[Tilecache] Empty pixel rows across bottom of certain tiles

[Roger André]

Ok, I think I've narrowed this down to being a reprojection problem.  My
source data is actually unprojected lat/lon raster data, with pixels that
are .025 x ,025 degrees in size.  I've set this to be EPSG:4326 in my
MapServer LAYER, and am specifying a spherical mercator reprojection to
EPSG:900913 via TileCache.  I figure I have either a problem in my source
projection, or in my output projection, with a slight suspicion that I might
be wrong in assigning EPSG:4326 to the source data.

Does this sound reasonable, and if so, can I define lat/lon geographic
without specifying an ellipsoid?
--

On 10/18/08, Roger André <randre at gmail.com> wrote:
>
> Hi Everyone,
>
> I've encountered something new that is perplexing me.  I'm seeding my cache
> and finding that certain tiles have a row of pixels missing at the bottom of
> the tile which is being filled with the background color I've set in my
> MAPFILE.  It looks suspiciously like TileCache is having to "split" my seed
> image in order to fit it into the Google Maps frame, which would indicate
> something wrong with my georeferencing - or extents setup, but I can't
> figure out what.  Is this a symptom that rings a bell with anyone?
>
> Thanks,
>
> Roger
> --
>
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