#include <u.h>#include <libc.h>#include "map.h" intXazequalarea(struct place *place, double *x, double *y){	double r;	r = sqrt(1. - place->nlat.s);	*x = - r * place->wlon.s;	*y = - r * place->wlon.c;	return(1);} projazequalarea(void){	return(Xazequalarea);}