def _gps_item(self, data=None) -> Optional[GPS]:
if data is not None:
tags_data = data
else:
tags_data = self._all_tags()
gps = GPS()
# required gps timestamp or exif timestamp
gps.timestamp = gps_timestamp(tags_data)
exif_timestamp = timestamp(tags_data)
if (not gps.timestamp or
(exif_timestamp is not None and exif_timestamp > 31556952
and abs(gps.timestamp - exif_timestamp) > 31556952)):
# if there is no gps timestamp or gps timestamp differs with more then 1 year compared to exif_timestamp we
# choose exif_timestamp
gps.timestamp = exif_timestamp
# required latitude and longitude
gps.latitude = gps_latitude(tags_data)
gps.longitude = gps_longitude(tags_data)
if not gps.latitude or \
not gps.longitude or \
not gps.timestamp:
return None
# optional data
gps.speed = gps_speed(tags_data)
gps.altitude = gps_altitude(tags_data)
return gps
def waylens_device(gps: GPS):
"""this function fixes an error for waylens metadata when gps speed is logged in m/s"""
timestamp_error(gps)
if "waylens" in device_item.device_raw_name:
gps.speed = str(float(gps.speed) / 3.6)
gps.latitude = float(gps.latitude)
gps.longitude = float(gps.longitude)
gps.horizontal_accuracy = float(gps.horizontal_accuracy)
if gps.altitude is not None:
gps.altitude = float(gps.altitude)
if gps.vertical_accuracy is not None:
gps.vertical_accuracy = float(gps.vertical_accuracy)
if gps.speed is not None:
gps.speed = float(gps.speed)
def items(self) -> List[SensorItem]:
with open(self.file_path, 'r') as gpx_file:
gpx = gpxpy.parse(gpx_file)
sensors: List[SensorItem] = []
for track in gpx.tracks:
for segment in track.segments:
for point in segment.points:
gps = GPS()
gps.speed = point.speed
gps.timestamp = point.time.timestamp()
gps.latitude = point.latitude
gps.longitude = point.longitude
gps.altitude = point.elevation
sensors.append(gps)
return sensors
def next_item(self) -> Optional[SensorItem]:
with open(self.file_path, 'r') as gpx_file:
gpx = gpxpy.parse(gpx_file)
index = 0
for track in gpx.tracks:
for segment in track.segments:
for point in segment.points:
if index == self._data_pointer:
gps = GPS()
gps.speed = point.speed
gps.timestamp = point.time.timestamp()
gps.latitude = point.latitude
gps.longitude = point.longitude
gps.altitude = point.elevation
self._data_pointer += 1
return gps
return None
def items(self) -> List[SensorItem]:
with self._storage.open(self.file_path, 'r') as geo_json_file:
geo_json = load(geo_json_file)
index = 0
sensors: List[SensorItem] = []
for feature in geo_json["features"]:
geometry = feature["geometry"]
coordinates = geometry["coordinates"]
for geometry_coordinate in coordinates:
if isinstance(geometry_coordinate,
float) and len(coordinates) == 2:
# this is a point
gps = GPS()
gps.timestamp = time.time() + index
gps.latitude = coordinates[1]
gps.longitude = coordinates[0]
sensors.append(gps)
break
elif isinstance(geometry_coordinate[0],
float) and len(geometry_coordinate) == 2:
# this is a list of points
longitude = geometry_coordinate[0]
latitude = geometry_coordinate[1]
gps = GPS()
gps.timestamp = time.time() + index
gps.latitude = latitude
gps.longitude = longitude
sensors.append(gps)
index += 1
else:
# this is a list of list of points
for geometry_point_coordinate in geometry_coordinate[
0]:
longitude = geometry_point_coordinate[0]
latitude = geometry_point_coordinate[1]
gps = GPS()
gps.timestamp = time.time() + index
gps.latitude = latitude
gps.longitude = longitude
sensors.append(gps)
index += 1
return sensors