def test_igh_ocean():
crs = ccrs.InterruptedGoodeHomolosine(central_longitude=-160,
emphasis="ocean")
ax = plt.axes(projection=crs)
ax.coastlines()
ax.gridlines()
return ax.figure
def main():
ax = plt.axes(projection=ccrs.InterruptedGoodeHomolosine())
ax.coastlines()
ax.add_wms(wms='http://vmap0.tiles.osgeo.org/wms/vmap0', layers=['basic'])
plt.show()
def main():
fig = plt.figure(figsize=(10, 5))
ax = fig.add_subplot(1, 1, 1, projection=ccrs.InterruptedGoodeHomolosine())
ax.coastlines()
ax.add_wms(wms='http://vmap0.tiles.osgeo.org/wms/vmap0', layers=['basic'])
plt.show()
def igh_plot():
import matplotlib.pyplot as plt
import cartopy.crs as ccrs
fig = plt.figure(figsize=(6.9228, 6))
ax1 = fig.add_subplot(2, 1, 1,
projection=ccrs.InterruptedGoodeHomolosine(
emphasis='land'))
ax1.coastlines(resolution='110m')
ax1.gridlines()
ax2 = fig.add_subplot(2, 1, 2,
projection=ccrs.InterruptedGoodeHomolosine(
central_longitude=-160, emphasis='ocean'))
ax2.coastlines(resolution='110m')
ax2.gridlines()
def test_eccentric_globe():
globe = ccrs.Globe(semimajor_axis=1000, semiminor_axis=500, ellipse=None)
igh = ccrs.InterruptedGoodeHomolosine(globe=globe)
other_args = {'a=1000', 'b=500', 'lon_0=0'}
check_proj4_params(igh, other_args)
assert_almost_equal(np.array(igh.x_limits), [-3141.5926536, 3141.5926536])
assert_almost_equal(np.array(igh.y_limits), [-1361.410035, 1361.410035])
def test_default():
igh = ccrs.InterruptedGoodeHomolosine()
other_args = {'ellps=WGS84', 'lon_0=0'}
check_proj_params('igh', igh, other_args)
assert_almost_equal(np.array(igh.x_limits),
[-20037508.3427892, 20037508.3427892])
assert_almost_equal(np.array(igh.y_limits),
[-8683259.7164347, 8683259.7164347])
def test_central_longitude(lon):
igh = ccrs.InterruptedGoodeHomolosine(central_longitude=lon)
other_args = {'ellps=WGS84', 'lon_0={}'.format(lon)}
check_proj_params('igh', igh, other_args)
assert_almost_equal(np.array(igh.x_limits),
[-20037508.3427892, 20037508.3427892],
decimal=5)
assert_almost_equal(np.array(igh.y_limits),
[-8683259.7164347, 8683259.7164347])
def test_eccentric_globe(emphasis):
globe = ccrs.Globe(semimajor_axis=1000, semiminor_axis=500, ellipse=None)
igh = ccrs.InterruptedGoodeHomolosine(globe=globe, emphasis=emphasis)
other_args = {"a=1000", "b=500", "lon_0=0"}
if emphasis == "land":
check_proj_params("igh", igh, other_args)
elif emphasis == "ocean":
check_proj_params("igh_o", igh, other_args)
assert_almost_equal(np.array(igh.x_limits), [-3141.5926536, 3141.5926536])
assert_almost_equal(np.array(igh.y_limits), [-1361.410035, 1361.410035])
def test_pcolormesh_goode_wrap():
# global data on an Interrupted Goode Homolosine projection
# shouldn't spill outside projection boundary
x = np.linspace(0, 360, 73)
y = np.linspace(-87.5, 87.5, 36)
X, Y = np.meshgrid(*[np.deg2rad(c) for c in (x, y)])
Z = np.cos(Y) + 0.375 * np.sin(2. * X)
Z = Z[:-1, :-1]
ax = plt.axes(projection=ccrs.InterruptedGoodeHomolosine())
ax.coastlines()
ax.pcolormesh(x, y, Z, transform=ccrs.PlateCarree())
def test_default(emphasis):
if emphasis == "ocean" and ccrs.PROJ4_VERSION < (7, 1, 0):
pytest.skip()
igh = ccrs.InterruptedGoodeHomolosine(emphasis=emphasis)
other_args = {"ellps=WGS84", "lon_0=0"}
if emphasis == "land":
check_proj_params("igh", igh, other_args)
elif emphasis == "ocean":
check_proj_params("igh_o", igh, other_args)
assert_almost_equal(np.array(igh.x_limits),
[-20037508.3427892, 20037508.3427892])
assert_almost_equal(np.array(igh.y_limits),
[-8683259.7164347, 8683259.7164347])
def test_pcolormesh_goode_wrap():
# global data on an Interrupted Goode Homolosine projection
# shouldn't spill outside projection boundary
x = np.linspace(0, 360, 73)
y = np.linspace(-87.5, 87.5, 36)
X, Y = np.meshgrid(*[np.deg2rad(c) for c in (x, y)])
Z = np.cos(Y) + 0.375 * np.sin(2. * X)
Z = Z[:-1, :-1]
ax = plt.axes(projection=ccrs.InterruptedGoodeHomolosine(emphasis='land'))
ax.coastlines()
# TODO: Remove snap when updating this image
ax.pcolormesh(x, y, Z, transform=ccrs.PlateCarree(), snap=False)
return ax.figure
def main():
rotated_crs = ccrs.RotatedPole(pole_longitude=120.0, pole_latitude=70.0)
ax0 = plt.axes(projection=rotated_crs)
ax0.set_extent([-6, 1, 47.5, 51.5], crs=ccrs.PlateCarree())
ax0.add_feature(cfeature.LAND.with_scale('110m'))
ax0.gridlines(draw_labels=True, dms=True, x_inline=False, y_inline=False)
plt.figure(figsize=(6.9228, 3))
ax1 = plt.axes(projection=ccrs.InterruptedGoodeHomolosine())
ax1.coastlines(resolution='110m')
ax1.gridlines(draw_labels=True)
plt.show()
def main():
rotated_crs = ccrs.RotatedPole(pole_longitude=120.0, pole_latitude=70.0)
ax0 = plt.axes(projection=rotated_crs)
ax0.set_extent([-6, 1, 47.5, 51.5], crs=ccrs.PlateCarree())
ax0.add_feature(cfeature.LAND.with_scale('110m'))
ax0.gridlines(draw_labels=True, dms=True, x_inline=False, y_inline=False)
plt.figure(figsize=(6.9228, 3))
ax1 = plt.axes(projection=ccrs.InterruptedGoodeHomolosine())
ax1.coastlines(resolution='110m')
ax1.gridlines(draw_labels=True)
plt.figure(figsize=(7, 3))
ax2 = plt.axes(projection=ccrs.PlateCarree())
ax2.coastlines(resolution='110m')
gl = ax2.gridlines(draw_labels=True)
gl.top_labels = False
gl.right_labels = False
plt.show()
plt.figure(figsize=(7, 3))
ax3 = plt.axes(projection=ccrs.PlateCarree())
ax3.set_extent([-65, -40, -15, 10])
# Create a feature for States/Admin 1 regions at 1:50m from Natural Earth
states_provinces = cfeature.NaturalEarthFeature(
category='cultural',
name='admin_1_states_provinces_lines',
scale='50m',
facecolor='none')
ax3.add_feature(states_provinces, edgecolor='gray')
ax3.coastlines(resolution='110m')
ax3.coastlines(resolution='110m')
gl = ax3.gridlines(draw_labels=True)
gl.change_gridline_tick_decimal_separator('{0:.3f}',
axis='both')
gl.set_latitude_hemisphere_str('Norte', 'Sul')
gl.set_longitude_hemisphere_str('O', 'L')
gl.top_labels = False
gl.right_labels = False
plt.show()
return plt.gcf().get_axes(), gl
def test_multiple_projections():
projections = [
ccrs.PlateCarree(),
ccrs.Robinson(),
ccrs.RotatedPole(pole_latitude=45, pole_longitude=180),
ccrs.OSGB(),
ccrs.TransverseMercator(),
ccrs.Mercator(globe=ccrs.Globe(semimajor_axis=math.degrees(1)),
min_latitude=-85.,
max_latitude=85.),
ccrs.LambertCylindrical(),
ccrs.Miller(),
ccrs.Gnomonic(),
ccrs.Stereographic(),
ccrs.NorthPolarStereo(),
ccrs.SouthPolarStereo(),
ccrs.Orthographic(),
ccrs.Mollweide(),
ccrs.InterruptedGoodeHomolosine(),
]
if ccrs.PROJ4_VERSION < (5, 0, 0):
# Produce the same sized image for old proj, to avoid having to replace
# the image. If this figure is regenerated for both old and new proj,
# then drop this condition.
rows = 5
else:
rows = np.ceil(len(projections) / 5)
fig = plt.figure(figsize=(10, 2 * rows))
for i, prj in enumerate(projections, 1):
ax = fig.add_subplot(rows, 5, i, projection=prj)
ax.set_global()
ax.coastlines()
plt.plot(-0.08, 51.53, 'o', transform=ccrs.PlateCarree())
plt.plot([-0.08, 132], [51.53, 43.17],
color='red',
transform=ccrs.PlateCarree())
plt.plot([-0.08, 132], [51.53, 43.17],
color='blue',
transform=ccrs.Geodetic())
def test_multiple_projections():
projections = [
ccrs.PlateCarree(),
ccrs.Robinson(),
ccrs.RotatedPole(pole_latitude=45, pole_longitude=180),
ccrs.OSGB(approx=True),
ccrs.TransverseMercator(approx=True),
ccrs.Mercator(globe=ccrs.Globe(semimajor_axis=math.degrees(1)),
min_latitude=-85.,
max_latitude=85.),
ccrs.LambertCylindrical(),
ccrs.Miller(),
ccrs.Gnomonic(),
ccrs.Stereographic(),
ccrs.NorthPolarStereo(),
ccrs.SouthPolarStereo(),
ccrs.Orthographic(),
ccrs.Mollweide(),
ccrs.InterruptedGoodeHomolosine(emphasis='land'),
ccrs.EckertI(),
ccrs.EckertII(),
ccrs.EckertIII(),
ccrs.EckertIV(),
ccrs.EckertV(),
ccrs.EckertVI(),
]
rows = np.ceil(len(projections) / 5).astype(int)
fig = plt.figure(figsize=(10, 2 * rows))
for i, prj in enumerate(projections, 1):
ax = fig.add_subplot(rows, 5, i, projection=prj)
ax.set_global()
ax.coastlines(resolution="110m")
plt.plot(-0.08, 51.53, 'o', transform=ccrs.PlateCarree())
plt.plot([-0.08, 132], [51.53, 43.17],
color='red',
transform=ccrs.PlateCarree())
plt.plot([-0.08, 132], [51.53, 43.17],
color='blue',
transform=ccrs.Geodetic())
def test_cartopy_projection(self):
cube = iris.load_cube(
tests.get_data_path(('PP', 'aPPglob1', 'global.pp')))
projections = {}
projections['RotatedPole'] = ccrs.RotatedPole(pole_longitude=177.5,
pole_latitude=37.5)
projections['Robinson'] = ccrs.Robinson()
projections['PlateCarree'] = ccrs.PlateCarree()
projections['NorthPolarStereo'] = ccrs.NorthPolarStereo()
projections['Orthographic'] = ccrs.Orthographic(central_longitude=-90,
central_latitude=45)
projections[
'InterruptedGoodeHomolosine'] = ccrs.InterruptedGoodeHomolosine()
projections['LambertCylindrical'] = ccrs.LambertCylindrical()
# Set up figure
fig = plt.figure(figsize=(10, 10))
gs = matplotlib.gridspec.GridSpec(nrows=3,
ncols=3,
hspace=1.5,
wspace=0.5)
for subplot_spec, (name, target_proj) in itertools.izip(
gs, projections.iteritems()):
# Set up axes and title
ax = plt.subplot(subplot_spec,
frameon=False,
projection=target_proj)
ax.set_title(name)
# Transform cube to target projection
new_cube, extent = iris.analysis.cartography.project(cube,
target_proj,
nx=150,
ny=150)
# Plot
plt.pcolor(
new_cube.coord('projection_x_coordinate').points,
new_cube.coord('projection_y_coordinate').points,
new_cube.data)
# Add coastlines
ax.coastlines()
# Tighten up layout
gs.tight_layout(plt.gcf())
# Verify resulting plot
self.check_graphic(tol=6e-4)
def test_central_longitude(emphasis, lon):
if emphasis == "ocean" and ccrs.PROJ4_VERSION < (7, 1, 0):
pytest.skip()
igh = ccrs.InterruptedGoodeHomolosine(central_longitude=lon,
emphasis=emphasis)
other_args = {"ellps=WGS84", "lon_0={}".format(lon)}
if emphasis == "land":
check_proj_params("igh", igh, other_args)
elif emphasis == "ocean":
check_proj_params("igh_o", igh, other_args)
assert_almost_equal(
np.array(igh.x_limits),
[-20037508.3427892, 20037508.3427892],
decimal=5,
)
assert_almost_equal(np.array(igh.y_limits),
[-8683259.7164347, 8683259.7164347])
def test_regrid_image():
# Source data
fname = os.path.join(config["repo_data_dir"], 'raster', 'natural_earth',
'50-natural-earth-1-downsampled.png')
nx = 720
ny = 360
source_proj = ccrs.PlateCarree()
source_x, source_y, _ = im_trans.mesh_projection(source_proj, nx, ny)
data = plt.imread(fname)
# Flip vertically to match source_x/source_y orientation
data = data[::-1]
# Target grid
target_nx = 300
target_ny = 300
target_proj = ccrs.InterruptedGoodeHomolosine(emphasis='land')
target_x, target_y, target_extent = im_trans.mesh_projection(
target_proj, target_nx, target_ny)
# Perform regrid
new_array = im_trans.regrid(data, source_x, source_y, source_proj,
target_proj, target_x, target_y)
# Plot
fig = plt.figure(figsize=(10, 10))
gs = mpl.gridspec.GridSpec(nrows=4, ncols=1, hspace=1.5, wspace=0.5)
# Set up axes and title
ax = fig.add_subplot(gs[0], projection=target_proj)
ax.imshow(new_array, origin='lower', extent=target_extent)
ax.coastlines()
# Plot each color slice (tests masking)
cmaps = {'red': 'Reds', 'green': 'Greens', 'blue': 'Blues'}
for i, color in enumerate(['red', 'green', 'blue']):
ax = fig.add_subplot(gs[i + 1], projection=target_proj)
ax.imshow(new_array[:, :, i],
extent=target_extent,
origin='lower',
cmap=cmaps[color])
ax.coastlines()
# Tighten up layout
gs.tight_layout(fig)
return fig
def test_regrid_blue_marble_img():
# Source data
filename = '/data/local/dataZoo/cartography/raster/blue_marble_720_360.png'
nx = 720
ny = 360
source_proj = ccrs.PlateCarree()
source_x, source_y, source_extent = cartopy.img_transform.mesh_projection(source_proj, nx, ny)
data = plt.imread(filename)
# Flip vertically to match source_x/source_y orientation
data = data[::-1]
# Target grid
target_nx = 300
target_ny = 300
target_proj = ccrs.InterruptedGoodeHomolosine()
target_x, target_y, target_extent = cartopy.img_transform.mesh_projection(target_proj,
target_nx,
target_ny)
# Perform regrid
new_array = cartopy.img_transform.regrid(data, source_x, source_y, source_proj,
target_proj, target_x, target_y)
# Plot
fig = plt.figure(figsize=(10, 10))
gs = matplotlib.gridspec.GridSpec(nrows=4, ncols=1, hspace=1.5, wspace=0.5)
# Set up axes and title
ax = plt.subplot(gs[0], frameon=False, projection=target_proj)
plt.imshow(new_array, origin='lower', extent=target_extent)
ax.coastlines()
# Plot each colour slice (tests masking)
cmaps = {'red': 'Reds', 'green': 'Greens', 'blue': 'Blues'}
for i, colour in enumerate(['red', 'green', 'blue']):
ax = plt.subplot(gs[i + 1], frameon=False, projection=target_proj)
ax.set_title(colour)
plt.pcolormesh(target_x[0, :], target_y[:, 0], new_array[:, :, i],
cmap=cmaps[colour])
ax.coastlines()
# Tighten up layout
gs.tight_layout(plt.gcf())
def test_multiple_projections():
projections = [
ccrs.PlateCarree(),
ccrs.Robinson(),
ccrs.RotatedPole(pole_latitude=45, pole_longitude=180),
ccrs.OSGB(),
ccrs.TransverseMercator(),
ccrs.Mercator(globe=ccrs.Globe(semimajor_axis=math.degrees(1)),
min_latitude=-85.,
max_latitude=85.),
ccrs.LambertCylindrical(),
ccrs.Miller(),
ccrs.Gnomonic(),
ccrs.Stereographic(),
ccrs.NorthPolarStereo(),
ccrs.SouthPolarStereo(),
ccrs.Orthographic(),
ccrs.Mollweide(),
ccrs.InterruptedGoodeHomolosine(),
]
fig = plt.figure(figsize=(10, 10))
for i, prj in enumerate(projections, 1):
ax = fig.add_subplot(5, 5, i, projection=prj)
ax.set_global()
ax.coastlines()
plt.plot(-0.08, 51.53, 'o', transform=ccrs.PlateCarree())
plt.plot([-0.08, 132], [51.53, 43.17],
color='red',
transform=ccrs.PlateCarree())
plt.plot([-0.08, 132], [51.53, 43.17],
color='blue',
transform=ccrs.Geodetic())
def plot_pcolormesh_global(xx,
yy,
data,
data_projection_code,
global_code,
cmin,
cmax,
subplots=[1, 1, 1]):
plt.subplots = subplots
# https://scitools.org.uk/cartopy/docs/latest/crs/projections.html
if global_code == 0:
ax = plt.axes(projection=ccrs.Robinson())
elif global_code == 1:
ax = plt.axes(projection=ccrs.EqualEarth())
elif global_code == 2:
ax = plt.axes(projection=ccrs.InterruptedGoodeHomolosine())
elif global_code == 3:
ax = plt.axes(projection=ccrs.PlateCarree()) # lat/lon
ax.gridlines(crs=ccrs.PlateCarree(),
draw_labels=False,
linewidth=1,
color='white',
alpha=0.5,
linestyle='--')
projection = ccrs.epsg(data_projection_code)
plt.pcolormesh(xx,
yy,
data,
transform=projection,
vmin=cmin,
vmax=cmax,
cmap='jet')
plt.colorbar()
ax.coastlines('110m', linewidth=0.8)
ax.add_feature(cfeature.LAND)
def set_proj(projection='Robinson', proj_default=True):
""" Set the projection for Cartopy.
Parameters
----------
projection : string
the map projection. Available projections:
'Robinson' (default), 'PlateCarree', 'AlbertsEqualArea',
'AzimuthalEquidistant','EquidistantConic','LambertConformal',
'LambertCylindrical','Mercator','Miller','Mollweide','Orthographic',
'Sinusoidal','Stereographic','TransverseMercator','UTM',
'InterruptedGoodeHomolosine','RotatedPole','OSGB','EuroPP',
'Geostationary','NearsidePerspective','EckertI','EckertII',
'EckertIII','EckertIV','EckertV','EckertVI','EqualEarth','Gnomonic',
'LambertAzimuthalEqualArea','NorthPolarStereo','OSNI','SouthPolarStereo'
proj_default : bool
If True, uses the standard projection attributes from Cartopy.
Enter new attributes in a dictionary to change them. Lists of attributes
can be found in the Cartopy documentation:
https://scitools.org.uk/cartopy/docs/latest/crs/projections.html#eckertiv
Returns
-------
proj : the Cartopy projection object
See Also
--------
pyleoclim.utils.mapping.map_all : mapping function making use of the projection
"""
if proj_default is not True and type(proj_default) is not dict:
raise TypeError(
'The default for the projections should either be provided' +
' as a dictionary or set to True')
# Set the projection
if projection == 'Robinson':
if proj_default is True:
proj = ccrs.Robinson()
else:
proj = ccrs.Robinson(**proj_default)
elif projection == 'PlateCarree':
if proj_default is True:
proj = ccrs.PlateCarree()
else:
proj = ccrs.PlateCarree(**proj_default)
elif projection == 'AlbersEqualArea':
if proj_default is True:
proj = ccrs.AlbersEqualArea()
else:
proj = ccrs.AlbersEqualArea(**proj_default)
elif projection == 'AzimuthalEquidistant':
if proj_default is True:
proj = ccrs.AzimuthalEquidistant()
else:
proj = ccrs.AzimuthalEquidistant(**proj_default)
elif projection == 'EquidistantConic':
if proj_default is True:
proj = ccrs.EquidistantConic()
else:
proj = ccrs.EquidistantConic(**proj_default)
elif projection == 'LambertConformal':
if proj_default is True:
proj = ccrs.LambertConformal()
else:
proj = ccrs.LambertConformal(**proj_default)
elif projection == 'LambertCylindrical':
if proj_default is True:
proj = ccrs.LambertCylindrical()
else:
proj = ccrs.LambertCylindrical(**proj_default)
elif projection == 'Mercator':
if proj_default is True:
proj = ccrs.Mercator()
else:
proj = ccrs.Mercator(**proj_default)
elif projection == 'Miller':
if proj_default is True:
proj = ccrs.Miller()
else:
proj = ccrs.Miller(**proj_default)
elif projection == 'Mollweide':
if proj_default is True:
proj = ccrs.Mollweide()
else:
proj = ccrs.Mollweide(**proj_default)
elif projection == 'Orthographic':
if proj_default is True:
proj = ccrs.Orthographic()
else:
proj = ccrs.Orthographic(**proj_default)
elif projection == 'Sinusoidal':
if proj_default is True:
proj = ccrs.Sinusoidal()
else:
proj = ccrs.Sinusoidal(**proj_default)
elif projection == 'Stereographic':
if proj_default is True:
proj = ccrs.Stereographic()
else:
proj = ccrs.Stereographic(**proj_default)
elif projection == 'TransverseMercator':
if proj_default is True:
proj = ccrs.TransverseMercator()
else:
proj = ccrs.TransverseMercator(**proj_default)
elif projection == 'TransverseMercator':
if proj_default is True:
proj = ccrs.TransverseMercator()
else:
proj = ccrs.TransverseMercator(**proj_default)
elif projection == 'UTM':
if proj_default is True:
proj = ccrs.UTM()
else:
proj = ccrs.UTM(**proj_default)
elif projection == 'UTM':
if proj_default is True:
proj = ccrs.UTM()
else:
proj = ccrs.UTM(**proj_default)
elif projection == 'InterruptedGoodeHomolosine':
if proj_default is True:
proj = ccrs.InterruptedGoodeHomolosine()
else:
proj = ccrs.InterruptedGoodeHomolosine(**proj_default)
elif projection == 'RotatedPole':
if proj_default is True:
proj = ccrs.RotatedPole()
else:
proj = ccrs.RotatedPole(**proj_default)
elif projection == 'OSGB':
if proj_default is True:
proj = ccrs.OSGB()
else:
proj = ccrs.OSGB(**proj_default)
elif projection == 'EuroPP':
if proj_default is True:
proj = ccrs.EuroPP()
else:
proj = ccrs.EuroPP(**proj_default)
elif projection == 'Geostationary':
if proj_default is True:
proj = ccrs.Geostationary()
else:
proj = ccrs.Geostationary(**proj_default)
elif projection == 'NearsidePerspective':
if proj_default is True:
proj = ccrs.NearsidePerspective()
else:
proj = ccrs.NearsidePerspective(**proj_default)
elif projection == 'EckertI':
if proj_default is True:
proj = ccrs.EckertI()
else:
proj = ccrs.EckertI(**proj_default)
elif projection == 'EckertII':
if proj_default is True:
proj = ccrs.EckertII()
else:
proj = ccrs.EckertII(**proj_default)
elif projection == 'EckertIII':
if proj_default is True:
proj = ccrs.EckertIII()
else:
proj = ccrs.EckertIII(**proj_default)
elif projection == 'EckertIV':
if proj_default is True:
proj = ccrs.EckertIV()
else:
proj = ccrs.EckertIV(**proj_default)
elif projection == 'EckertV':
if proj_default is True:
proj = ccrs.EckertV()
else:
proj = ccrs.EckertV(**proj_default)
elif projection == 'EckertVI':
if proj_default is True:
proj = ccrs.EckertVI()
else:
proj = ccrs.EckertVI(**proj_default)
elif projection == 'EqualEarth':
if proj_default is True:
proj = ccrs.EqualEarth()
else:
proj = ccrs.EqualEarth(**proj_default)
elif projection == 'Gnomonic':
if proj_default is True:
proj = ccrs.Gnomonic()
else:
proj = ccrs.Gnomonic(**proj_default)
elif projection == 'LambertAzimuthalEqualArea':
if proj_default is True:
proj = ccrs.LambertAzimuthalEqualArea()
else:
proj = ccrs.LambertAzimuthalEqualArea(**proj_default)
elif projection == 'NorthPolarStereo':
if proj_default is True:
proj = ccrs.NorthPolarStereo()
else:
proj = ccrs.NorthPolarStereo(**proj_default)
elif projection == 'OSNI':
if proj_default is True:
proj = ccrs.OSNI()
else:
proj = ccrs.OSNI(**proj_default)
elif projection == 'OSNI':
if proj_default is True:
proj = ccrs.SouthPolarStereo()
else:
proj = ccrs.SouthPolarStereo(**proj_default)
else:
raise ValueError('Invalid projection type')
return proj
def _create_projection_axis(projection_type, user_lon_0, lat_lim, subplot_grid,
less_output):
"""Set appropriate axis for projection type
See plot_proj_to_latlon_grid for input parameter definitions.
Returns
-------
ax : matplotlib axis object
defined with the correct projection
show_grid_labels : logical
True = show the grid labels, only currently
supported for PlateCarree and Mercator projections
"""
# initialize (optional) subplot variables
row = []
col = []
ind = []
if subplot_grid is not None:
if type(subplot_grid) is dict:
row = subplot_grid['nrows']
col = subplot_grid['ncols']
ind = subplot_grid['index']
elif type(subplot_grid) is list:
row = subplot_grid[0]
col = subplot_grid[1]
ind = subplot_grid[2]
else:
raise TypeError('Unexpected subplot_grid type: ',
type(subplot_grid))
if projection_type == 'Mercator':
if subplot_grid is not None:
ax = plt.subplot(
row,
col,
ind,
projection=ccrs.Mercator(central_longitude=user_lon_0))
else:
ax = plt.axes(projection=ccrs.Mercator(
central_longitude=user_lon_0))
show_grid_labels = True
elif projection_type == 'PlateCaree':
if subplot_grid is not None:
ax = plt.subplot(
row,
col,
ind,
projection=ccrs.PlateCarree(central_longitude=user_lon_0))
else:
ax = plt.axes(projection=ccrs.PlateCarree(
central_longitude=user_lon_0))
show_grid_labels = True
elif projection_type == 'cyl':
if subplot_grid is not None:
ax = plt.subplot(row,
col,
ind,
projection=ccrs.LambertCylindrical(
central_longitude=user_lon_0))
else:
ax = plt.axes(projection=ccrs.LambertCylindrical(
central_longitude=user_lon_0))
show_grid_labels = False
elif projection_type == 'robin':
if subplot_grid is not None:
ax = plt.subplot(
row,
col,
ind,
projection=ccrs.Robinson(central_longitude=user_lon_0))
else:
ax = plt.axes(projection=ccrs.Robinson(
central_longitude=user_lon_0))
show_grid_labels = False
elif projection_type == 'ortho':
if subplot_grid is not None:
ax = plt.subplot(
row,
col,
ind,
projection=ccrs.Orthographic(central_longitude=user_lon_0))
else:
ax = plt.axes(projection=ccrs.Orthographic(
central_longitude=user_lon_0))
show_grid_labels = False
elif projection_type == 'stereo':
if lat_lim > 0:
stereo_proj = ccrs.NorthPolarStereo()
else:
stereo_proj = ccrs.SouthPolarStereo()
if subplot_grid is not None:
ax = plt.subplot(row, col, ind, projection=stereo_proj)
else:
ax = plt.axes(projection=stereo_proj)
show_grid_labels = False
elif projection_type == 'InterruptedGoodeHomolosine':
if subplot_grid is not None:
ax = plt.subplot(row,
col,
ind,
projection=ccrs.InterruptedGoodeHomolosine(
central_longitude=user_lon_0))
else:
ax = plt.axes(projection=ccrs.InterruptedGoodeHomolosine(
central_longitude=user_lon_0))
show_grid_labels = False
else:
raise NotImplementedError(
'projection type must be either "Mercator", "PlateCaree", "cyl", "robin", "ortho", "stereo", or "InterruptedGoodeHomolosine"'
)
if not less_output:
print('Projection type: ', projection_type)
return (ax, show_grid_labels)
########################################################## # Set up map and plot data # Open a figure plt.figure(1) plt.clf() # data coordinates: Use Geodetic (or PlateCarree) for data in lat-lon coordinates datacoord = ccrs.Geodetic() datacoord = ccrs.PlateCarree() # Map projection for Global ax = plt.axes(projection=ccrs.PlateCarree()) ax = plt.axes(projection=ccrs.Robinson()) ax = plt.axes(projection=ccrs.InterruptedGoodeHomolosine()) # Map projection for North Pole ax = plt.axes(projection=ccrs.NorthPolarStereo()) ax.set_extent([-180, 180, 60, 90], ccrs.PlateCarree()) # Map projection for CONUS ax = plt.axes(projection=ccrs.LambertConformal()) #ax = plt.axes(projection=ccrs.LambertConformal(central_longitude=-96,central_latitude=39,standard_parallels=(33,45))) # Set lat-lon of map edges. These are reasonable for CONUS ax.set_extent([-120, -73, 25, 50], ccrs.PlateCarree()) # Add your gridded data plt.pcolormesh(lonedge, latedge, data, transform=datacoord) # Add your point data
def time_ocean_igh():
ccrs.InterruptedGoodeHomolosine().project_geometry(OCEAN.geoms)
def get_map_projection(
proj_name,
central_longitude=0.0,
central_latitude=0.0,
false_easting=0.0,
false_northing=0.0,
globe=None,
standard_parallels=(20.0, 50.0),
scale_factor=None,
min_latitude=-80.0,
max_latitude=84.0,
true_scale_latitude=None,
latitude_true_scale=None, ### BOTH
secant_latitudes=None,
pole_longitude=0.0,
pole_latitude=90.0,
central_rotated_longitude=0.0,
sweep_axis='y',
satellite_height=35785831,
cutoff=-30,
approx=None,
southern_hemisphere=False,
zone=15): #### numeric UTM zone
proj_name = proj_name.lower()
if (proj_name == 'albersequalarea'):
proj = ccrs.AlbersEqualArea(central_longitude=central_longitude,
central_latitude=central_latitude,
false_easting=false_easting,
false_northing=false_northing,
globe=globe,
standard_parallels=standard_parallels)
elif (proj_name == 'azimuthalequidistant'):
proj = ccrs.AzimuthalEquidistant(central_longitude=central_longitude,
central_latitude=central_latitude,
false_easting=false_easting,
false_northing=false_northing,
globe=globe)
elif (proj_name == 'equidistantconic'):
proj = ccrs.EquidistantConic(central_longitude=central_longitude,
central_latitude=central_latitude,
false_easting=false_easting,
false_northing=false_northing,
globe=globe,
standard_parallels=standard_parallels)
elif (proj_name == 'lambertconformal'):
proj = ccrs.LambertConformal(
central_longitude=-96.0, ##########
central_latitude=39.0, ##########
false_easting=false_easting,
false_northing=false_northing,
globe=globe,
secant_latitudes=None,
standard_parallels=None, ## default: (33,45)
cutoff=cutoff)
elif (proj_name == 'lambertcylindrical'):
proj = ccrs.LambertCylindrical(central_longitude=central_longitude)
elif (proj_name == 'mercator'):
proj = ccrs.Mercator(central_longitude=central_longitude,
min_latitude=min_latitude,
max_latitude=max_latitude,
latitude_true_scale=latitude_true_scale,
false_easting=false_easting,
false_northing=false_northing,
globe=globe,
scale_factor=None) #########
elif (proj_name == 'miller'):
proj = ccrs.Miller(central_longitude=central_longitude, globe=globe)
elif (proj_name == 'mollweide'):
proj = ccrs.Mollweide(central_longitude=central_longitude,
false_easting=false_easting,
false_northing=false_northing,
globe=globe)
elif (proj_name == 'orthographic'):
proj = ccrs.Orthographic(central_longitude=central_longitude,
central_latitude=central_latitude,
globe=globe)
elif (proj_name == 'robinson'):
proj = ccrs.Robinson(central_longitude=central_longitude,
false_easting=false_easting,
false_northing=false_northing,
globe=globe)
elif (proj_name == 'sinusoidal'):
proj = ccrs.Sinusoidal(central_longitude=central_longitude,
false_easting=false_easting,
false_northing=false_northing,
globe=globe)
elif (proj_name == 'stereographic'):
proj = ccrs.Stereographic(central_latitude=central_latitude,
central_longitude=central_longitude,
false_easting=false_easting,
false_northing=false_northing,
globe=globe,
true_scale_latitude=true_scale_latitude,
scale_factor=scale_factor)
elif (proj_name == 'transversemercator'):
proj = ccrs.TransverseMercator(
central_longitude=central_longitude,
central_latitude=central_latitude,
false_easting=false_easting,
false_northing=false_northing,
globe=globe,
scale_factor=1.0, ##########
approx=approx)
elif (proj_name == 'utm'):
proj = ccrs.UTM(zone,
southern_hemisphere=southern_hemisphere,
globe=globe)
elif (proj_name == 'interruptedgoodehomolosine'):
proj = ccrs.InterruptedGoodeHomolosine(
central_longitude=central_longitude, globe=globe)
elif (proj_name == 'rotatedpole'):
proj = ccrs.RotatedPole(
pole_longitude=pole_longitude,
pole_latitude=pole_latitude,
globe=globe,
central_rotated_longitude=central_rotated_longitude)
elif (proj_name == 'osgb'):
proj = ccrs.OSGB(approx=approx)
elif (proj_name == 'europp'):
proj = ccrs.EuroPP
elif (proj_name == 'geostationary'):
proj = ccrs.Geostationary(central_longitude=central_longitude,
satellite_height=satellite_height,
false_easting=false_easting,
false_northing=false_northing,
globe=globe,
sweep_axis=sweep_axis)
elif (proj_name == 'nearsideperspective'):
proj = ccrs.NearsidePerspective(central_longitude=central_longitude,
central_latitude=central_latitude,
satellite_height=satellite_height,
false_easting=false_easting,
false_northing=false_northing,
globe=globe)
elif (proj_name == 'eckerti'):
proj = ccrs.EckertI(central_longitude=central_longitude,
false_easting=false_easting,
false_northing=false_northing,
globe=globe)
elif (proj_name == 'eckertii'):
proj = ccrs.EckertII(central_longitude=central_longitude,
false_easting=false_easting,
false_northing=false_northing,
globe=globe)
elif (proj_name == 'eckertiii'):
proj = ccrs.EckertIII(central_longitude=central_longitude,
false_easting=false_easting,
false_northing=false_northing,
globe=globe)
elif (proj_name == 'eckertiv'):
proj = ccrs.EckertIV(central_longitude=central_longitude,
false_easting=false_easting,
false_northing=false_northing,
globe=globe)
elif (proj_name == 'eckertv'):
proj = ccrs.EckertV(central_longitude=central_longitude,
false_easting=false_easting,
false_northing=false_northing,
globe=globe)
elif (proj_name == 'eckertvi'):
proj = ccrs.EckertVI(central_longitude=central_longitude,
false_easting=false_easting,
false_northing=false_northing,
globe=globe)
elif (proj_name == 'equalearth'):
proj = ccrs.EqualEarth(central_longitude=central_longitude,
false_easting=false_easting,
false_northing=false_northing,
globe=globe)
elif (proj_name == 'gnomonic'):
proj = ccrs.Gnomonic(central_latitude=central_latitude,
central_longitude=central_longitude,
globe=globe)
elif (proj_name == 'lambertazimuthalequalarea'):
proj = ccrs.LambertAzimuthalEqualArea(
central_longitude=central_longitude,
central_latitude=central_latitude,
globe=globe,
false_easting=false_easting,
false_northing=false_northing)
elif (proj_name == 'northpolarstereo'):
proj = ccrs.NorthPolarStereo(central_longitude=central_longitude,
true_scale_latitude=true_scale_latitude,
globe=globe)
elif (proj_name == 'osni'):
proj = ccrs.OSNI(approx=approx)
elif (proj_name == 'southpolarstereo'):
proj = ccrs.SouthPolarStereo(central_longitude=central_longitude,
true_scale_latitude=true_scale_latitude,
globe=globe)
else:
# This is same as "Geographic coordinates"
proj = ccrs.PlateCarree(central_longitude=central_longitude,
globe=globe)
return proj
def projection(self):
if self.proj is None:
return ccrs.PlateCarree()
proj_dict = ast.literal_eval(self.proj)
user_proj = proj_dict.pop("proj")
if user_proj == 'PlateCarree':
self.xylim_supported = True
return ccrs.PlateCarree(**proj_dict)
elif user_proj == 'AlbersEqualArea':
return ccrs.AlbersEqualArea(**proj_dict)
elif user_proj == 'AzimuthalEquidistant':
return ccrs.AzimuthalEquidistant(**proj_dict)
elif user_proj == 'EquidistantConic':
return ccrs.EquidistantConic(**proj_dict)
elif user_proj == 'LambertConformal':
return ccrs.LambertConformal(**proj_dict)
elif user_proj == 'LambertCylindrical':
return ccrs.LambertCylindrical(**proj_dict)
elif user_proj == 'Mercator':
return ccrs.Mercator(**proj_dict)
elif user_proj == 'Miller':
return ccrs.Miller(**proj_dict)
elif user_proj == 'Mollweide':
return ccrs.Mollweide(**proj_dict)
elif user_proj == 'Orthographic':
return ccrs.Orthographic(**proj_dict)
elif user_proj == 'Robinson':
return ccrs.Robinson(**proj_dict)
elif user_proj == 'Sinusoidal':
return ccrs.Sinusoidal(**proj_dict)
elif user_proj == 'Stereographic':
return ccrs.Stereographic(**proj_dict)
elif user_proj == 'TransverseMercator':
return ccrs.TransverseMercator(**proj_dict)
elif user_proj == 'UTM':
return ccrs.UTM(**proj_dict)
elif user_proj == 'InterruptedGoodeHomolosine':
return ccrs.InterruptedGoodeHomolosine(**proj_dict)
elif user_proj == 'RotatedPole':
return ccrs.RotatedPole(**proj_dict)
elif user_proj == 'OSGB':
self.xylim_supported = False
return ccrs.OSGB(**proj_dict)
elif user_proj == 'EuroPP':
self.xylim_supported = False
return ccrs.EuroPP(**proj_dict)
elif user_proj == 'Geostationary':
return ccrs.Geostationary(**proj_dict)
elif user_proj == 'NearsidePerspective':
return ccrs.NearsidePerspective(**proj_dict)
elif user_proj == 'EckertI':
return ccrs.EckertI(**proj_dict)
elif user_proj == 'EckertII':
return ccrs.EckertII(**proj_dict)
elif user_proj == 'EckertIII':
return ccrs.EckertIII(**proj_dict)
elif user_proj == 'EckertIV':
return ccrs.EckertIV(**proj_dict)
elif user_proj == 'EckertV':
return ccrs.EckertV(**proj_dict)
elif user_proj == 'EckertVI':
return ccrs.EckertVI(**proj_dict)
elif user_proj == 'EqualEarth':
return ccrs.EqualEarth(**proj_dict)
elif user_proj == 'Gnomonic':
return ccrs.Gnomonic(**proj_dict)
elif user_proj == 'LambertAzimuthalEqualArea':
return ccrs.LambertAzimuthalEqualArea(**proj_dict)
elif user_proj == 'NorthPolarStereo':
return ccrs.NorthPolarStereo(**proj_dict)
elif user_proj == 'OSNI':
return ccrs.OSNI(**proj_dict)
elif user_proj == 'SouthPolarStereo':
return ccrs.SouthPolarStereo(**proj_dict)
def test_igh_land():
crs = ccrs.InterruptedGoodeHomolosine(emphasis="land")
ax = plt.axes(projection=crs)
ax.coastlines()
ax.gridlines()
return ax.figure
p = ccrs.PlateCarree(central_longitude=0)
threshold = 0
if projection == 'mollweide':
p = ccrs.Mollweide(central_longitude=0)
threshold = 1e6
if projection == 'robinson':
p = ccrs.Robinson(central_longitude=0)
threshold = 0
if projection == 'equalearth':
p = ccrs.EqualEarth(central_longitude=0)
threshold = 0
if projection == 'geostationary':
p = ccrs.Geostationary(central_longitude=0)
threshold = 0
if projection == 'goodehomolosine':
p = ccrs.InterruptedGoodeHomolosine(central_longitude=0)
threshold = 0
if projection == 'europp':
p = ccrs.EuroPP()
threshold = 0
if projection == 'northpolarstereo':
p = ccrs.NorthPolarStereo()
threshold = 0
if projection == 'southpolarstereo':
p = ccrs.SouthPolarStereo()
threshold = 0
if projection == 'lambertconformal':
p = ccrs.LambertConformal(central_longitude=0)
threshold = 0
#----------------------------------------------------------------------------
def main():
rp = ccrs.RotatedPole(pole_latitude=45, pole_longitude=180)
pc = ccrs.PlateCarree()
# ax = plt.subplot(211, projection=rp)
# ax.bluemarble()
# ax.coastlines()
# XXX The change in projection is a result of plt.plot making a poly or a line depending on some things...
x, y = [-44, -44, 45, 45], [-45, 45, 45, -45]
# x, y = [-44, -44, 45, 45, -44], [-45, 45, 45, -45, -45]
# # XXX why is the horizontal line on the native projection not straight? BUG!
# ax.plot(x, y, marker='o', transform=rp)
# ax.gridlines()
# ax = plt.subplot(212, projection=pc)
ax = plt.axes(projection=pc)
ax = plt.axes(projection=ccrs.InterruptedGoodeHomolosine())
# ax = plt.axes(projection=rp)
x, y = [-20, -20, 20, 20], [-20, 20, 20, -20]
# x, y = [-40, -40, 20, 20], [-20, 20, 20, -20]
ax.plot(x, y, transform=rp)
#ax.ll_boundary_poly_draw()
# ax.stock_img('bluemarble')
# ax.coastlines()
# ax.ll_extents_draw()
#ax.gshhs_line(outline_color='gray')
plt.show()
return
# ax.bluemarble()
# ax.coastlines()
# ax.gshhs_line()
x, y = [-20, -20, 20, 20], [-20, 20, 20, -20]
ax.plot(x, y, transform=rp)
x, y = [20, -20], [-20, -20]
ax.plot(x, y, transform=rp)
# ax.gridlines()
print ax.ll_extents()
# ax.set_xlim(-50, 50)
# ax.set_ylim(30, 70)
x1, y1, x2, y2 = ax.ll_boundary_poly().bounds
from matplotlib.patches import Rectangle
rect = Rectangle([x1, y1], x2-x1, y2-y1, edgecolor='gray', facecolor='none')
ax.add_patch(rect)
# ax.gshhs_line(outline_color='gray')
#ax.gshhs_line()
ax.stock_img('ne_shaded')
plt.draw()
plt.show()
