[Proj] Setting up a proj4 specification

[Jean-Claude Repetto]

Le 19/10/2011 09:03, Hanlie Pretorius a écrit :
> Hi,
>
> Can someone please tell me or point me to documentation that explains
> how to put the following information into a proj4 string for use in
> QGIS?
>
> Datum:
> D_Arc_1960
> Spheroid:
> Clarke_1880_RGS
> Semimajor Axis:
> 6378249.144999999600000000
> Semiminor Axis:
> 6356514.869549775500000000
> Inverse Flattening:
> 293.46630000
> False_Easting
> 500000.000000000000000000
> False_Northing
> 0.000000000000000000
> Central_Meridian
> 33.000000000000000000
> Scale_Factor
> 0.999600000000000040
> Latitude_Of_Origin
> 0.000000000000000000
>
> Thanks
> Hanlie

Hi,

This information is not sufficient. It does not specify the projection. 
It may be UTM, or Lambert Conformal Conic, or other ones.
The parameters of the datum transformation to WGS84 are also missing.

The documentation on the proj4 parameters can be found at 
http://trac.osgeo.org/proj/wiki/GenParms .

Jean-Claude