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"""
>>> p = Provider()
>>> p.getTileUrls(Coordinate(10, 13, 7))
('http://tile.openstreetmap.org/7/13/10.png',)
>>> p.getTileUrls(Coordinate(13, 10, 7))
('http://tile.openstreetmap.org/7/10/13.png',)
"""
from math import pi
from Core import Coordinate
from Geo import MercatorProjection, deriveTransformation
from Providers import IMapProvider
import Tiles
class Provider(IMapProvider):
def __init__(self):
# the spherical mercator world tile covers (-π, -π) to (π, π)
t = deriveTransformation(-pi, pi, 0, 0, pi, pi, 1, 0, -pi, -pi, 0, 1)
self.projection = MercatorProjection(0, t)
def tileWidth(self):
return 256
def tileHeight(self):
return 256
def getTileUrls(self, coordinate):
return ('http://tile.openstreetmap.org/%d/%d/%d.png' % (coordinate.zoom, coordinate.column, coordinate.row),)
if __name__ == '__main__':
import doctest
doctest.testmod()
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