def read_metadata(xmlbuffer):
# Speciel decoders
def dec_isoformat(rts):
return datetime.strptime(rts, "%Y-%m-%dT%H:%M:%S.%fZ")
def dec_orbit_number(rts):
return int(rts[:5])
def dec_satellite_name(rts):
return rts.replace('-', '')
def dec_calibration_unit(rts):
_trans = {'radar brightness': 'nrcs'}
rts = rts.replace(' ', '-').lower()
return rts
attributes = {
'product_level': ('generalHeader/itemName', str),
'satellite_name': ('productInfo/missionInfo/mission', dec_satellite_name),
'orbit_number': ('productInfo/missionInfo/absOrbit', dec_orbit_number),
'sensor_type': ('productInfo/acquisitionInfo/sensor', str),
'beam_mode': ('productInfo/acquisitionInfo/imagingMode', str),
'polarisation': ('productInfo/acquisitionInfo/polarisationList/polLayer', str),
'beamid': ('productInfo/acquisitionInfo/elevationBeamConfiguration', str),
'calibrated': ('productInfo/productVariantInfo/radiometricCorrection', str),
'calibration_factor': ('calibration/calibrationConstant/calFactor', float),
'calibration_beamid': ('calibration/calibrationConstant/beamID', str),
'calibration_unit': ('productInfo/imageDataInfo/pixelValueID', dec_calibration_unit),
'image_data_path': ('productComponents/imageData/file/location/path', str),
'image_data_filename': ('productComponents/imageData/file/location/filename', str),
'time_start': ('productInfo/sceneInfo/start/timeUTC', dec_isoformat),
'center_coor_lat': ('productInfo/sceneInfo/sceneCenterCoord/lat', float),
'center_coor_lon': ('productInfo/sceneInfo/sceneCenterCoord/lon', float)
}
check_attributes = {'product_level': 'level 1b product',
'satellite_name': 'tsx',
'sensor_type': 'sar'}
tree = etree.fromstring(xmlbuffer)
# Check satellite, sensor and product level
for key, val in check_attributes.items():
try:
path = attributes[key][0]
attr = tree.xpath(path)[0].text.lower()
if not attr.startswith(val):
raise mipp.ReaderError("This does not look like a TSX SAR " +
"Level 1B Product, %s is '%s' expected '%s'" %
(key, attr, val))
except IndexError:
raise mipp.ReaderError("This does not look like a TSX SAR " +
"Level 1B Product, could not find attribute '%s' (%s)" %
(key, path))
mda = Metadata()
for key, val in attributes.items():
setattr(mda, key, val[1](tree.xpath(val[0])[0].text))
mda.image_filename = (mda.image_data_path + '/' + mda.image_data_filename)
delattr(mda, 'image_data_path')
delattr(mda, 'image_data_filename')
return mda
def read_manifest(filename, **mdax):
"""Read a Sentinel-1 manifest file, and extract selected parameters.
:Parameters:
filename : str
Path to manifest file.
:Returns:
manifest : Metadata object
Selected paramters
"""
def parse_orbit(elm):
if elm.get('type').lower() == 'start':
return int(elm.text)
def parse_text(elm):
return elm.text
def parse_tolower(elm):
return elm.text.lower()
def parse_satellite(elm):
if elm.text.lower().startswith('sen'):
return elm.text.lower()
def parse_time(elm):
return datetime.strptime(elm.text, "%Y-%m-%dT%H:%M:%S.%f")
def parse_coordinates(elm):
cor = elm.text.split()
arr = []
for c in cor:
y, x = [float(i) for i in c.split(',')]
arr.append((x, y))
return arr
def parse_files(elm):
fname = elm.get('href')
if fname and fname.startswith('./measurement/'):
return os.path.join(basedir, fname[2:])
named_decoder = {
'{http://www.esa.int/safe/sentinel-1.0}startTime': (
'start_time', 1, parse_time),
'{http://www.esa.int/safe/sentinel-1.0}stopTime': (
'stop_time', 1, parse_time),
'{http://www.opengis.net/gml}coordinates': (
'coordinates', 1, parse_coordinates),
'{http://www.esa.int/safe/sentinel-1.0}orbitNumber': (
'orbit_number', 1, parse_orbit),
'{http://www.esa.int/safe/sentinel-1.0/sentinel-1/sar/level-1}mode': (
'instrument_mode', 1, parse_tolower),
'{http://www.esa.int/safe/sentinel-1.0}familyName': (
'satellite', 1, parse_satellite), # dublicated !
'{http://www.esa.int/safe/sentinel-1.0/sentinel-1}pass': (
'pass', 1, parse_tolower),
'{http://www.esa.int/safe/sentinel-1.0/sentinel-1/sar/level-1}transmitterReceiverPolarisation': (
'polarisations', 2, parse_tolower),
'{http://www.esa.int/safe/sentinel-1.0/sentinel-1/sar/level-1}productClassDescription': (
'description', 1, parse_text),
'{http://www.esa.int/safe/sentinel-1.0/sentinel-1/sar/level-1}productType': (
'product_type', 1, parse_tolower),
'fileLocation': (
'files', 2, parse_files),
}
tags = named_decoder.keys()
manifest = Metadata()
basedir = os.path.dirname(filename)
with open(filename) as fp:
xml = etree.parse(fp)
for e in xml.getroot().iter():
if e.tag in tags:
name, count, decoder = named_decoder[e.tag]
value = decoder(e)
if value:
if count > 1:
try:
getattr(manifest, name).append(value)
except AttributeError:
setattr(manifest, name, [value])
else:
setattr(manifest, name, value)
# Add extra metadata
for key, val in mdax.items():
if not hasattr(manifest, key):
setattr(manifest, key, val)
try:
resolution = manifest.resolution_class
channels = {}
for pol in manifest.polarisations:
_text = '-'.join([manifest.mission_id, manifest.instrument_mode, manifest.product_type, pol])
_name = '-'.join([manifest.instrument_mode, resolution, pol])
for fn in manifest.files:
if os.path.basename(fn).startswith(_text):
channels[_name] = fn
manifest.channels = channels
manifest.pixel_spacing = PIXEL_SPACING[manifest.instrument_mode + '-' + resolution]
except AttributeError:
pass
return manifest
def read_metadata(xmlbuffer):
# Speciel decoders
def dec_isoformat(rts):
return datetime.strptime(rts, "%Y-%m-%dT%H:%M:%S.%fZ")
def dec_orbit_number(rts):
return int(rts[:5])
def dec_satellite_name(rts):
return rts.replace('-', '')
def dec_calibration_unit(rts):
_trans = {'radar brightness': 'nrcs'}
rts = rts.replace(' ', '-').lower()
return rts
attributes = {
'product_level': ('generalHeader/itemName', str),
'satellite_name':
('productInfo/missionInfo/mission', dec_satellite_name),
'orbit_number': ('productInfo/missionInfo/absOrbit', dec_orbit_number),
'sensor_type': ('productInfo/acquisitionInfo/sensor', str),
'beam_mode': ('productInfo/acquisitionInfo/imagingMode', str),
'polarisation':
('productInfo/acquisitionInfo/polarisationList/polLayer', str),
'beamid':
('productInfo/acquisitionInfo/elevationBeamConfiguration', str),
'calibrated': ('productInfo/productVariantInfo/radiometricCorrection',
str),
'calibration_factor': ('calibration/calibrationConstant/calFactor',
float),
'calibration_beamid': ('calibration/calibrationConstant/beamID', str),
'calibration_unit': ('productInfo/imageDataInfo/pixelValueID',
dec_calibration_unit),
'image_data_path': ('productComponents/imageData/file/location/path',
str),
'image_data_filename':
('productComponents/imageData/file/location/filename', str),
'time_start': ('productInfo/sceneInfo/start/timeUTC', dec_isoformat),
'center_coor_lat': ('productInfo/sceneInfo/sceneCenterCoord/lat',
float),
'center_coor_lon': ('productInfo/sceneInfo/sceneCenterCoord/lon',
float)
}
check_attributes = {
'product_level': 'level 1b product',
'satellite_name': 'tsx',
'sensor_type': 'sar'
}
tree = etree.fromstring(xmlbuffer)
# Check satellite, sensor and product level
for key, val in check_attributes.items():
try:
path = attributes[key][0]
attr = tree.xpath(path)[0].text.lower()
if not attr.startswith(val):
raise mipp.ReaderError(
"This does not look like a TSX SAR " +
"Level 1B Product, %s is '%s' expected '%s'" %
(key, attr, val))
except IndexError:
raise mipp.ReaderError(
"This does not look like a TSX SAR " +
"Level 1B Product, could not find attribute '%s' (%s)" %
(key, path))
mda = Metadata()
for key, val in attributes.items():
setattr(mda, key, val[1](tree.xpath(val[0])[0].text))
mda.image_filename = (mda.image_data_path + '/' + mda.image_data_filename)
delattr(mda, 'image_data_path')
delattr(mda, 'image_data_filename')
return mda
def read_metadata(xmlbuffer):
mda = Metadata()
# Speciel decoders
def dec_timeformat(strn):
strn = strn.split('.')
return (datetime.strptime(strn[0], "%Y-%m-%d %H:%M:%S") +
timedelta(seconds=float('.' + strn[1])))
def dec_orbit_number(strn):
return int(strn[:5])
attributes = (
('_ROOT_/Attribute', {
'Satellite ID': ('satellite_name', str),
'Product Filename': ('image_filename', str),
'Product Type': ('product_type', str),
'Acquisition Station ID': ('facility_id', str),
'Scene Sensing Start UTC': ('time_start', dec_timeformat),
'Scene Sensing Stop UTC': ('time_stop', dec_timeformat),
'Orbit Number': ('orbit_number', dec_orbit_number),
'Sample Format': ('product_format', str),
'Image Scale': ('image_scale', str),
'Image Layers': ('layers', int),
'Bits per Sample': ('bits_per_sample', int),
'Samples per Pixel': ('samples_per_pixel', int),
}),
('MBI/Attribute', {
'Column Spacing': ('sample_spacing', float),
'Line Spacing': ('line_spacing', float)
}),
('S01/Attribute', {
'Polarisation': ('polarisation', str),
}),
)
tree = etree.fromstring(xmlbuffer)
#
# Get Atrributes
#
for path, attr in attributes:
names = attr.keys()
path = tree.xpath(path)
for i in path:
name = i.attrib['Name']
if name in names:
names.remove(name)
val = i.text
setattr(mda, attr[name][0], attr[name][1](val))
satid = 'CSK'
if not mda.satellite_name.upper().startswith(satid):
raise mipp.ReaderError(
"This does not look like a CosmoSkymed product, " +
"satellite ID does now start with '%s'"%satid)
mda.image_filename = os.path.splitext(mda.image_filename)[0] + '.MBI.tif'
mda.no_data_value = 0
mda.calibrated = 'NOTCALIBRATED'
return mda
def read_metadata(xmlbuffer):
mda = Metadata()
# Speciel decoders
def dec_timeformat(strn):
strn = strn.split('.')
return (datetime.strptime(strn[0], "%Y-%m-%d %H:%M:%S") +
timedelta(seconds=float('.' + strn[1])))
def dec_orbit_number(strn):
return int(strn[:5])
attributes = (
('_ROOT_/Attribute', {
'Satellite ID': ('satellite_name', str),
'Product Filename': ('image_filename', str),
'Product Type': ('product_type', str),
'Acquisition Station ID': ('facility_id', str),
'Scene Sensing Start UTC': ('time_start', dec_timeformat),
'Scene Sensing Stop UTC': ('time_stop', dec_timeformat),
'Orbit Number': ('orbit_number', dec_orbit_number),
'Sample Format': ('product_format', str),
'Image Scale': ('image_scale', str),
'Image Layers': ('layers', int),
'Bits per Sample': ('bits_per_sample', int),
'Samples per Pixel': ('samples_per_pixel', int),
}),
('MBI/Attribute', {
'Column Spacing': ('sample_spacing', float),
'Line Spacing': ('line_spacing', float)
}),
('S01/Attribute', {
'Polarisation': ('polarisation', str),
}),
)
tree = etree.fromstring(xmlbuffer)
#
# Get Atrributes
#
for path, attr in attributes:
names = attr.keys()
path = tree.xpath(path)
for i in path:
name = i.attrib['Name']
if name in names:
names.remove(name)
val = i.text
setattr(mda, attr[name][0], attr[name][1](val))
satid = 'CSK'
if not mda.satellite_name.upper().startswith(satid):
raise mipp.ReaderError(
"This does not look like a CosmoSkymed product, " +
"satellite ID does now start with '%s'" % satid)
mda.image_filename = os.path.splitext(mda.image_filename)[0] + '.MBI.tif'
mda.no_data_value = 0
mda.calibrated = 'NOTCALIBRATED'
return mda
def read_manifest(filename, **mdax):
"""Read a Sentinel-1 manifest file, and extract selected parameters.
:Parameters:
filename : str
Path to manifest file.
:Returns:
manifest : Metadata object
Selected paramters
"""
def parse_orbit(elm):
if elm.get('type').lower() == 'start':
return int(elm.text)
def parse_text(elm):
return elm.text
def parse_tolower(elm):
return elm.text.lower()
def parse_satellite(elm):
if elm.text.lower().startswith('sen'):
return elm.text.lower()
def parse_time(elm):
return datetime.strptime(elm.text, "%Y-%m-%dT%H:%M:%S.%f")
def parse_coordinates(elm):
cor = elm.text.split()
arr = []
for c in cor:
y, x = [float(i) for i in c.split(',')]
arr.append((x, y))
return arr
def parse_files(elm):
fname = elm.get('href')
if fname and fname.startswith('./measurement/'):
return os.path.join(basedir, fname[2:])
named_decoder = {
'{http://www.esa.int/safe/sentinel-1.0}startTime': ('start_time', 1,
parse_time),
'{http://www.esa.int/safe/sentinel-1.0}stopTime': ('stop_time', 1,
parse_time),
'{http://www.opengis.net/gml}coordinates': ('coordinates', 1,
parse_coordinates),
'{http://www.esa.int/safe/sentinel-1.0}orbitNumber': ('orbit_number',
1, parse_orbit),
'{http://www.esa.int/safe/sentinel-1.0/sentinel-1/sar/level-1}mode':
('instrument_mode', 1, parse_tolower),
'{http://www.esa.int/safe/sentinel-1.0}familyName':
('satellite', 1, parse_satellite), # dublicated !
'{http://www.esa.int/safe/sentinel-1.0/sentinel-1}pass':
('pass', 1, parse_tolower),
'{http://www.esa.int/safe/sentinel-1.0/sentinel-1/sar/level-1}transmitterReceiverPolarisation':
('polarisations', 2, parse_tolower),
'{http://www.esa.int/safe/sentinel-1.0/sentinel-1/sar/level-1}productClassDescription':
('description', 1, parse_text),
'{http://www.esa.int/safe/sentinel-1.0/sentinel-1/sar/level-1}productType':
('product_type', 1, parse_tolower),
'fileLocation': ('files', 2, parse_files),
}
tags = named_decoder.keys()
manifest = Metadata()
basedir = os.path.dirname(filename)
with open(filename) as fp:
xml = etree.parse(fp)
for e in xml.getroot().iter():
if e.tag in tags:
name, count, decoder = named_decoder[e.tag]
value = decoder(e)
if value:
if count > 1:
try:
getattr(manifest, name).append(value)
except AttributeError:
setattr(manifest, name, [value])
else:
setattr(manifest, name, value)
# Add extra metadata
for key, val in mdax.items():
if not hasattr(manifest, key):
setattr(manifest, key, val)
try:
resolution = manifest.resolution_class
channels = {}
for pol in manifest.polarisations:
_text = '-'.join([
manifest.mission_id, manifest.instrument_mode,
manifest.product_type, pol
])
_name = '-'.join([manifest.instrument_mode, resolution, pol])
for fn in manifest.files:
if os.path.basename(fn).startswith(_text):
channels[_name] = fn
manifest.channels = channels
manifest.pixel_spacing = PIXEL_SPACING[manifest.instrument_mode + '-' +
resolution]
except AttributeError:
pass
return manifest
def read_metadata(xml_file):
metadata = Metadata()
# XML Namespace
ns_rs2 = {'xsi': 'http://www.rsi.ca/rs2/prod/xml/schemas'}
# Speciel decoders
def dec_isoformat(rts):
return datetime.strptime(rts, "%Y-%m-%dT%H:%M:%S.%fZ")
def dec_orbit_number(rts):
return int(rts[:5])
attributes = {
'product_id': ('xsi:productId', str),
'satellite_name': ('xsi:sourceAttributes/xsi:satellite', str),
'sensor_name': ('xsi:sourceAttributes/xsi:sensor', str),
'beam_mode': ('xsi:sourceAttributes/xsi:beamModeMnemonic', str),
'facility_id': ('xsi:sourceAttributes/xsi:inputDatasetFacilityId',
str),
'start_time': ('xsi:sourceAttributes/xsi:rawDataStartTime',
dec_isoformat),
'orbit_number':
('xsi:sourceAttributes/xsi:orbitAndAttitude/xsi:orbitInformation/xsi:orbitDataFile',
dec_orbit_number),
'product_format': ('xsi:imageAttributes/xsi:productFormat', str),
'bits_per_sample':
('xsi:imageAttributes/xsi:rasterAttributes/xsi:bitsPerSample', int),
'samples':
('xsi:imageAttributes/xsi:rasterAttributes/xsi:numberOfSamplesPerLine',
int),
'lines': ('xsi:imageAttributes/xsi:rasterAttributes/xsi:numberOfLines',
int),
'sample_spacing':
('xsi:imageAttributes/xsi:rasterAttributes/xsi:sampledPixelSpacing',
float),
'line_spacing':
('xsi:imageAttributes/xsi:rasterAttributes/xsi:sampledLineSpacing',
float),
'data_files': ('xsi:imageAttributes/xsi:fullResolutionImageData', str),
'center_lat': ('centre_lat', str),
'center_lon': ('centre_lon', str),
'tie_point_lines': ('tie_point_lines', str),
'tie_point_samples': ('tie_point_samples', str),
'tie_point_line_jump': ('tie_point_line_jump', str),
'tie_point_sample_jump': ('tie_point_sample_jump', str)
}
tree = etree.parse(xml_file)
# Get some attributes
for key, (att, dec) in attributes.items():
if att.startswith('xsi'):
rec = tree.xpath(att, namespaces=ns_rs2)
if len(rec) > 1:
val = tuple([dec(i.text) for i in rec])
else:
val = dec(rec[0].text)
setattr(metadata, key, val)
#
# Get tiepoints
#
tiepoints_xpath = 'xsi:imageAttributes/xsi:geographicInformation/xsi:geolocationGrid/xsi:imageTiePoint'
tiepoints_tree = tree.xpath(tiepoints_xpath, namespaces=ns_rs2)
tiepoints_count = len(tiepoints_tree)
pix_coordinates = numpy.zeros((tiepoints_count, 2))
geo_coordinates = numpy.zeros((tiepoints_count, 2))
counter = 0
for elm in tiepoints_tree:
if elm.tag.endswith('imageTiePoint'):
pixel, line, lat, lon = None, None, None, None
for i in elm.iter():
if i.getparent().tag.endswith('imageCoordinate'):
if i.tag.endswith('pixel'):
pixel = float(i.text)
elif i.tag.endswith('line'):
line = float(i.text)
elif i.getparent().tag.endswith('geodeticCoordinate'):
if i.tag.endswith('latitude'):
lat = float(i.text)
elif i.tag.endswith('longitude'):
lon = float(i.text)
if None not in (pixel, line, lat, lon):
pix_coordinates[counter] = [line, pixel]
geo_coordinates[counter] = [lat, lon]
counter += 1
if counter > 0:
setattr(metadata, 'tiepoints',
TiePoints(pix_coordinates, geo_coordinates))
return metadata
