def woffles(source, pq, dsm):
"""Generate a Water Observation Feature Layer from NBAR, PQ and surface elevation inputs."""
water = classifier.classify(source.to_array(dim='band')) \
| filters.eo_filter(source) \
| filters.pq_filter(pq.pqa) \
| filters.terrain_filter(dsm, source)
assert water.dtype == np.uint8
return water
def woffles(nbar, pq, dsm):
"""Generate a Water Observation Feature Layer from NBAR, PQ and surface elevation inputs."""
water = classifier.classify(nbar.to_array(dim='band')) \
| filters.eo_filter(nbar) \
| filters.pq_filter(pq.pqa) \
| filters.terrain_filter(dsm, nbar)
_fix_nodata_to_single_value(water)
assert water.dtype == np.uint8
return water
def _classify(data):
"""
performs WOFS classification on an xarray
:param xarray data: An xarray of a single granule including bands: blue, green, red, nir, swir1, swir2
:return: xarray water
"""
logging.info('Classifying dataset')
water = classifier.classify(data).to_dataset(dim="water")
logging.info('Classification complete')
logging.debug(water)
water.attrs['crs'] = geometry.CRS(data.attrs['crs'])
logging.debug('Set CRS to: %s', data.attrs['crs'])
return water
def woffles_usgs_c2(c2, dsm):
"""Generate a Water Observation Feature Layer from USGS Collection 2 and surface elevation inputs."""
nbar_bands = spectral_bands(c2)
water = classifier.classify(nbar_bands) \
| eo_filter(c2) \
| c2_filter(c2.fmask)
if dsm is not None:
# terrain_filter arbitrarily expects a band named 'blue'
water |= terrain_filter(dsm, c2.rename({"nbart_blue": "blue"}))
_fix_nodata_to_single_value(water)
assert water.dtype == np.uint8
return water
def woffles_ard(ard, dsm):
"""Generate a Water Observation Feature Layer from ARD (NBART and FMASK) and surface elevation inputs."""
nbar_bands = spectral_bands(ard)
water = classifier.classify(nbar_bands) \
| eo_filter(ard) \
| fmask_filter(ard.fmask)
if dsm is not None:
# terrain_filter arbitrarily expects a band named 'blue'
water |= terrain_filter(dsm, ard.rename({"nbart_blue": "blue"}))
_fix_nodata_to_single_value(water)
assert water.dtype == np.uint8
return water
