def test_expand_without_dims(self):
"""Test expanding native resampling with no dimensions specified."""
from satpy.resample import NativeResampler
import numpy as np
import dask.array as da
from xarray import DataArray
from pyresample.geometry import AreaDefinition
from pyresample.utils import proj4_str_to_dict
ds1 = DataArray(da.zeros((100, 50), chunks=85))
proj_dict = proj4_str_to_dict('+proj=lcc +datum=WGS84 +ellps=WGS84 '
'+lon_0=-95. +lat_0=25 +lat_1=25 '
'+units=m +no_defs')
target = AreaDefinition(
'test',
'test',
'test',
proj_dict,
x_size=100,
y_size=200,
area_extent=(-1000., -1500., 1000., 1500.),
)
# source geo def doesn't actually matter
resampler = NativeResampler(None, target)
new_arr = resampler.resample(ds1)
self.assertEqual(new_arr.shape, (200, 100))
new_arr2 = resampler.resample(ds1.compute())
self.assertTrue(np.all(new_arr == new_arr2))
def test_expand_reduce(self):
"""Test class method 'expand_reduce' basics."""
from satpy.resample import NativeResampler
import numpy as np
import dask.array as da
d_arr = da.zeros((6, 20), chunks=4)
new_arr = NativeResampler.expand_reduce(d_arr, {0: 2., 1: 2.})
self.assertEqual(new_arr.shape, (12, 40))
new_arr = NativeResampler.expand_reduce(d_arr, {0: .5, 1: .5})
self.assertEqual(new_arr.shape, (3, 10))
self.assertRaises(ValueError, NativeResampler.expand_reduce, d_arr, {
0: 1. / 3,
1: 1.
})
new_arr = NativeResampler.expand_reduce(d_arr, {0: 1., 1: 1.})
self.assertEqual(new_arr.shape, (6, 20))
self.assertIs(new_arr, d_arr)
self.assertRaises(ValueError, NativeResampler.expand_reduce, d_arr, {
0: 0.333323423,
1: 1.
})
self.assertRaises(ValueError, NativeResampler.expand_reduce, d_arr, {
0: 1.333323423,
1: 1.
})
n_arr = np.zeros((6, 20))
new_arr = NativeResampler.expand_reduce(n_arr, {0: 2., 1: 1.0})
self.assertTrue(np.all(new_arr.compute()[::2, :] == n_arr))
def test_expand_dims_3d(self):
"""Test expanding native resampling with 3D data."""
from satpy.resample import NativeResampler
import numpy as np
import dask.array as da
from xarray import DataArray
from pyresample.geometry import AreaDefinition
from pyresample.utils import proj4_str_to_dict
ds1 = DataArray(da.zeros((3, 100, 50), chunks=85),
dims=('bands', 'y', 'x'),
coords={
'bands': ['R', 'G', 'B'],
'y': da.arange(100, chunks=85),
'x': da.arange(50, chunks=85)
})
proj_dict = proj4_str_to_dict('+proj=lcc +datum=WGS84 +ellps=WGS84 '
'+lon_0=-95. +lat_0=25 +lat_1=25 '
'+units=m +no_defs')
target = AreaDefinition(
'test',
'test',
'test',
proj_dict,
100,
200,
(-1000., -1500., 1000., 1500.),
)
# source geo def doesn't actually matter
resampler = NativeResampler(None, target)
new_arr = resampler.resample(ds1)
self.assertEqual(new_arr.shape, (3, 200, 100))
new_arr2 = resampler.resample(ds1.compute())
self.assertTrue(np.all(new_arr == new_arr2))
def test_expand_dims_3d(self):
"""Test expanding native resampling with 3D data."""
from satpy.resample import NativeResampler
import numpy as np
ds1, source_area, _, _, target_area = get_test_data(
input_shape=(3, 100, 50), input_dims=('bands', 'y', 'x'))
# source geo def doesn't actually matter
resampler = NativeResampler(source_area, target_area)
new_data = resampler.resample(ds1)
self.assertEqual(new_data.shape, (3, 200, 100))
new_data2 = resampler.resample(ds1.compute())
self.assertTrue(np.all(new_data == new_data2))
self.assertIn('y', new_data.coords)
self.assertIn('x', new_data.coords)
self.assertIn('bands', new_data.coords)
np.testing.assert_equal(new_data.coords['bands'].values,
['R', 'G', 'B'])
if CRS is not None:
self.assertIn('crs', new_data.coords)
self.assertIsInstance(new_data.coords['crs'].item(), CRS)
self.assertIn('lcc', new_data.coords['crs'].item().to_proj4())
self.assertEqual(new_data.coords['y'].attrs['units'], 'meter')
self.assertEqual(new_data.coords['x'].attrs['units'], 'meter')
if hasattr(target_area, 'crs'):
self.assertIs(target_area.crs, new_data.coords['crs'].item())
def test_expand_without_dims(self):
from satpy.resample import NativeResampler
import numpy as np
import dask.array as da
from xarray import DataArray
from pyresample.geometry import AreaDefinition
from pyresample.utils import proj4_str_to_dict
ds1 = DataArray(da.zeros((100, 50), chunks=85))
proj_dict = proj4_str_to_dict('+proj=lcc +datum=WGS84 +ellps=WGS84 '
'+lon_0=-95. +lat_0=25 +lat_1=25 '
'+units=m +no_defs')
target = AreaDefinition(
'test',
'test',
'test',
proj_dict,
x_size=100,
y_size=200,
area_extent=(-1000., -1500., 1000., 1500.),
)
# source geo def doesn't actually matter
resampler = NativeResampler(None, target)
new_arr = resampler.resample(ds1)
self.assertEqual(new_arr.shape, (200, 100))
new_arr2 = resampler.resample(ds1.compute())
self.assertTrue(np.all(new_arr == new_arr2))
def test_expand_without_dims(self):
"""Test expanding native resampling with no dimensions specified."""
from satpy.resample import NativeResampler
import numpy as np
ds1, source_area, _, _, target_area = get_test_data(input_dims=None)
# source geo def doesn't actually matter
resampler = NativeResampler(source_area, target_area)
new_data = resampler.resample(ds1)
self.assertEqual(new_data.shape, (200, 100))
new_data2 = resampler.resample(ds1.compute())
self.assertTrue(np.all(new_data == new_data2))
if CRS is not None:
self.assertIn('crs', new_data.coords)
self.assertIsInstance(new_data.coords['crs'].item(), CRS)
self.assertIn('lcc', new_data.coords['crs'].item().to_proj4())
def test_expand_without_dims_4D(self):
"""Test expanding native resampling with 4D data with no dimensions specified."""
from satpy.resample import NativeResampler
ds1, source_area, _, _, target_area = get_test_data(
input_shape=(2, 3, 100, 50), input_dims=None)
# source geo def doesn't actually matter
resampler = NativeResampler(source_area, target_area)
self.assertRaises(ValueError, resampler.resample, ds1)
def test_expand_without_dims(self):
"""Test expanding native resampling with no dimensions specified."""
import numpy as np
from satpy.resample import NativeResampler
ds1, source_area, _, _, target_area = get_test_data(input_dims=None)
# source geo def doesn't actually matter
resampler = NativeResampler(source_area, target_area)
new_data = resampler.resample(ds1)
self.assertEqual(new_data.shape, (200, 100))
new_data2 = resampler.resample(ds1.compute())
self.assertTrue(np.all(new_data == new_data2))
self.assertIn('crs', new_data.coords)
self.assertIsInstance(new_data.coords['crs'].item(), CRS)
self.assertIn(
'lambert', new_data.coords['crs'].item().coordinate_operation.
method_name.lower())
self.assertEqual(target_area.crs, new_data.coords['crs'].item())
def test_expand_dims(self):
"""Test expanding native resampling with 2D data."""
from satpy.resample import NativeResampler
import numpy as np
ds1, source_area, _, _, target_area = get_test_data()
# source geo def doesn't actually matter
resampler = NativeResampler(source_area, target_area)
new_data = resampler.resample(ds1)
self.assertEqual(new_data.shape, (200, 100))
new_data2 = resampler.resample(ds1.compute())
self.assertTrue(np.all(new_data == new_data2))
self.assertIn('y', new_data.coords)
self.assertIn('x', new_data.coords)
self.assertIn('crs', new_data.coords)
self.assertIsInstance(new_data.coords['crs'].item(), CRS)
self.assertIn('lambert', new_data.coords['crs'].item().coordinate_operation.method_name.lower())
self.assertEqual(new_data.coords['y'].attrs['units'], 'meter')
self.assertEqual(new_data.coords['x'].attrs['units'], 'meter')
self.assertEqual(target_area.crs, new_data.coords['crs'].item())
def test_expand_reduce(self):
from satpy.resample import NativeResampler
import numpy as np
import dask.array as da
d_arr = da.zeros((6, 20), chunks=4)
new_arr = NativeResampler.expand_reduce(d_arr, {0: 2., 1: 2.})
self.assertEqual(new_arr.shape, (12, 40))
new_arr = NativeResampler.expand_reduce(d_arr, {0: .5, 1: .5})
self.assertEqual(new_arr.shape, (3, 10))
self.assertRaises(ValueError, NativeResampler.expand_reduce,
d_arr, {0: 1. / 3, 1: 1.})
new_arr = NativeResampler.expand_reduce(d_arr, {0: 1., 1: 1.})
self.assertEqual(new_arr.shape, (6, 20))
self.assertIs(new_arr, d_arr)
self.assertRaises(ValueError, NativeResampler.expand_reduce,
d_arr, {0: 0.333323423, 1: 1.})
self.assertRaises(ValueError, NativeResampler.expand_reduce,
d_arr, {0: 1.333323423, 1: 1.})
n_arr = np.zeros((6, 20))
new_arr = NativeResampler.expand_reduce(n_arr, {0: 2., 1: 1.0})
self.assertTrue(np.all(new_arr.compute()[::2, :] == n_arr))
def test_expand_without_dims_4D(self):
"""Test expanding native resampling with 4D data with no dimensions specified."""
from satpy.resample import NativeResampler
import dask.array as da
from xarray import DataArray
from pyresample.geometry import AreaDefinition
from pyresample.utils import proj4_str_to_dict
ds1 = DataArray(da.zeros((2, 3, 100, 50), chunks=85))
proj_dict = proj4_str_to_dict('+proj=lcc +datum=WGS84 +ellps=WGS84 '
'+lon_0=-95. +lat_0=25 +lat_1=25 '
'+units=m +no_defs')
target = AreaDefinition(
'test',
'test',
'test',
proj_dict,
x_size=100,
y_size=200,
area_extent=(-1000., -1500., 1000., 1500.),
)
# source geo def doesn't actually matter
resampler = NativeResampler(None, target)
self.assertRaises(ValueError, resampler.resample, ds1)
