On 27-12-2012 19:22, Even Rouault wrote:
Le jeudi 27 décembre 2012 20:14:40, Andrew Smith a écrit :
Hi,
I am trying to use gdal_grid to interpolate some data and I am having
trouble making gdal_grid treat spatial data (WGS84 lat/lon coordinates) as
points on a continuous plane. It seems to be ignoring the dateline so for
example values at 45, 179 are not properly interacting with values at 45,
-179 and so on. I'm using the following gdal_grid command:
Yes gdal_grid is completely unaware of dateline issues. One way to fix this is
to duplicate the lines of your csv file by adding 360 to the longitude of the
original lines.
GMT is well aware that the Earth is round and will take care of this
problem. If you are creating a grid (floats) try 'surface' or one of the
other interpolator.
Joaquim
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