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/****************************************************************************/
/* */
/* ./grid/kkj.c - Convert to and from KKJ Grid Format */
/* */
/* This file is part of gpstrans - a program to communicate with garmin gps */
/* Parts are taken from John F. Waers (jfwaers@csn.net) program MacGPS. */
/* */
/* */
/* Copyright (c) 1995 by Carsten Tschach (tschach@zedat.fu-berlin.de) */
/* Copyright (c) 1996 by Janne Sinkkonen (janne@iki.fi) */
/* */
/* Permission to use, copy, modify, and distribute this software and its */
/* documentation for non-commercial purpose, is hereby granted without fee, */
/* providing that the copyright notice appear in all copies and that both */
/* the copyright notice and this permission notice appear in supporting */
/* documentation. I make no representations about the suitability of this */
/* software for any purpose. It is provides "as is" without express or */
/* implid warranty. */
/* */
/****************************************************************************/
#include "defs.h"
#include "Garmin.h"
#include <math.h>
/* define constants */
static const double lat0 = 0.0; /* reference transverse mercator latitude */
static const double lon0 = 27.0;
static const double k0 = 1.0;
/****************************************************************************/
/* Convert degree to KKJ Grid. */
/****************************************************************************/
void DegToKKJ(double lat, double lon, char *zone, double *x, double *y)
{
char nz;
sprintf(zone, "27E");
toTM(lat, lon, lat0, lon0, k0, x, y);
/* false easting */
*x = *x + 500000.0;
}
/****************************************************************************/
/* Convert KKJ Grid to degree. */
/****************************************************************************/
void KKJtoDeg(short zone, short southernHemisphere, double x, double y,
double *lat, double *lon)
{
double lon0;
x -= 500000.0;
fromTM(x, y, lat0, lon0, k0, lat, lon);
}
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