[Qgis-developer] Re: [saga-gis-developer] saga - qgis interface

[Johan Van de Wauw]

On Sat, Feb 19, 2011 at 1:09 AM, Volker Wichmann <wichmann at laserdata.at> wrote:
> Hi Gianluca,

> Another issue which has to be solved is that of the "Grid System" parameter.
> As you most likely know, most of the SAGA grid modules require all grids to
> be processed within the same grid system. In case this is true for a module,
> I see two possibilities:
>
> (1) check this after you converted from GeoTiff to sgrd and before you call
> saga_cmd
>
> (2) leave the check to saga_cmd and catch the return error message
I think there is an even better 3d option: derive it from the geotiff
(or other) file. Unless you have one of those rare files which have
nonsquare grid cells, it is perfectly possible to derive the origin
and grid cell size.
A 4th approach is doing what sextante is doing afaik: resample the
grids if they don't match.