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1 #include <u.h>2 #include <libc.h>3 #include "map.h"5 int6 Xazequalarea(struct place *place, double *x, double *y)7 {8 double r;9 r = sqrt(1. - place->nlat.s);10 *x = - r * place->wlon.s;11 *y = - r * place->wlon.c;12 return(1);13 }15 proj16 azequalarea(void)17 {18 return(Xazequalarea);19 }