def test_secant_latitudes(self):
lat_1, lat_2 = 40, 41
lcc = LambertConformal(secant_latitudes=(lat_1, lat_2))
ccrs = lcc.as_cartopy_crs()
self.assertEqual(lat_1, ccrs.proj4_params['lat_1'])
self.assertEqual(lat_2, ccrs.proj4_params['lat_2'])
def test_fail_secant_latitudes_excessive(self):
emsg = 'one or two secant latitudes required'
with self.assertRaisesRegexp(ValueError, emsg):
LambertConformal(secant_latitudes=(1, 2, 3))
def test_secant_latitudes_single_value(self):
lat_1 = 40
lcc = LambertConformal(secant_latitudes=lat_1)
ccrs = lcc.as_cartopy_crs()
self.assertEqual(lat_1, ccrs.proj4_params['lat_1'])
self.assertNotIn('lat_2', ccrs.proj4_params)
def test_fail_secant_latitudes_none(self):
emsg = "one or two secant latitudes required"
with self.assertRaisesRegex(ValueError, emsg):
LambertConformal(secant_latitudes=())
def test_south_cutoff(self):
lcc = LambertConformal(0, 0, secant_latitudes=(-30, -60))
ccrs = lcc.as_cartopy_crs()
self.assertEqual(ccrs.cutoff, 30)
def _default_coord_system(self):
return LambertConformal(central_lat=39.0, central_lon=-96.0,
false_easting=0.0, false_northing=0.0,
secant_latitudes=(33, 45),
ellipsoid=self.default_ellipsoid)
def test_fail_secant_latitudes_excessive(self):
emsg = "secant latitudes"
with self.assertRaisesRegex(ValueError, emsg):
LambertConformal(secant_latitudes=(1, 2, 3))
def test_no_optional_args(self):
# Check expected defaults with no optional args.
crs = LambertConformal()
self._check_crs_defaults(crs)
def test_set_one_parallel(self):
# Check that setting the optional (non-ellipse) args works.
# (Except secant_latitudes, which are done separately).
crs = LambertConformal(secant_latitudes=-44)
self.assertEqual(len(crs.secant_latitudes), 1)
self.assertEqualAndKind(crs.secant_latitudes[0], -44.0)
def test_south_cutoff(self):
lcc = LambertConformal(0, 0, secant_latitudes=(-30, -60))
ccrs = lcc.as_cartopy_crs()
self.assertEqual(ccrs.cutoff, 30)
def test_secant_latitudes(self):
lat_1, lat_2 = 40, 41
lcc = LambertConformal(secant_latitudes=(lat_1, lat_2))
ccrs = lcc.as_cartopy_crs()
self.assertEqual(lat_1, ccrs.proj4_params['lat_1'])
self.assertEqual(lat_2, ccrs.proj4_params['lat_2'])
def test_secant_latitudes_single_value(self):
lat_1 = 40
lcc = LambertConformal(secant_latitudes=lat_1)
ccrs = lcc.as_cartopy_crs()
self.assertEqual(lat_1, ccrs.proj4_params['lat_1'])
self.assertNotIn('lat_2', ccrs.proj4_params)
