def test_offset_calculations(self):
"""Tests the latitude/longitude to y_m/x_m offset calculations."""
for value in (-2.0, -1.0, 0.0, 1.0, 2.0):
self.assertAlmostEqual(
value,
Telemetry.offset_y_m_to_latitude(
Telemetry.latitude_to_m_offset(value)))
self.assertAlmostEqual(
value,
Telemetry.latitude_to_m_offset(
Telemetry.offset_y_m_to_latitude(value)))
for value_2 in (-0.01, 0.0, 0.01):
self.assertAlmostEqual(
value,
Telemetry.offset_x_m_to_longitude(
Telemetry.longitude_to_m_offset(value, 0.0), value_2))
self.assertAlmostEqual(
value,
Telemetry.offset_x_m_to_longitude(
Telemetry.longitude_to_m_offset(value, 0.0), value_2))
rally_parking_lot = (40.020776, -105.248319)
self.assertAlmostEqual(
Telemetry.offset_x_m_to_longitude(
Telemetry.longitude_to_m_offset(rally_parking_lot[1],
rally_parking_lot[0]),
rally_parking_lot[0]), rally_parking_lot[1])
def _load_waypoints(kml_stream):
"""Loads and returns the waypoints from a KML string."""
def get_child(element, tag_name):
"""Returns the child element with the given tag name."""
try:
return getattr(element, tag_name)
except AttributeError:
raise ValueError('No {tag} element found'.format(tag=tag_name))
root = parser.parse(kml_stream).getroot()
if 'kml' not in root.tag:
raise ValueError('Not a KML file')
document = get_child(root, 'Document')
placemark = get_child(document, 'Placemark')
line_string = get_child(placemark, 'LineString')
# Unlike all of the other tag names, "coordinates" is not capitalized
coordinates = get_child(line_string, 'coordinates')
waypoints = []
text = coordinates.text.strip()
for csv in re.split(r'\s', text):
(
longitude,
latitude,
altitude # pylint: disable=unused-variable
) = csv.split(',')
waypoints.append((
Telemetry.longitude_to_m_offset(float(longitude), float(latitude)),
Telemetry.latitude_to_m_offset(float(latitude))
))
return waypoints
def test_offset_calculations(self):
"""Tests the latitude/longitude to y_m/x_m offset calculations."""
for value in (-2.0, -1.0, 0.0, 1.0, 2.0):
self.assertAlmostEqual(
value,
Telemetry.offset_y_m_to_latitude(
Telemetry.latitude_to_m_offset(value)
)
)
self.assertAlmostEqual(
value,
Telemetry.latitude_to_m_offset(
Telemetry.offset_y_m_to_latitude(
value
)
)
)
for value_2 in (-0.01, 0.0, 0.01):
self.assertAlmostEqual(
value,
Telemetry.offset_x_m_to_longitude(
Telemetry.longitude_to_m_offset(value, 0.0),
value_2
)
)
self.assertAlmostEqual(
value,
Telemetry.offset_x_m_to_longitude(
Telemetry.longitude_to_m_offset(value, 0.0),
value_2
)
)
rally_parking_lot = (40.020776, -105.248319)
self.assertAlmostEqual(
Telemetry.offset_x_m_to_longitude(
Telemetry.longitude_to_m_offset(
rally_parking_lot[1],
rally_parking_lot[0]
),
rally_parking_lot[0]
),
rally_parking_lot[1]
)
def test_load_waypoints(self):
"""Tests loading waypoints from a KML format file."""
coordinates_long_lat = zip(range(10), range(10, 0, -1))
coordinates_str = " ".join(("{},{},50".format(long, lat) for long, lat in coordinates_long_lat))
kml = KML_TEMPLATE.format(coordinates_str).encode("utf-8")
kml_buffer = io.BytesIO(kml)
waypoints = SimpleWaypointGenerator._load_waypoints(kml_buffer)
for m_offset, long_lat in zip(waypoints, coordinates_long_lat):
x_m_1, y_m_1 = m_offset
long_, lat = long_lat
x_m_2 = Telemetry.longitude_to_m_offset(long_)
y_m_2 = Telemetry.latitude_to_m_offset(lat)
self.assertEqual(x_m_1, x_m_2)
self.assertEqual(y_m_1, y_m_2)
def test_load_waypoints(self):
"""Tests loading waypoints from a KML format file."""
coordinates_long_lat = zip(range(10), range(10, 0, -1))
coordinates_str = ' '.join(('{},{},50'.format(long, lat)
for long, lat in coordinates_long_lat))
kml = KML_TEMPLATE.format(coordinates_str).encode('utf-8')
kml_buffer = io.BytesIO(kml)
waypoints = SimpleWaypointGenerator._load_waypoints(kml_buffer)
for m_offset, long_lat in zip(waypoints, coordinates_long_lat):
x_m_1, y_m_1 = m_offset
long_, lat = long_lat
x_m_2 = Telemetry.longitude_to_m_offset(long_)
y_m_2 = Telemetry.latitude_to_m_offset(lat)
self.assertEqual(x_m_1, x_m_2)
self.assertEqual(y_m_1, y_m_2)