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> -Original Message-
> From: Peter J Halls [mailto:p.ha...@york.ac.uk]
> Sent: 28 January 2010 07:25
> To: Smart, Gary
> Cc: gdal-dev@lists.osgeo.org
> Subject: Re: [gdal-dev] Re-aligning maps from grid north to true north
>
> Gary,
>
> what do you mean by
Gary,
what do you mean by 'true north'?
OSGB36 is a Transverse Mercator projection: it is, therefore, automatically
aligned with a (reference) line of longitude, its central meridian. It is not
aligned to magnetic north: those little diagrams on the maps show the offset to
magnetic nor
On Thu, Jan 28, 2010 at 2:01 AM, Smart, Gary wrote:
> We have tif maps which are OSGB grid aligned, but we need them aligned to
> true-north. I presume this could be achieved by gdalwarp. Can anyone give
> me a clue how to do this? Am I right in thinking that simply setting the
> correct s_srs
We have tif maps which are OSGB grid aligned, but we need them aligned
to true-north. I presume this could be achieved by gdalwarp. Can
anyone give me a clue how to do this? Am I right in thinking that
simply setting the correct s_srs and t_srs would achieve everything I
need? If so - what part
