def get_geotag_properties_from_exif(image, offset_angle=0.0, verbose=False):
try:
exif = ExifRead(image)
except:
print(
"Error, EXIF could not be read for image " + image +
", geotagging process failed for this image since gps/time properties not read."
)
return None
# required tags
try:
lon, lat = exif.extract_lon_lat()
except:
print(
"Error, " + image +
" image latitude or longitude tag not in EXIF. Geotagging process failed for this image, since this is required information."
)
return None
if lat != None and lon != None:
geotag_properties = {"MAPLatitude": lat}
geotag_properties["MAPLongitude"] = lon
else:
print(
"Error, " + image +
" image latitude or longitude tag not in EXIF. Geotagging process failed for this image, since this is required information."
)
return None
try:
timestamp = exif.extract_capture_time()
except:
print(
"Error, " + image +
" image capture time tag not in EXIF. Geotagging process failed for this image, since this is required information."
)
return None
geotag_properties["MAPCaptureTime"] = datetime.datetime.strftime(
timestamp, "%Y_%m_%d_%H_%M_%S_%f")[:-3]
# optional fields
try:
geotag_properties["MAPAltitude"] = exif.extract_altitude()
except:
if verbose:
print("Warning, image altitude tag not in EXIF.")
try:
heading = exif.extract_direction()
if heading is None:
heading = 0.0
heading = normalize_bearing(heading + offset_angle)
# bearing of the image
geotag_properties["MAPCompassHeading"] = {
"TrueHeading": heading,
"MagneticHeading": heading
}
except:
if verbose:
print("Warning, image direction tag not in EXIF.")
return geotag_properties
def get_geotag_properties_from_exif(image, offset_angle=0.0, verbose=False):
try:
exif = ExifRead(image)
except:
print_error("Error, EXIF could not be read for image " +
image + ", geotagging process failed for this image since gps/time properties not read.")
return None
# required tags
try:
lon, lat = exif.extract_lon_lat()
except:
print_error("Error, " + image +
" image latitude or longitude tag not in EXIF. Geotagging process failed for this image, since this is required information.")
return None
if lat != None and lon != None:
geotag_properties = {"MAPLatitude": lat}
geotag_properties["MAPLongitude"] = lon
else:
print_error("Error, " + image +
" image latitude or longitude tag not in EXIF. Geotagging process failed for this image, since this is required information.")
return None
try:
timestamp = exif.extract_capture_time()
except:
print_error("Error, " + image +
" image capture time tag not in EXIF. Geotagging process failed for this image, since this is required information.")
return None
try:
geotag_properties["MAPCaptureTime"] = datetime.datetime.strftime(
timestamp, "%Y_%m_%d_%H_%M_%S_%f")[:-3]
except:
print_error("Error, {} image capture time tag incorrect format. Geotagging process failed for this image, since this is required information.".format(image))
return None
# optional fields
try:
geotag_properties["MAPAltitude"] = exif.extract_altitude()
except:
if verbose:
print("Warning, image altitude tag not in EXIF.")
try:
heading = exif.extract_direction()
if heading is None:
heading = 0.0
heading = normalize_bearing(heading + offset_angle)
# bearing of the image
geotag_properties["MAPCompassHeading"] = {"TrueHeading": heading,
"MagneticHeading": heading}
except:
if verbose:
print("Warning, image direction tag not in EXIF.")
return geotag_properties
def extract_direction(self):
'''
Extract image direction (i.e. compass, heading, bearing)
'''
fields = ['GPS GPSImgDirection',
'EXIF GPS GPSImgDirection',
'GPS GPSTrack',
'EXIF GPS GPSTrack']
direction, _ = self._extract_alternative_fields(fields)
if direction is not None:
direction = normalize_bearing(direction, check_hex=True)
return direction
def extract_direction(self):
'''
Extract image direction (i.e. compass, heading, bearing)
'''
fields = ['GPS GPSImgDirection',
'EXIF GPS GPSImgDirection',
'GPS GPSTrack',
'EXIF GPS GPSTrack']
direction, _ = self._extract_alternative_fields(fields)
if direction is not None:
direction = normalize_bearing(direction, check_hex=True)
return direction