On Mon, 2008-10-27 at 13:45 -0500, Warren Vick wrote:
> Lat/Lon (WGS-84) -> Spherical Mercator.

That is not enough information. Can you provide the exact proj srs
strings.

> Errors introduced by forward/reverse projections seem very plausible,
> although the generate_tiles.py only seems to do a forward. I wonder if a
> better implementation of the GoogleProjection.fromLLtoPixel() method
> would do the trick?

Mapnik does some reverse projections internally.

        Jon


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