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Sourcecode: r-cran-mapproj version File versions  Download package

cylequalarea.c

/* RSB #include <u.h>
#include <libc.h>*/
#include "map.h"

static double a;

static int
Xcylequalarea(struct place *place, double *x, double *y)
{
      *x = - place->wlon.l * a;
      *y = place->nlat.s;
      return(1);
}

proj
cylequalarea(double par)
{
      struct coord stdp0;
      if(par > 89.0)
            return(0);
      deg2rad(par, &stdp0);
      a = stdp0.c*stdp0.c;
      return(Xcylequalarea);
}

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