mirror of
https://github.com/paparazzi/paparazzi.git
synced 2026-05-09 22:49:53 +08:00
Felix Ruess
81 lines
1.9 KiB
C
81 lines
1.9 KiB
C
/*
|
|
http://modestmaps.mapstraction.com/trac/wiki/TileNamingConventions
|
|
http://www.maptiler.org/google-maps-coordinates-tile-bounds-projection/
|
|
http://wiki.openstreetmap.org/wiki/Slippy_map_tilenames3
|
|
|
|
gcc osm.c -lm -Wall -o osm
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <math.h>
|
|
|
|
int long2tile(double lon, int z)
|
|
{
|
|
return (int)(floor((lon + 180.0) / 360.0 * pow(2.0, z)));
|
|
}
|
|
|
|
int lat2tile(double lat, int z)
|
|
{
|
|
return (int)(floor((1.0 - log( tan(lat * M_PI/180.0) + 1.0 / cos(lat * M_PI/180.0)) / M_PI) / 2.0 * pow(2.0, z)));
|
|
}
|
|
|
|
void gm_quadtree(int x, int y, int z, char *buffer)
|
|
{
|
|
static const char *const quadrant = "qrts";
|
|
int i;
|
|
char *ptr = buffer;
|
|
|
|
*ptr++ = 't';
|
|
for (i = z-1; i >= 0; i--)
|
|
{
|
|
int xbit = (x >> i) & 1;
|
|
int ybit = (y >> i) & 1;
|
|
*ptr++ = quadrant[xbit + 2 * ybit];
|
|
}
|
|
*ptr++ = '\0';
|
|
}
|
|
|
|
void ms_quadtree(int x, int y, int z, char *buffer)
|
|
{
|
|
int i;
|
|
char *ptr = buffer;
|
|
|
|
for (i = z; i > 0; i--)
|
|
{
|
|
int mask = 1 << (i - 1);
|
|
char digit = '0';
|
|
if ((x & mask) != 0)
|
|
{
|
|
digit+=1;
|
|
}
|
|
if ((y & mask) != 0)
|
|
{
|
|
digit+=2;
|
|
}
|
|
*ptr++ = digit;
|
|
}
|
|
*ptr++ = '\0';
|
|
}
|
|
|
|
int main(void)
|
|
{
|
|
int x, y, z = 14;
|
|
double lat = 52.26483, lon = 9.99394;
|
|
char ms_qkey[32];
|
|
char gm_qkey[32];
|
|
|
|
x = long2tile(lon, z);
|
|
y = lat2tile(lat, z);
|
|
ms_quadtree(x, y, z, ms_qkey);
|
|
gm_quadtree(x, y, z, gm_qkey);
|
|
|
|
printf("http://tile.openstreetmap.org/%d/%d/%d.png\n", z, x, y);
|
|
printf("http://khm0.google.com/kh/v=45&x=%d&s=&y=%d&z=%d\n", x, y, z);
|
|
// printf("http://kh.google.com/kh?v=3&t=%s\n", gm_qkey);
|
|
// printf("http://mt1.google.com/mt/v=ap.95&hl=en&x=%d&y=%d&z=%d&s=G\n", x, y, z);
|
|
printf("http://a0.ortho.tiles.virtualearth.net/tiles/a%s.jpeg?g=%d\n", ms_qkey, z+32);
|
|
printf("http://r0.ortho.tiles.virtualearth.net/tiles/r%s.png?g=%d\n", ms_qkey, z+32);
|
|
|
|
return(0);
|
|
};
|