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# Copyright Crown and Cartopy Contributors
#
# This file is part of Cartopy and is released under the BSD 3-clause license.
# See LICENSE in the root of the repository for full licensing details.
import matplotlib.pyplot as plt
import pytest
import cartopy.crs as ccrs
from cartopy.mpl.ticker import LatitudeFormatter, LongitudeFormatter
@pytest.mark.natural_earth
@pytest.mark.mpl_image_compare(filename='xticks_no_transform.png')
def test_set_xticks_no_transform():
ax = plt.axes(projection=ccrs.PlateCarree())
ax.coastlines('110m')
ax.xaxis.set_major_formatter(LongitudeFormatter(degree_symbol=''))
ax.set_xticks([-180, -90, 0, 90, 180])
ax.set_xticks([-135, -45, 45, 135], minor=True)
return ax.figure
@pytest.mark.natural_earth
@pytest.mark.mpl_image_compare(filename='xticks_cylindrical.png')
def test_set_xticks_cylindrical():
ax = plt.axes(projection=ccrs.Mercator(min_latitude=-85, max_latitude=85))
ax.coastlines('110m')
ax.xaxis.set_major_formatter(LongitudeFormatter(degree_symbol=''))
ax.set_xticks([-180, -90, 0, 90, 180], crs=ccrs.PlateCarree())
ax.set_xticks([-135, -45, 45, 135], minor=True, crs=ccrs.PlateCarree())
return ax.figure
def test_set_xticks_non_cylindrical():
ax = plt.axes(projection=ccrs.Orthographic())
with pytest.raises(RuntimeError):
ax.set_xticks([-180, -90, 0, 90, 180], crs=ccrs.Geodetic())
with pytest.raises(RuntimeError):
ax.set_xticks([-135, -45, 45, 135], minor=True, crs=ccrs.Geodetic())
@pytest.mark.natural_earth
@pytest.mark.mpl_image_compare(filename='yticks_no_transform.png')
def test_set_yticks_no_transform():
ax = plt.axes(projection=ccrs.PlateCarree())
ax.coastlines('110m')
ax.yaxis.set_major_formatter(LatitudeFormatter(degree_symbol=''))
ax.set_yticks([-60, -30, 0, 30, 60])
ax.set_yticks([-75, -45, -15, 15, 45, 75], minor=True)
return ax.figure
@pytest.mark.natural_earth
@pytest.mark.mpl_image_compare(filename='yticks_cylindrical.png')
def test_set_yticks_cylindrical():
ax = plt.axes(projection=ccrs.Mercator(min_latitude=-85, max_latitude=85))
ax.coastlines('110m')
ax.yaxis.set_major_formatter(LatitudeFormatter(degree_symbol=''))
ax.set_yticks([-60, -30, 0, 30, 60], crs=ccrs.PlateCarree())
ax.set_yticks([-75, -45, -15, 15, 45, 75], minor=True,
crs=ccrs.PlateCarree())
return ax.figure
def test_set_yticks_non_cylindrical():
ax = plt.axes(projection=ccrs.Orthographic())
with pytest.raises(RuntimeError):
ax.set_yticks([-60, -30, 0, 30, 60], crs=ccrs.Geodetic())
with pytest.raises(RuntimeError):
ax.set_yticks([-75, -45, -15, 15, 45, 75], minor=True,
crs=ccrs.Geodetic())
@pytest.mark.natural_earth
@pytest.mark.mpl_image_compare(filename='xyticks.png')
def test_set_xyticks():
fig = plt.figure(figsize=(10, 10))
projections = (ccrs.PlateCarree(),
ccrs.Mercator(),
ccrs.TransverseMercator(approx=False))
x = -3.275024
y = 50.753998
for i, prj in enumerate(projections, 1):
ax = fig.add_subplot(3, 1, i, projection=prj)
ax.set_extent([-12.5, 4, 49, 60], ccrs.Geodetic())
ax.coastlines('110m')
p, q = prj.transform_point(x, y, ccrs.Geodetic())
ax.set_xticks([p])
ax.set_yticks([q])
return fig
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