def get_terrain(self):
slope_name = os.path.join(self.root, 'slope.tif')
aspect_name = os.path.join(self.root, 'aspect.tif')
dif_elev = os.path.join(self.root, 'elevation_diff.tif')
check = [
os.path.isfile(x) for x in [slope_name, aspect_name, dif_elev]
]
if False in check:
polygon = self.landsat.get_tile_geometry()
bb = RasterBounds(affine_transform=self.profile['transform'],
profile=self.profile,
latlon=True)
dem = AwsDem(zoom=10,
target_profile=self.profile,
bounds=bb,
clip_object=polygon)
dem.terrain(attribute='slope',
out_file=slope_name,
save_and_return=True)
dem.terrain(attribute='aspect',
out_file=aspect_name,
save_and_return=True)
elev = dem.terrain(attribute='elevation')
elev = elev - mean(elev)
dem.save(elev,
geometry=dem.target_profile,
output_filename=dif_elev)
def get_terrain(self):
"""
Get digital elevation maps from amazon web services
save in the project root directory with filenames enumerated
in the next three lines.
"""
slope_name = os.path.join(self.root, 'slope.tif')
aspect_name = os.path.join(self.root, 'aspect.tif')
dif_elev = os.path.join(self.root, 'elevation_diff.tif')
check = [os.path.isfile(x) for x in [slope_name, aspect_name, dif_elev]]
if False in check:
polygon = self.landsat.get_tile_geometry()
bb = RasterBounds(affine_transform=self.profile['transform'],
profile=self.profile, latlon=True)
dem = AwsDem(zoom=10, target_profile=self.profile, bounds=bb,
clip_object=polygon)
dem.terrain(attribute='slope',
out_file=slope_name, save_and_return=True)
dem.terrain(attribute='aspect',
out_file=aspect_name, save_and_return=True)
elev = dem.terrain(attribute='elevation')
elev = elev - mean(elev)
dem.save(elev, geometry=dem.target_profile, output_filename=dif_elev)
def test_dem(self):
l8 = Landsat8(self.dir_name_LC8)
polygon = l8.get_tile_geometry()
profile = l8.rasterio_geometry
bb = RasterBounds(affine_transform=profile['affine'],
profile=profile,
latlon=True)
dem = AwsDem(zoom=10,
target_profile=profile,
bounds=bb,
clip_object=polygon)
elev = dem.terrain(
attribute='slope',
out_file='/home/dgketchum/IrrigationGIS/tests/mapzen_'
'{}_{}.tif'.format(l8.target_wrs_path, l8.target_wrs_row))
self.assertEqual(elev.shape, (1, 7429, 8163))
aspect = dem.terrain(attribute='aspect')
self.assertEqual(aspect.shape, (7429, 8163))
slope = dem.terrain(attribute='slope')
self.assertEqual(slope.shape, (1, 7429, 8163))
def fetch_dem(self):
dem = AwsDem(bounds=self.bounds, clip_object=self.clip_geo,
target_profile=self.profile, zoom=8)
var = dem.terrain(attribute='elevation', out_file=self.file_path,
save_and_return=True)
return var