[mapserver-users] Fwd: Need some ideas for mosaic'ing raster data that spans the dateline

[Roger André]

cross-posting to MapServer list.

Roger


---------- Forwarded message ----------
From: Roger André <randre at gmail.com>
Date: Mon, Oct 19, 2009 at 3:16 PM
Subject: Need some ideas for mosaic'ing raster data that spans the dateline
To: gdal-dev <gdal-dev at lists.osgeo.org>


I need to create a colored raster that shows data intensity over
Russia.  My data is in 2 pieces, one on each side of the dateline, and
in WGS84 projection.  What I would like to do is create a shifted
lat/lon projection, such that when both pieces are stuck together, all
of russia can be represented.  I'm pretty sure I can get everything to
line up correctly in GIMP to create a mosaic, but I'm drawing a blank
as to how I can define the shifted projection.  I'd like to use the
projection in Mapserver afterwards for display too.

Can someone send me a thumbnail sketch of how to do this, preferrably
with some proj parameters, please?

Thanks,

Roger