(zoom, lat_deg, lon_deg)
| 31 | VERTICAL_OFFSET = -0.1 |
| 32 | |
| 33 | def deg2num(zoom, lat_deg, lon_deg): |
| 34 | lat_rad = math.radians(lat_deg) |
| 35 | n = 2.0 ** zoom |
| 36 | xtile = int((lon_deg + 180.0) / 360.0 * n) |
| 37 | ytile = int((1.0 - math.asinh(math.tan(lat_rad)) / math.pi) / 2.0 * n) |
| 38 | return (zoom, ytile, xtile) |
| 39 | |
| 40 | def num2deg(zoom, ytile, xtile): |
| 41 | n = 2.0 ** zoom |