[Qgis-user] proj 4 use degrees instead of grad

[Julien Guilloux]

Hi list, 

I would like to generate a polygon grid. The coordinate system i need is the old French NTF (with grad unit and Paris as first meridian). 
No trouble, there is the espsg code: 4807. When looking description of 4807 in spatialrefsys, grad as unit are well indicate. So... all seem perfect.... but... 

When i generate the shape grid, i notice that proj 4 consider the unit as degrees and not as grad ! 
That why the location of my generate shape is not good, with a difference exactly egal to a 0.9 factor (a circle in grad is 400g, a circle in degrees is 360°, so 1 grad = 0.9 degree) 

Do proj 4 understand only degree coordinates ? 
i try to make a personnal SRID but no success... 

Thanks if you have any tip... 

So long, 
Julien 

		
	Julien-Pierre GUILLOUX 

Parc national des Écrins 
04 92 40 20 56 / 06 99 77 38 26 
[ http://www.ecrins-parcnational.fr/ | www.ecrins-parcnational.fr ] 




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