Application: gvSIG desktop

/******************************************************************************

 * $Id: pj_latlong.c,v 1.2 2000/07/07 06:04:23 warmerda Exp $

 *

 * Project:  PROJ.4

 * Purpose:  Stub projection implementation for lat/long coordinates. We 

 *           don't actually change the coordinates, but we want proj=latlong

 *           to act sort of like a projection.

 * Author:   Frank Warmerdam, warmerda@home.com

 *

 ******************************************************************************

 * Copyright (c) 2000, Frank Warmerdam

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and associated documentation files (the "Software"),

 * to deal in the Software without restriction, including without limitation

 * the rights to use, copy, modify, merge, publish, distribute, sublicense,

 * and/or sell copies of the Software, and to permit persons to whom the

 * Software is furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included

 * in all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS

 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL

 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER

 * DEALINGS IN THE SOFTWARE.

 ******************************************************************************

 *

 * $Log: pj_latlong.c,v $

 * Revision 1.2  2000/07/07 06:04:23  warmerda

 * added longlat alias

 *

 * Revision 1.1  2000/07/06 23:32:27  warmerda

 * New

 *

 */

/* very loosely based upon DMA code by Bradford W. Drew */

#define PJ_LIB__

#include        <projects.h>

PROJ_HEAD(latlong, "Lat/long (Geodetic)")  "\n\t";

PROJ_HEAD(longlat, "Lat/long (Geodetic)")  "\n\t";

FORWARD(forward);

        xy.x = lp.lam / P->a;

        xy.y = lp.phi / P->a;

        return xy;

}

INVERSE(inverse);

        lp.phi = xy.y * P->a;

        lp.lam = xy.x * P->a;

        return lp;

}

FREEUP; if (P) pj_dalloc(P); }

ENTRY0(latlong)

        P->is_latlong = 1;

        P->x0 = 0.0;

        P->y0 = 0.0;

        P->inv = inverse; P->fwd = forward;

ENDENTRY(P)

ENTRY0(longlat)

        P->is_latlong = 1;

        P->x0 = 0.0;

        P->y0 = 0.0;

        P->inv = inverse; P->fwd = forward;

ENDENTRY(P)