Keywords: gildas-prog

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## GR8_SYSTEM - GR8_PROJEC

`GR8_SYSTEM (ICODE)`

`GR8_PROJEC (X,Y,A,ICODE)`

Define respectively the coordinate projection system and the projection constants. The `SYSTEM` code can be 1 for `UNKNOWN`, 2 for `EQUATORIAL (1950.0)`, 3 for `GALACTIC`. The projection code is 0 for `NONE`, 1 for `GNOMONIC`, 2 for `ORTHOGRAPHIC`, 3 for `AZIMUTHAL`, 4 for `STEREOGRAPHIC`, 5 for `LAMBERT` cylindrical, 6 for `AITOFF` equal area and 7 for `RADIO` (also known as global SINUSOIDAL) projection.

    Arguments :
            ICODE   INTEGER         Input
            X       REAL            Input        Projection center
            Y       REAL            Input        Projection center
            A       REAL            Input        Projection Angle