def test_gdal_merge_optfile(self):
datasets, written = [], []
init = np.zeros((2, 2), np.int16)
path = os.path.join(os.getcwd(), "test_gdal_merge_optfile.tif")
ImageIO.write_geotiff(init, path, self.projection, self.coordinates)
ds_in = GDalDatasetWrapper.from_file(path)
for i in range(1, 3, 1):
img = np.ones((i*2, i*2), np.int16) * i
ds_n = GDalDatasetWrapper(ds=ds_in.get_ds(), array=img)
p_out = "test_gdal_merge_optfile_%s.tif" % i
ImageIO.write_geotiff_existing(img, p_out, ds_in.get_ds())
self.assertTrue(os.path.exists(path))
datasets.append(ds_n)
written.append(p_out)
optfile = "test_gdal_merge_optfile.txt"
with open(optfile, 'w') as file_handler:
for item in written:
file_handler.write("{}\n".format(item))
ds_merged = ImageTools.gdal_merge(*datasets,
q=True,
a_nodata=0)
ds_optfile = ImageTools.gdal_merge(optfile=optfile,
q=True,
a_nodata=0)
# Array of shape (4, 4):
expected = np.array([[2, 2, 2, 2],
[2, 2, 2, 2],
[2, 2, 2, 2],
[2, 2, 2, 2]], dtype=np.int16)
FileSystem.remove_file(path)
[FileSystem.remove_file(p) for p in written]
FileSystem.remove_file(optfile)
np.testing.assert_equal(expected.dtype, ds_merged.array.dtype)
np.testing.assert_almost_equal(expected, ds_merged.array)
self.assertEqual(ds_merged.nodata_value, 0)
self.assertEqual(ds_merged.epsg, 32631)
np.testing.assert_equal(expected.dtype, ds_optfile.array.dtype)
np.testing.assert_almost_equal(expected, ds_optfile.array)
self.assertEqual(ds_optfile.nodata_value, 0)
self.assertEqual(ds_optfile.epsg, 32631)
def prepare_mnt(self):
"""
Prepare the eudem files.
:return: Path to the full resolution DEM file.gsw
:rtype: str
"""
# Find/Download EuDEM archives:
eudem_files = self.get_raw_data()
# Unzip the downloaded/found EuDEM zip files:
unzipped = []
for arch in eudem_files:
basename = os.path.splitext(os.path.basename(arch))[0]
FileSystem.unzip(arch, self.wdir)
fn_unzipped = FileSystem.find_single(pattern=basename + ".TIF$",
path=self.wdir)
unzipped.append(fn_unzipped)
# Fusion of all EuDEM files
ds_cropped = []
for fn in unzipped:
ds = ImageTools.gdal_warp(fn,
of="GTiff",
ot="Int16",
r="cubic",
te=self.site.te_str,
t_srs=self.site.epsg_str,
tr=self.site.tr_str,
multi=True)
ds.array[ds.array < self.lowest_allowed_height] = -32767
ds_cropped.append(ds)
eudem_full_res = os.path.join(self.wdir,
"eudem_%sm.tif" % int(self.site.res_x))
ImageTools.gdal_merge(*ds_cropped,
dst=eudem_full_res,
n=-32767,
a_nodata=0,
q=True)
return eudem_full_res
def test_merge_then_translate(self):
datasets = []
init = np.zeros((2, 2), np.int16)
path = os.path.join(os.getcwd(), "test_gdal_merge.tif")
ImageIO.write_geotiff(init, path, self.projection, self.coordinates)
ds_in = GDalDatasetWrapper.from_file(path)
for i in range(1, 3, 1):
img = np.ones((i*2, i*2), np.int16) * i
ds_n = GDalDatasetWrapper(ds=ds_in.get_ds(), array=img)
self.assertTrue(os.path.exists(path))
datasets.append(ds_n)
ds_merged = ImageTools.gdal_merge(*datasets, dst="out.tif",
separate=True,
q=True,
a_nodata=0)
# Array of shape (4, 4, 2):
expected = np.array([[[1, 2],
[1, 2],
[0, 2],
[0, 2]],
[[1, 2],
[1, 2],
[0, 2],
[0, 2]],
[[0, 2],
[0, 2],
[0, 2],
[0, 2]],
[[0, 2],
[0, 2],
[0, 2],
[0, 2]]], dtype=np.int16)
FileSystem.remove_file("out.tif")
np.testing.assert_equal(expected.dtype, ds_merged.array.dtype)
np.testing.assert_almost_equal(expected, ds_merged.array)
self.assertEqual(ds_merged.nodata_value, 0)
self.assertEqual(ds_merged.epsg, 32631)
ds_translate = ImageTools.gdal_translate(ds_merged,
a_nodata=0)
FileSystem.remove_file(path)
np.testing.assert_equal(expected.dtype, ds_translate.array.dtype)
np.testing.assert_almost_equal(ds_translate.array, expected)
self.assertEqual(ds_translate.nodata_value, 0)
self.assertEqual(ds_translate.epsg, 32631)
