def run_gdaldem(filepath: str, processing: str, options: str | None = None) -> np.ma.masked_array:
"""Run GDAL's DEMProcessing and return the read numpy array."""
# Rasterio strongly recommends against importing gdal along rio, so this is done here instead.
from osgeo import gdal
# Converting string into gdal processing options here to avoid import gdal outside this function:
# Riley or Wilson for Terrain Ruggedness, and Zevenberg or Horn for slope, aspect and hillshade
gdal_option_conversion = {
"Riley": gdal.DEMProcessingOptions(alg="Riley"),
"Wilson": gdal.DEMProcessingOptions(alg="Wilson"),
"Zevenberg": gdal.DEMProcessingOptions(alg="ZevenbergenThorne"),
"Horn": gdal.DEMProcessingOptions(alg="Horn"),
"hillshade_Zevenberg": gdal.DEMProcessingOptions(azimuth=315, altitude=45, alg="ZevenbergenThorne"),
"hillshade_Horn": gdal.DEMProcessingOptions(azimuth=315, altitude=45, alg="Horn")
}
if options is None:
gdal_option = gdal.DEMProcessingOptions(options=None)
else:
gdal_option = gdal_option_conversion[options]
temp_dir = tempfile.TemporaryDirectory()
temp_path = os.path.join(temp_dir.name, "output.tif")
gdal.DEMProcessing(
destName=temp_path,
srcDS=filepath,
processing=processing,
options=gdal_option,
)
data = gu.Raster(temp_path).data
temp_dir.cleanup()
return data
def process(out_filepath, src_filepath, process_type, color_file=None):
"""
Transform src raster file and output to new raster file
Args:
output_file: File path for output file
src_filepath: File path for source raster file
process_type: Type of process to apply
"""
options = gdal.DEMProcessingOptions(zeroForFlat=True, colorFilename=color_file)
dataset = gdal.DEMProcessing(out_filepath, src_filepath, process_type, options=options)
logging.info("Dataset Processed: {}".format(out_filepath))
dataset = None
def calc_aspect(elev, proc_dims=None, w=None, **kwargs):
"""
Calculates aspect from elevation
Args:
elev (2d array): The elevation data.
proc_dims (Optional[tuple]): Dimensions to resize to.
w (Optional[int]): The smoothing window size when ``proc_dims`` is given.
kwargs (Optional[dict]): Keyword arguments passed to ``gdal.DEMProcessingOptions``.
Returns:
``numpy.ndarray``
"""
if not OPENCV_INSTALLED:
logger.exception('OpenCV must be installed.')
if proc_dims:
inrows, incols = elev.shape
elev = cv2.resize(elev.astype('float32'),
proc_dims,
interpolation=cv2.INTER_LINEAR)
ds = gdal_array.OpenArray(elev.astype('float64'))
aspect_options = gdal.DEMProcessingOptions(**kwargs)
out_ds = gdal.DEMProcessing('', ds, 'aspect', options=aspect_options)
dst_array = out_ds.GetRasterBand(1).ReadAsArray()
ds = None
out_ds = None
if proc_dims:
dst_array = cv2.resize(dst_array.astype('float32'), (incols, inrows),
interpolation=cv2.INTER_LINEAR)
if not w:
w = 15
return np.float64(cv2.bilateralFilter(np.float32(dst_array), w, 10,
10))
else:
return np.float64(dst_array)
def run_gdaldem(filepath: str, processing: str) -> np.ma.masked_array:
"""Run GDAL's DEMProcessing and return the read numpy array."""
# rasterio strongly recommends against importing gdal along rio, so this is done here instead.
from osgeo import gdal
temp_dir = tempfile.TemporaryDirectory()
temp_path = os.path.join(temp_dir.name, "output.tif")
gdal.DEMProcessing(
destName=temp_path,
srcDS=filepath,
processing=processing,
options=gdal.DEMProcessingOptions(azimuth=315, altitude=45),
)
data = gu.Raster(temp_path).data
temp_dir.cleanup()
return data
def _compute_slope(self, out_raster, slope_format):
with GdalOpen(self.raster_file) as src_ds:
options = gdal.DEMProcessingOptions(slopeFormat=slope_format)
gdal.DEMProcessing(out_raster, src_ds, 'slope', options=options)
def create_dmp(aoi_model, model, output):
output.add_live_msg('Initializing DPM creation')
# create start date from 60 days before
event_start = dt.strptime(model.event_start, "%Y-%m-%d")
event_end = dt.strptime(model.event_end, "%Y-%m-%d")
# set a period around start and end date for data search
search_start = dt.strftime(event_start + timedelta(days=-60), '%Y-%m-%d')
search_end = dt.strftime(event_end + timedelta(days=30), '%Y-%m-%d')
# define project dir
if event_start == event_end:
project_dir = pm.result_dir / f"{aoi_model.name}_{model.event_start}"
else:
project_dir = pm.result_dir / f"{aoi_model.name}_{model.event_start}_{model.event_end}"
aoi = aoi_model.gdf.dissolve().geometry.to_wkt().values[0]
output.add_live_msg(" Setting up OST project")
s1_slc = Sentinel1Batch(
project_dir=project_dir,
aoi=aoi,
start=search_start,
end=search_end,
product_type="SLC",
ard_type="OST-RTC",
)
# set tmp_dir
s1_slc.temp_dir = pm.tmp_dir
s1_slc.config_dict["temp_dir"] = pm.tmp_dir
## we get available ram
#with open('/proc/meminfo') as f:
# meminfo = f.read()
# matched = re.search(r'^MemTotal:\s+(\d+)', meminfo)
#
#if matched:
# mem_total_kB = int(matched.groups()[0])
#
## if we have more than 100GB ram we download there,
## that should speed up processing
#if mem_total_kB/1024/1024 > 100:
# print('Using ramdisk')
# s1_slc.download_dir = '/ram/download'
# Path(s1_slc.download_dir).mkdir(parents=True, exist_ok=True)
# s1_slc.config_dict['download_dir'] = s1_slc.download_dir
# get username and password
from ost.helpers.settings import HERBERT_USER
if model.username and model.password:
s1_slc.scihub_uname = model.username
s1_slc.scihub_pword = model.password
else:
s1_slc.scihub_uname = HERBERT_USER["uname"]
s1_slc.scihub_pword = HERBERT_USER["pword"]
s1_slc.asf_uname = HERBERT_USER["uname"]
s1_slc.asf_pword = HERBERT_USER["asf_pword"]
output.add_live_msg(" Searching for data")
s1_slc.search(base_url="https://scihub.copernicus.eu/dhus/")
for i, track in enumerate(s1_slc.inventory.relativeorbit.unique()):
# filter by track
df = s1_slc.inventory[s1_slc.inventory.relativeorbit == track].copy()
# make sure all products are on ASF
for i, row in df.iterrows():
status = check_product_on_asf(row.identifier, s1_slc.asf_uname,
s1_slc.asf_pword)
if status != 200:
df = df[df.identifier != row.identifier]
# get all acquisitions dates for that track
datelist = sorted([
dt.strptime(date, '%Y%m%d')
for date in df.acquisitiondate.unique()
])
to_process_list = []
for date in datelist:
# cehck if we have an image after end date
if datelist[-1] < event_end:
output.add_live_msg(
f' No image available after the end date for track {track}'
)
break
# ignore dates before start of event
if date < event_start:
continue
# get index of date in datelist
idx = datelist.index(date)
if idx < 2:
output.add_live_msg(
f' Not enough pre-event images available for track {track}'
)
break
# add dates to process list, if not already there
# we take care of the two images needed before the start date
[
to_process_list.append(date)
for date in datelist[idx - 2:idx + 1]
if date not in to_process_list
]
# once we added the last image after the the end of the event we can stop
if date >= event_end:
break
if len(to_process_list) < 3:
output.add_live_msg(
f' Not enough images available for track {track}')
break
# turn the dates back to strings so we can use to filter the data inventory
final_dates = [dt.strftime(date, '%Y%m%d') for date in to_process_list]
final_df = df[df.acquisitiondate.isin(final_dates)]
output.add_live_msg(
" Downloading relevant Sentinel-1 SLC scenes ... (this may take a while)"
)
s1_slc.download(
final_df,
mirror=2,
concurrent=10,
uname=s1_slc.asf_uname,
pword=s1_slc.asf_pword,
)
output.add_live_msg(" Create burst inventory")
s1_slc.create_burst_inventory(final_df)
# setting ARD parameters
output.add_live_msg(" Setting processing parameters")
s1_slc.ard_parameters["single_ARD"]["resolution"] = 30 # in metres
s1_slc.ard_parameters["single_ARD"]["create_ls_mask"] = False
s1_slc.ard_parameters["single_ARD"]["backscatter"] = False
s1_slc.ard_parameters["single_ARD"]["coherence"] = True
s1_slc.ard_parameters["single_ARD"][
"coherence_bands"] = "VV" # 'VV, VH'
# production of polarimetric layers
s1_slc.ard_parameters["single_ARD"][
"H-A-Alpha"] = False # does not give a lot of additional information
# resampling of image (not so important)
s1_slc.ard_parameters['single_ARD']['dem'][
'dem_name'] = "SRTM 1Sec HGT"
s1_slc.ard_parameters['single_ARD']['dem'][
'image_resampling'] = 'BILINEAR_INTERPOLATION' # 'BILINEAR_INTERPOLATION'
# multi-temporal speckle filtering is quite effective
s1_slc.ard_parameters['time-series_ARD']['mt_speckle_filter'][
'filter'] = 'Boxcar'
s1_slc.ard_parameters['time-series_ARD']['remove_mt_speckle'] = True
s1_slc.ard_parameters['time-scan_ARD']['metrics'] = ['min', 'max']
s1_slc.ard_parameters['time-scan_ARD']['remove_outliers'] = False
s1_slc.ard_parameters['mosaic']['cut_to_aoi'] = True
# set number of parallel processing
workers = int(4) if os.cpu_count() / 4 > 4 else int(os.cpu_count() / 4)
output.add_live_msg(f" Processing {workers} bursts in parallel.")
s1_slc.config_dict["max_workers"] = workers
s1_slc.config_dict["executor_type"] = "concurrent_processes"
# set tmp_dir
s1_slc.config_dict['temp_dir'] = '/ram'
# pre-download SRTM
srtm.download_srtm(s1_slc.aoi)
# process
output.add_live_msg(" Processing scenes... (this may take a while)")
s1_slc.bursts_to_ards(
timeseries=True,
timescan=True,
mosaic=False,
overwrite=False # TO BE CHAGNED
)
output.add_live_msg(" Calculate coherent change for each burst")
bursts = list(s1_slc.processing_dir.glob(f'[A,D]*{track}*'))
for burst in bursts:
# get track
track_name = burst.name[:4]
# in and out files
coh_min = burst.joinpath('Timescan/01.coh.VV.min.tif')
coh_max = burst.joinpath('Timescan/02.coh.VV.max.tif')
dstnt_file = burst.joinpath(f"Timescan/ccd_{burst.name}.tif")
with rio.open(coh_max) as pre_coh:
pre_arr = pre_coh.read()
# get metadata for destination file
meta = pre_coh.meta
meta.update(dtype='uint8', nodata=0)
with rio.open(coh_min) as post_coh:
post_arr = post_coh.read()
# calulate difference
coh_diff = np.subtract(pre_arr, post_arr)
coh_diff[coh_diff < 0.27] = 0
coh_diff = coh_diff * 100
with rio.open(dstnt_file, 'w', **meta) as dstnt:
dstnt.write(coh_diff.astype('uint8'))
# -----------------------------------------
# and merge the result
src_files_to_mosaic = []
for file in s1_slc.processing_dir.glob(
f"*[A,D]*{track}_*/Timescan/ccd*tif"):
src = rio.open(file)
src_files_to_mosaic.append(src)
mosaic, out_trans = merge(src_files_to_mosaic)
out_meta = src.profile.copy()
# Update the metadata
out_meta.update(driver='GTiff',
height=mosaic.shape[1],
width=mosaic.shape[2],
transform=out_trans,
crs=src.crs,
tiled=True,
blockxsize=128,
blockysize=128,
compress='lzw')
tmp_dir = Path(s1_slc.config_dict['temp_dir'])
tmp_mrg = tmp_dir.joinpath(f"ccd_{track_name}.tif")
with rio.open(tmp_mrg, "w", **out_meta) as dest:
dest.write(mosaic)
# close datasets
[src.close for src in src_files_to_mosaic]
# crop to aoi (some ost routine)
shapes_ = [row.geometry for _, row in aoi_model.gdf.iterrows()]
with rio.open(tmp_mrg) as src:
out_image, out_transform = rio.mask.mask(src, shapes_, crop=True)
out_meta = src.profile
out_meta.update({
"driver": "GTiff",
"height": out_image.shape[1],
"width": out_image.shape[2],
"transform": out_transform,
})
# create final output directory
dpm_out_dir = project_dir / f"Damage_Proxy_Maps"
dpm_out_dir.mkdir(parents=True, exist_ok=True)
out_ds_tif = dpm_out_dir / f"ccd_{track_name}.tif"
with rio.open(out_ds_tif, "w", **out_meta) as dest:
dest.write(out_image)
# delete tmpmerge
tmp_mrg.unlink()
# -----------------------------------------
# -----------------------------------------
# kmz and dmp output
# write a color file to tmp
ctfile = tmp_dir.joinpath("colourtable.txt")
f = open(ctfile, "w")
ct = [
"0 0 0 0 0\n"
"27 253 246 50 255\n"
"35 253 169 50 255\n"
"43 253 100 50 255\n"
"51 253 50 50 255\n"
"59 255 10 10 255\n"
"255 253 0 0 255"
]
f.writelines(ct)
f.close()
out_dpm_tif = dpm_out_dir / f"dpm_{track_name}.tif"
demopts = gdal.DEMProcessingOptions(colorFilename=str(ctfile),
addAlpha=True)
gdal.DEMProcessing(str(out_dpm_tif),
str(out_ds_tif),
"color-relief",
options=demopts)
opts = gdal.TranslateOptions(format="KMLSUPEROVERLAY",
creationOptions=["format=png"])
gdal.Translate(str(out_dpm_tif.with_suffix(".kmz")),
str(out_dpm_tif),
options=opts)
### adding legend like this to KMZ
# added = [
# "\t\t<ScreenOverlay>\n",
# "\t\t\t<name>\n",
# "Legend: Damage Proxy Map\n",
# "\t\t\t</name>\n",
# "\t\t\t<Icon>\n",
# "\t\t\t\t<href>https://raw.githubusercontent.com/12rambau/damage_proxy_map/refactoring/component/message/legend.png</href>\n",
# "\t\t\t</Icon>\n",
# '\t\t\t<overlayXY x="0.98" y="0.14" xunits="fraction" yunits="fraction"/>\n',
# '\t\t\t<screenXY x="0.98" y="0.14" xunits="fraction" yunits="fraction"/>\n',
# '\t\t\t<rotationXY x="0.5" y="0.5" xunits="fraction" yunits="fraction"/>\n',
# '\t\t\t<size x="0.1" y="0.18" xunits="fraction" yunits="fraction"/>\n',
# "\t\t</ScreenOverlay>\n",
# "\t</Document>\n",
# "</kml>\n"
# ]
# tmpzip = tmp_dir.joinpath('zipped')
# tmpzip.mkdir(parents=True, exist_ok=True)
#
# with ZipFile(out_dmp_tif.with_suffix('.kmz')) as zip_ref:
# zip_ref.extractall(tmpzip)
# with open(tmpzip.joinpath('doc.kml')) as f:
#
# lines = f.readlines()
# lines = lines[:-2]
# lines.extend(added)
#
# with open(tmpzip.joinpath('doc.kml'), 'w') as f:
# for ele in lines:
# f.write(ele)
#
# with ZipFile(out_dmp_tif.with_suffix('.kmz'), 'w') as zip_ref:
# # Iterate over all the files in directory
# for folderName, subfolders, filenames in os.walk(tmpzip):
# for filename in filenames:
# #create complete filepath of file in directory
# filePath = os.path.join(folderName, filename)
# # Add file to zip
# zip_ref.write(filePath, os.path.join('/0/0/', os.path.basename(filePath)))
# # -----------------------------------------
# -----------------------------------------
# polygonize (to points)
with rio.open(out_ds_tif) as src:
image = src.read()
mask = image != 0
geoms = [{
"properties": {
"raster_val": v
},
"geometry": s
} for i, (s, v) in enumerate(
shapes(image, mask=mask, transform=src.transform))]
# geoms = list(results)
gpd_polygonized_raster = gpd.GeoDataFrame.from_features(geoms)
gpd_polygonized_raster["geometry"] = gpd_polygonized_raster[
"geometry"].centroid
gpd_polygonized_raster.to_file(out_dpm_tif.with_suffix(".geojson"),
driver="GeoJSON")
# remove storage intense files
try:
[
file.unlink()
for file in Path(s1_slc.download_dir).glob("**/*zip")
]
[
file.unlink()
for file in Path(s1_slc.download_dir).glob("**/*downloaded")
]
[
file.unlink()
for file in Path(s1_slc.processing_dir).glob("**/*img")
]
[
file.unlink()
for file in Path(s1_slc.processing_dir).glob("**/*tif")
]
[
file.unlink()
for file in Path(s1_slc.processing_dir).glob("**/*processed")
]
except:
pass
# -----------------------------------------
try:
shutil.rmtree(s1_slc.download_dir)
shutil.rmtree(s1_slc.processing_dir)
except:
pass
return
def calculate_ancillary_products(flight_dict, nodata=-9999.0):
msk_fn = Path(flight_dict['background_mask_file'])
dem_fn = Path(flight_dict['merged_dem_file'])
sca_fn = Path(flight_dict['merged_sca_file'])
# Get flightline basename
basename = '_'.join(os.path.basename(msk_fn).split('_')[:2])
# Read the background mask
msk_ds = gdal.Open(str(msk_fn))
msk = msk_ds.GetRasterBand(1).ReadAsArray().astype(bool)
# While the dataset is open, grab the geotransform array
gt = msk_ds.GetGeoTransform()
msk_ds = None
# Calculate DEM aspect
aspect_option = gdal.DEMProcessingOptions(trigonometric=False,
computeEdges=True)
aspect_ds = gdal.DEMProcessing(f'/vsimem/_tmp_{basename}_Aspect.tif',
str(dem_fn),
'aspect',
options=aspect_option)
# Calculate DEM slope
slope_option = gdal.DEMProcessingOptions(computeEdges=True)
slope_ds = gdal.DEMProcessing(f'/vsimem/_tmp_{basename}_Slope.tif',
str(dem_fn),
'slope',
options=slope_option)
# Convert slope & aspect to radians
dem_aspect = np.radians(aspect_ds.GetRasterBand(1).ReadAsArray())
dem_slope = np.radians(slope_ds.GetRasterBand(1).ReadAsArray())
# Close temporary files
aspect_ds = None
slope_ds = None
# Load SCA image header
sca_hdr = read_envi_header(sca_fn.with_suffix('.hdr'))
# Read SCA image
sca_shape = (sca_hdr['bands'], sca_hdr['lines'], sca_hdr['samples'])
sca_image = np.memmap(sca_fn, dtype='float32', mode='r', shape=sca_shape)
# Get sensor viewing angles from SCA image
view_zenith = np.radians(sca_image[0])
view_azimuth = np.radians(sca_image[1])
# Calculate solar angles
solar_zenith = np.radians(float(sca_hdr['sun zenith']))
solar_azimuth = np.radians(float(sca_hdr['sun azimuth']))
relative_azimuth = dem_aspect - solar_azimuth
# Generate flat SZA image
sza_image = np.full_like(view_zenith, nodata)
sza_image[~msk] = solar_zenith
# Generate flat SAA image
saa_image = np.full_like(view_azimuth, nodata)
saa_image[~msk] = solar_azimuth
# Cosine of I
cos_i = (
np.cos(solar_zenith) * np.cos(dem_slope) +
np.sin(solar_zenith) * np.sin(dem_slope) * np.cos(relative_azimuth))
# Phase
# Wanner et al. JGRA 1995, eq. 51
# Schlapfer et al. IEEE-TGARS 2015, eq. 2
cos_phase = np.cos(solar_zenith) * np.cos(view_zenith) + np.sin(
solar_zenith) * np.sin(view_zenith) * np.cos(relative_azimuth)
phase = np.arccos(cos_phase)
# Set no data values
dem_aspect[msk] = nodata
dem_slope[msk] = nodata
view_zenith[msk] = nodata
view_azimuth[msk] = nodata
relative_azimuth[msk] = nodata
cos_i[msk] = nodata
# Get SRS
srs = osr.SpatialReference()
srs.ImportFromWkt(sca_hdr['coordinate system string'])
anc_dir = Path(flight_dict['merge_dir']) / 'ancillary'
anc_dir.mkdir(exist_ok=True)
# Write DEM slope
slope_hdr = make_ancillary_header(dem_slope.shape,
srs,
gt,
descr='DEM slope, in [rad]',
nodata=-9999.0)
write_to_envi(anc_dir / f'{basename}_DSMSlope', dem_slope, slope_hdr)
# Write DSM aspect
aspect_hdr = make_ancillary_header(dem_aspect.shape,
srs,
gt,
descr='DEM aspect, in [rad]',
nodata=-9999.0)
write_to_envi(anc_dir / f'{basename}_DSMAspect', dem_aspect, aspect_hdr)
# Write sensor zenith angles
vza_hdr = make_ancillary_header(
view_zenith.shape,
srs,
gt,
descr='Sensor viewing zenith angle, in [rad]',
nodata=-9999.0)
write_to_envi(anc_dir / f'{basename}_VZA', view_zenith, vza_hdr)
# Write sensor azimuth angles
vaa_hdr = make_ancillary_header(
view_azimuth.shape,
srs,
gt,
descr='Sensor viewing azimuth angle, in [rad]',
nodata=-9999.0)
write_to_envi(anc_dir / f'{basename}_VAA', view_azimuth, vaa_hdr)
# Write solar zenith angle
sza_hdr = make_ancillary_header(sza_image.shape,
srs,
gt,
descr='Solar zenith angle, in [rad]',
nodata=-9999.0)
write_to_envi(anc_dir / f'{basename}_SZA', sza_image, sza_hdr)
# Write solar azimuth angle
saa_hdr = make_ancillary_header(saa_image.shape,
srs,
gt,
descr='Solar azimuth angle, in [rad]',
nodata=-9999.0)
write_to_envi(anc_dir / f'{basename}_SAA', saa_image, saa_hdr)
# Write relative azimuth
raa_hdr = make_ancillary_header(
relative_azimuth.shape,
srs,
gt,
descr='Relative viewing azimuth angle, in [rad]',
nodata=-9999.0)
write_to_envi(anc_dir / f'{basename}_RAA', relative_azimuth, raa_hdr)
# Write cosine I
cosi_hdr = make_ancillary_header(cos_i.shape,
srs,
gt,
descr='Cosine of I',
nodata=-9999.0)
write_to_envi(anc_dir / f'{basename}_CosI', cos_i, cosi_hdr)
# Write phase
phase_hdr = make_ancillary_header(phase.shape,
srs,
gt,
descr='Phase',
nodata=-9999.0)
write_to_envi(anc_dir / f'{basename}_Phase', phase, phase_hdr)
