1 float 2 deg2rad(float deg); 3 4 float 5 rad2deg(float rad); 6 7 int 8 lat2pixel( float zoom, 9 float lat); 10 11 int 12 lon2pixel( float zoom, 13 float lon); 14 15 float 16 pixel2lon( float zoom, 17 int pixel_x); 18 19 float 20 pixel2lat( float zoom, 21 int pixel_y); 22 char * 23 latdeg2latmin( float lat); 24 25 char * 26 londeg2lonmin( float lon); 27 28 char * 29 latdeg2latsec( float lat); 30 31 char * 32 londeg2lonsec( float lon); 33 34 float 35 get_bearing(double lat1, double lon1, double lat2, double lon2); 36 37 float 38 get_distance(double lat1, double lon1, double lat2, double lon2); 39 40 int 41 get_zoom_covering(int width, int height, double lat_max, double lon_min, double lat_min, double lon_max); 42