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# (C) British Crown Copyright 2011 - 2018, Met Office
#
# This file is part of cartopy.
#
# cartopy is free software: you can redistribute it and/or modify it under
# the terms of the GNU Lesser General Public License as published by the
# Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# cartopy is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with cartopy. If not, see <https://www.gnu.org/licenses/>.
from __future__ import (absolute_import, division, print_function)
import types
import numpy as np
from numpy.testing import assert_array_almost_equal as assert_arr_almost
import pytest
import shapely.geometry as sgeom
import cartopy.crs as ccrs
import cartopy.io.img_tiles as cimgt
#: Maps Google tile coordinates to native mercator coordinates as defined
#: by https://goo.gl/pgJi.
KNOWN_EXTENTS = {(0, 0, 0): (-20037508.342789244, 20037508.342789244,
-20037508.342789244, 20037508.342789244),
(2, 0, 2): (0., 10018754.17139462,
10018754.17139462, 20037508.342789244),
(0, 2, 2): (-20037508.342789244, -10018754.171394622,
-10018754.171394622, 0),
(2, 2, 2): (0, 10018754.17139462,
-10018754.171394622, 0),
(8, 9, 4): (0, 2504688.542848654,
-5009377.085697312, -2504688.542848654),
}
if ccrs.PROJ4_VERSION == (5, 0, 0):
KNOWN_EXTENTS = {
(0, 0, 0): (-20037508.342789244, 20037508.342789244,
-19994827.892149, 19994827.892149),
(2, 0, 2): (0, 10018754.171395,
9997413.946075, 19994827.892149),
(0, 2, 2): (-20037508.342789244, -10018754.171394622,
-9997413.946075, 0),
(2, 2, 2): (0, 10018754.171395,
-9997413.946075, 0),
(8, 9, 4): (0, 2504688.542849,
-4998706.973037, -2499353.486519),
}
def GOOGLE_IMAGE_URL_REPLACEMENT(self, tile):
url = ('https://chart.googleapis.com/chart?chst=d_text_outline&'
'chs=256x256&chf=bg,s,00000055&chld=FFFFFF|16|h|000000|b||||'
'Google:%20%20(' + str(tile[0]) + ',' + str(tile[1]) + ')'
'|Zoom%20' + str(tile[2]) + '||||||______________________'
'______')
return url
def test_google_tile_styles():
"""
Tests that setting the Google Maps tile style works as expected.
This is essentially just assures information is properly propagated through
the class structure.
"""
reference_url = ("https://mts0.google.com/vt/lyrs={style}@177000000&hl=en"
"&src=api&x=1&y=2&z=3&s=G")
tile = ["1", "2", "3"]
# Default is street.
gt = cimgt.GoogleTiles()
url = gt._image_url(tile)
assert reference_url.format(style="m") == url
# Street
gt = cimgt.GoogleTiles(style="street")
url = gt._image_url(tile)
assert reference_url.format(style="m") == url
# Satellite
gt = cimgt.GoogleTiles(style="satellite")
url = gt._image_url(tile)
assert reference_url.format(style="s") == url
# Terrain
gt = cimgt.GoogleTiles(style="terrain")
url = gt._image_url(tile)
assert reference_url.format(style="t") == url
# Streets only
gt = cimgt.GoogleTiles(style="only_streets")
url = gt._image_url(tile)
assert reference_url.format(style="h") == url
# Exception is raised if unknown style is passed.
with pytest.raises(ValueError):
cimgt.GoogleTiles(style="random_style")
def test_google_wts():
gt = cimgt.GoogleTiles()
ll_target_domain = sgeom.box(-15, 50, 0, 60)
multi_poly = gt.crs.project_geometry(ll_target_domain, ccrs.PlateCarree())
target_domain = multi_poly.geoms[0]
with pytest.raises(AssertionError):
list(gt.find_images(target_domain, -1))
assert (tuple(gt.find_images(target_domain, 0)) ==
((0, 0, 0),))
assert (tuple(gt.find_images(target_domain, 2)) ==
((1, 1, 2), (2, 1, 2)))
assert (list(gt.subtiles((0, 0, 0))) ==
[(0, 0, 1), (0, 1, 1), (1, 0, 1), (1, 1, 1)])
assert (list(gt.subtiles((1, 0, 1))) ==
[(2, 0, 2), (2, 1, 2), (3, 0, 2), (3, 1, 2)])
with pytest.raises(AssertionError):
gt.tileextent((0, 1, 0))
assert_arr_almost(gt.tileextent((0, 0, 0)), KNOWN_EXTENTS[(0, 0, 0)])
assert_arr_almost(gt.tileextent((2, 0, 2)), KNOWN_EXTENTS[(2, 0, 2)])
assert_arr_almost(gt.tileextent((0, 2, 2)), KNOWN_EXTENTS[(0, 2, 2)])
assert_arr_almost(gt.tileextent((2, 2, 2)), KNOWN_EXTENTS[(2, 2, 2)])
assert_arr_almost(gt.tileextent((8, 9, 4)), KNOWN_EXTENTS[(8, 9, 4)])
def test_tile_bbox_y0_at_south_pole():
tms = cimgt.MapQuestOpenAerial()
# Check the y0_at_north_pole keywords returns the appropriate bounds.
assert_arr_almost(tms.tile_bbox(8, 6, 4, y0_at_north_pole=False),
np.array(KNOWN_EXTENTS[(8, 9, 4)]).reshape([2, 2]))
def test_tile_find_images():
gt = cimgt.GoogleTiles()
# Test the find_images method on a GoogleTiles instance.
ll_target_domain = sgeom.box(-10, 50, 10, 60)
multi_poly = gt.crs.project_geometry(ll_target_domain, ccrs.PlateCarree())
target_domain = multi_poly.geoms[0]
assert (list(gt.find_images(target_domain, 4)) ==
[(7, 4, 4), (7, 5, 4), (8, 4, 4), (8, 5, 4)])
@pytest.mark.network
def test_image_for_domain():
gt = cimgt.GoogleTiles()
gt._image_url = types.MethodType(GOOGLE_IMAGE_URL_REPLACEMENT, gt)
ll_target_domain = sgeom.box(-10, 50, 10, 60)
multi_poly = gt.crs.project_geometry(ll_target_domain, ccrs.PlateCarree())
target_domain = multi_poly.geoms[0]
_, extent, _ = gt.image_for_domain(target_domain, 6)
ll_extent = ccrs.Geodetic().transform_points(gt.crs,
np.array(extent[:2]),
np.array(extent[2:]))
if ccrs.PROJ4_VERSION == (5, 0, 0):
assert_arr_almost(ll_extent[:, :2],
[[-11.25, 49.033955],
[11.25, 61.687101]])
else:
assert_arr_almost(ll_extent[:, :2],
[[-11.25, 48.92249926],
[11.25, 61.60639637]])
def test_quadtree_wts():
qt = cimgt.QuadtreeTiles()
ll_target_domain = sgeom.box(-15, 50, 0, 60)
multi_poly = qt.crs.project_geometry(ll_target_domain, ccrs.PlateCarree())
target_domain = multi_poly.geoms[0]
with pytest.raises(ValueError):
list(qt.find_images(target_domain, 0))
assert qt.tms_to_quadkey((1, 1, 1)) == '1'
assert qt.quadkey_to_tms('1') == (1, 1, 1)
assert qt.tms_to_quadkey((8, 9, 4)) == '1220'
assert qt.quadkey_to_tms('1220') == (8, 9, 4)
assert tuple(qt.find_images(target_domain, 1)) == ('0', '1')
assert tuple(qt.find_images(target_domain, 2)) == ('03', '12')
assert list(qt.subtiles('0')) == ['00', '01', '02', '03']
assert list(qt.subtiles('11')) == ['110', '111', '112', '113']
with pytest.raises(ValueError):
qt.tileextent('4')
assert_arr_almost(qt.tileextent(''), KNOWN_EXTENTS[(0, 0, 0)])
assert_arr_almost(qt.tileextent(qt.tms_to_quadkey((2, 0, 2), google=True)),
KNOWN_EXTENTS[(2, 0, 2)])
assert_arr_almost(qt.tileextent(qt.tms_to_quadkey((0, 2, 2), google=True)),
KNOWN_EXTENTS[(0, 2, 2)])
assert_arr_almost(qt.tileextent(qt.tms_to_quadkey((2, 0, 2), google=True)),
KNOWN_EXTENTS[(2, 0, 2)])
assert_arr_almost(qt.tileextent(qt.tms_to_quadkey((2, 2, 2), google=True)),
KNOWN_EXTENTS[(2, 2, 2)])
assert_arr_almost(qt.tileextent(qt.tms_to_quadkey((8, 9, 4), google=True)),
KNOWN_EXTENTS[(8, 9, 4)])
def test_mapbox_tiles_api_url():
token = 'foo'
map_name = 'bar'
tile = [0, 1, 2]
exp_url = ('https://api.mapbox.com/v4/mapbox.bar'
'/2/0/1.png?access_token=foo')
mapbox_sample = cimgt.MapboxTiles(token, map_name)
url_str = mapbox_sample._image_url(tile)
assert url_str == exp_url
def test_mapbox_style_tiles_api_url():
token = 'foo'
username = 'baz'
map_id = 'bar'
tile = [0, 1, 2]
exp_url = ('https://api.mapbox.com/styles/v1/'
'baz/bar/tiles/256/2/0/1'
'?access_token=foo')
mapbox_sample = cimgt.MapboxStyleTiles(token, username, map_id)
url_str = mapbox_sample._image_url(tile)
assert url_str == exp_url
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