added a no-op around not
calculating extents for same-SRS map/layers, but maybe
proj_transform should do a similar no-op rather than pass it through
to Proj4?
Rob :)
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