Hi Jim,
proj.4 (cs2cs) has a parameter to force lat long coords into a +-180 or 0-360
space by specifying the output central meridian.
>From the proj.4 changelog:
2006-10-12 Frank Warmerdam <warmer...@pobox.com>
* Added experimental +lon_wrap argument to set a "center point" for
longitude wrapping of longitude values coming out of pj_transform().
This defaults to zero, for +-180 but can also be set to 180 for 0-360. I don't
know if you can do the same with GDAL.
You also have the option of cropping the dataset to generate two images, one
each side of the dateline, and the one in the western hemisphere can be
assigned coords in the +-180 or 0-360 space as you see fit to render correctly
in your application.
I have done this routinely with MODIS imagery.
Cheers,
Brent Wood
--- On Thu, 9/1/11, Jim Bellenger <belle...@gmail.com> wrote:
From: Jim Bellenger <belle...@gmail.com>
Subject: [gdal-dev] What are the arguments to gdalwarp to cross the date line?
To: gdal-dev@lists.osgeo.org
Date: Thursday, September 1, 2011, 6:55 AM
Hello,
I have a Lambert Conformal Conic image that crosses the 180 dateline and I want
to gdalwarp to a latlong projection. The result image wraps around the globe
instead of just crossing the dateline. It seems to be a problem with the
western hemisphere because I have tried a "-te" option with both hemispheres
and the eastern (positive longitude) hemisphere works fine but not the western
hemisphere (negative longitude) always wraps around the globe. I have tried a
+over and +lon_wrap=180 arguments with no success.
Jim
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