(zoom, ytile, xtile)
| 38 | return (zoom, ytile, xtile) |
| 39 | |
| 40 | def num2deg(zoom, ytile, xtile): |
| 41 | n = 2.0 ** zoom |
| 42 | lon_deg = xtile / n * 360.0 - 180.0 |
| 43 | lat_rad = math.atan(math.sinh(math.pi * (1 - 2 * ytile / n))) |
| 44 | lat_deg = math.degrees(lat_rad) |
| 45 | return (lat_deg, lon_deg) |
| 46 | |
| 47 | EARTH_RADIUS = 6378137.0 # in meters on the equator |
| 48 |