def test_tile_to_meters_one(self):
"""Test conversion from tile coordinate to meters."""
merc = Mercator()
z = x = y = 0
mx, my = merc.tile_to_meters(z, x, y)
mx = merc.truncate(mx)
my = merc.truncate(my)
assert float(mx) == -20037508.34 and \
float(my) == -20037508.34
def test_get_coord_one(self):
"""Test get coordinate from tile method."""
merc = Mercator()
z = x = y = 0
mx, my = merc.get_coord(z, x, y)
mx = merc.truncate(mx)
my = merc.truncate(my)
assert float(mx) == -20037508.34 and \
float(my) == -20037508.34
def test_tile_to_meters_two(self):
"""Test conversion with a different tile coord to meters."""
merc = Mercator()
z = 0
x = y = 1
mx, my = merc.tile_to_meters(z, x, y)
mx = merc.truncate(mx)
my = merc.truncate(my)
assert float(mx) == 20037508.34 and \
float(my) == 20037508.34
def test_tile_to_meters_three(self):
"""Test a random tile to meters."""
merc = Mercator()
z = 14
x = 11332
y = 9870
mx, my = merc.tile_to_meters(z, x, y)
mx = merc.truncate(mx)
my = merc.truncate(my)
assert float(mx) == 7680392.60 and \
float(my) == 4104362.67
def test_get_coord_two(self):
"""Test get coord with a random tile."""
merc = Mercator()
z = 14
x = 11332
y = 9870
mx, my = merc.get_coord(z, x, y)
mx = merc.truncate(mx)
my = merc.truncate(my)
assert float(mx) == 7680392.60 and \
float(my) == 4104362.67
def test_tile_to_meters_four(self):
"""Test another corner of a random tile to meters."""
merc = Mercator()
z = 14
x = 11333
y = 9871
mx, my = merc.tile_to_meters(z, x, y)
mx = merc.truncate(mx)
my = merc.truncate(my)
assert float(mx) == 7682838.58 and \
float(my) == 4106808.65
def test_tile_to_lat_lon_two(self):
"""Test the top right corner of zoom 0."""
z = 0
x = y = 1
lat, lon = Mercator.tile_to_lat_lon(z, x, y)
assert lon == 180.0 and lat == 85.0511287798066
z = 14
x = 11332
y = 9870
lat, lon = Mercator.tile_to_lat_lon(z, x, y)
assert lon == 68.994140625 and \
lat == 34.56085936708385
def test_tile_to_lat_lon_four(self):
"""Test a random tile to lat/lon."""
z = 14
x = 11333
y = 9871
lat, lon = Mercator.tile_to_lat_lon(z, x, y)
assert lon == 69.01611328125 and \
lat == 34.57895241036947
def test_invert_y_one(self):
"""Test inverted Y axis calculation."""
z = 1
y = 0
assert Mercator.invert_y(z, y) == 1
def test_invert_y_two(self):
"""Test a more complicated Y axis inversion."""
z = 13
y = 31
assert Mercator.invert_y(z, y) == 8160
def test_pixel_size(self):
"""Test pixel size calculation."""
z = randint(0, 21)
result = Mercator.pixel_size(z)
assert result * 2**z == 156543.033928041
def test_tile_to_lat_lon_one(self):
"""Test conversion from tile coordinate to lat/lon."""
z = x = y = 0
lat, lon = Mercator.tile_to_lat_lon(z, x, y)
assert lon == -180.0 and lat == -85.0511287798066
def test_invert_y_one(self):
"""Test inverted Y axis calculation."""
z = 1
y = 0
assert Mercator.invert_y(z, y) == 1
def test_tile_to_lat_lon_one(self):
"""Test conversion from tile coordinate to lat/lon."""
z = x = y = 0
lat, lon = Mercator.tile_to_lat_lon(z, x, y)
assert lon == -180.0 and lat == -85.0511287798066
def test_origin_shift(self):
"""Test origin shift calculation."""
merc = Mercator()
assert merc.origin_shift == pi * merc.radius
def test_radius(self):
"""Test radius for mercator."""
merc = Mercator()
assert merc.radius == 6378137
def test_tile_size(self):
"""Test tile size default."""
merc = Mercator()
assert merc.tile_size == 256
def test_truncate(self):
"""Test mercator accuracy truncation."""
merc = Mercator()
f = 1234.567890123
result = merc.truncate(f)
assert float(result) == 1234.56
def test_truncate(self):
"""Test mercator accuracy truncation."""
merc = Mercator()
f = 1234.567890123
result = merc.truncate(f)
assert float(result) == 1234.56
def test_invert_y_two(self):
"""Test a more complicated Y axis inversion."""
z = 13
y = 31
assert Mercator.invert_y(z, y) == 8160
def test_pixel_size(self):
"""Test pixel size calculation."""
z = randint(0, 21)
result = Mercator.pixel_size(z)
assert result * 2**z == 156543.033928041
def test_init_res(self):
"""Test initial resolution calculation."""
merc = Mercator()
assert merc.initial_resolution == 2 * \
merc.origin_shift / merc.tile_size