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/******************************************************************************
* 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, warmerdam@pobox.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.
*****************************************************************************/
/* very loosely based upon DMA code by Bradford W. Drew */
#define PJ_LIB__
#include "proj_internal.h"
#include "projects.h"
PROJ_HEAD(lonlat, "Lat/long (Geodetic)") "\n\t";
PROJ_HEAD(latlon, "Lat/long (Geodetic alias)") "\n\t";
PROJ_HEAD(latlong, "Lat/long (Geodetic alias)") "\n\t";
PROJ_HEAD(longlat, "Lat/long (Geodetic alias)") "\n\t";
static XY latlong_forward(LP lp, PJ *P) {
XY xy = {0.0,0.0};
(void) P;
xy.x = lp.lam;
xy.y = lp.phi;
return xy;
}
static LP latlong_inverse(XY xy, PJ *P) {
LP lp = {0.0,0.0};
(void) P;
lp.phi = xy.y;
lp.lam = xy.x;
return lp;
}
static XYZ latlong_forward_3d (LPZ lpz, PJ *P) {
XYZ xyz = {0,0,0};
(void) P;
xyz.x = lpz.lam;
xyz.y = lpz.phi;
xyz.z = lpz.z;
return xyz;
}
static LPZ latlong_inverse_3d (XYZ xyz, PJ *P) {
LPZ lpz = {0,0,0};
(void) P;
lpz.lam = xyz.x;
lpz.phi = xyz.y;
lpz.z = xyz.z;
return lpz;
}
static PJ_COORD latlong_forward_4d (PJ_COORD obs, PJ *P) {
(void) P;
return obs;
}
static PJ_COORD latlong_inverse_4d (PJ_COORD obs, PJ *P) {
(void) P;
return obs;
}
static PJ *latlong_setup (PJ *P) {
P->is_latlong = 1;
P->x0 = 0;
P->y0 = 0;
P->inv = latlong_inverse;
P->fwd = latlong_forward;
P->inv3d = latlong_inverse_3d;
P->fwd3d = latlong_forward_3d;
P->inv4d = latlong_inverse_4d;
P->fwd4d = latlong_forward_4d;
P->left = PJ_IO_UNITS_ANGULAR;
P->right = PJ_IO_UNITS_ANGULAR;
return P;
}
PJ *PROJECTION(latlong) {
return latlong_setup (P);
}
PJ *PROJECTION(longlat) {
return latlong_setup (P);
}
PJ *PROJECTION(latlon) {
return latlong_setup (P);
}
PJ *PROJECTION(lonlat) {
return latlong_setup (P);
}
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