[Gdal-dev] Tool to convert shapefile from [-180, 180] to [0, 360] range

[Daniel Morissette]

Mateusz Loskot wrote:
> 
> I created small utility on basis of ogr2ogr according your needs, just
> for fun and practice :-)
> I attached it as a 180to360.cpp file, so it's a C++ application.
> I hope this attachement will not be cutted off by the gdal-dev mailer.
> It works only with shapefiles.
> 
> This utility just adds 180 to every x coordinate.
> So, it works well only if input coordinates are in range frm -180 to
> 180, but it does not check it.

Hi Mateusz,

Thanks for the little program, that's what I was thinking of doing too. 
In case anyone is interested, I have attached a new version that I 
modified it a little bit to:

1- Shift by +360 instead of +180. i.e. -50 degrees = +310 degrees
2- Shift coordinates only if the centroid of the source feature is in 
the [-180,0] range

One last thing to do would be support for geometries other than points 
(at least linestrings and polygons).

Daniel
-- 
Daniel Morissette
http://www.mapgears.com/
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