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test_trajectory_stop_detector.py
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test_trajectory_stop_detector.py
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# -*- coding: utf-8 -*-
from datetime import datetime, timedelta
from fiona.crs import from_epsg
from numpy import issubdtype
from movingpandas.trajectory_collection import TrajectoryCollection
from movingpandas.trajectory_splitter import StopSplitter
from movingpandas.trajectory_stop_detector import TrajectoryStopDetector
from .test_trajectory import Node, make_traj
CRS_METRIC = from_epsg(31256)
CRS_LATLON = from_epsg(4326)
class TestTrajectorySplitter:
def setup_method(self):
self.traj = make_traj(
[
Node(0, 0),
Node(0, 10, second=1),
Node(0, 20, second=2),
Node(0, 21, second=4),
Node(0, 22, second=6),
Node(0, 30, second=8),
Node(0, 40, second=10),
Node(1, 50, second=15),
]
)
self.detector = TrajectoryStopDetector(self.traj)
def test_stop_segments_middle_stop(self):
stop_segments = self.detector.get_stop_segments(
max_diameter=3, min_duration=timedelta(seconds=2)
)
assert len(stop_segments) == 1
assert (
stop_segments.trajectories[0].to_linestringm_wkt()
== "LINESTRING M (0.0 20.0 2.0, 0.0 21.0 4.0, 0.0 22.0 6.0)"
)
def test_stop_times_middle_stop(self):
stop_times = self.detector.get_stop_time_ranges(
max_diameter=3, min_duration=timedelta(seconds=2)
)
assert len(stop_times) == 1
assert stop_times[0].t_0 == datetime(1970, 1, 1, 0, 0, 2)
assert stop_times[0].t_n == datetime(1970, 1, 1, 0, 0, 6)
def test_stop_points_middle_stop(self):
self.traj.id = "a"
stop_points = self.detector.get_stop_points(
max_diameter=3, min_duration=timedelta(seconds=2)
)
assert len(stop_points) == 1
assert stop_points.iloc[0].geometry.x == 0
assert stop_points.iloc[0].geometry.y == 21
assert stop_points.iloc[0].start_time == datetime(1970, 1, 1, 0, 0, 2)
assert stop_points.iloc[0].end_time == datetime(1970, 1, 1, 0, 0, 6)
assert stop_points.iloc[0].duration_s == 4
assert stop_points.iloc[0].traj_id == "a"
def test_stop_point_parent_traj_id(self):
stop_points = self.detector.get_stop_points(
max_diameter=3, min_duration=timedelta(seconds=2)
)
assert stop_points.iloc[0].traj_id == 1
assert issubdtype(stop_points.iloc[0].traj_id, type(self.traj.id))
self.traj.id = "a"
stop_points = self.detector.get_stop_points(
max_diameter=3, min_duration=timedelta(seconds=2)
)
assert stop_points.iloc[0].traj_id == "a"
assert isinstance(stop_points.iloc[0].traj_id, type(self.traj.id))
self.traj.id = 5.5
stop_points = self.detector.get_stop_points(
max_diameter=3, min_duration=timedelta(seconds=2)
)
assert stop_points.iloc[0].traj_id == 5.5
assert issubdtype(stop_points.iloc[0].traj_id, type(self.traj.id))
def test_stop_detector_start_stop(self):
traj = make_traj(
[
Node(0, 0),
Node(0, 1, second=1),
Node(0, 2, second=2),
Node(0, 1, second=3),
Node(0, 22, second=4),
Node(0, 30, second=8),
Node(0, 40, second=10),
Node(1, 50, second=15),
]
)
detector = TrajectoryStopDetector(traj)
stop_times = detector.get_stop_time_ranges(
max_diameter=3, min_duration=timedelta(seconds=2)
)
assert len(stop_times) == 1
assert stop_times[0].t_0 == datetime(1970, 1, 1, 0, 0, 0)
assert stop_times[0].t_n == datetime(1970, 1, 1, 0, 0, 3)
def test_stop_detector_end_stop(self):
traj = make_traj(
[
Node(0, -100),
Node(0, -10, second=1),
Node(0, 2, second=2),
Node(0, 1, second=3),
Node(0, 22, second=4),
Node(0, 30, second=8),
Node(0, 31, second=10),
Node(1, 32, second=15),
]
)
detector = TrajectoryStopDetector(traj)
stop_times = detector.get_stop_time_ranges(
max_diameter=3, min_duration=timedelta(seconds=2)
)
assert len(stop_times) == 1
assert stop_times[0].t_0 == datetime(1970, 1, 1, 0, 0, 8)
assert stop_times[0].t_n == datetime(1970, 1, 1, 0, 0, 15)
def test_stop_detector_multiple_stops(self):
traj = make_traj(
[
Node(0, 0),
Node(0, 1, second=1),
Node(0, 2, second=2),
Node(0, 1, second=3),
Node(0, 22, second=4),
Node(0, 30, second=8),
Node(0, 31, second=10),
Node(1, 32, second=15),
]
)
detector = TrajectoryStopDetector(traj)
stop_times = detector.get_stop_time_ranges(
max_diameter=3, min_duration=timedelta(seconds=2)
)
assert len(stop_times) == 2
assert stop_times[0].t_0 == datetime(1970, 1, 1, 0, 0, 0)
assert stop_times[0].t_n == datetime(1970, 1, 1, 0, 0, 3)
assert stop_times[1].t_0 == datetime(1970, 1, 1, 0, 0, 8)
assert stop_times[1].t_n == datetime(1970, 1, 1, 0, 0, 15)
def test_stop_detector_no_stops(self):
traj = make_traj(
[
Node(0, 0),
Node(0, 1, second=1),
Node(0, 2, second=2),
Node(0, 1, second=3),
Node(0, 22, second=4),
Node(0, 30, second=8),
Node(0, 31, second=10),
Node(1, 32, second=15),
]
)
detector = TrajectoryStopDetector(traj)
stop_times = detector.get_stop_time_ranges(
max_diameter=1, min_duration=timedelta(seconds=1)
)
stop_segments = detector.get_stop_segments(
max_diameter=1, min_duration=timedelta(seconds=1)
)
stop_points = detector.get_stop_points(
max_diameter=1, min_duration=timedelta(seconds=1)
)
assert len(stop_times) == 0
assert len(stop_segments) == 0
assert len(stop_points) == 0
def test_stop_detector_collection(self):
traj1 = make_traj(
[
Node(0, 0),
Node(0, 1, second=1),
Node(0, 2, second=2),
Node(0, 1, second=3),
Node(0, 22, second=4),
Node(0, 30, second=8),
Node(0, 40, second=10),
Node(1, 50, second=15),
],
id=1,
)
traj2 = make_traj(
[
Node(0, -100),
Node(0, -10, second=1),
Node(0, 2, second=2),
Node(0, 1, second=3),
Node(0, 22, second=4),
Node(0, 30, second=8),
Node(0, 31, second=10),
Node(1, 32, second=15),
],
id=2,
)
collection = TrajectoryCollection([traj1, traj2])
detector = TrajectoryStopDetector(collection)
stop_times = detector.get_stop_time_ranges(
max_diameter=3, min_duration=timedelta(seconds=2)
)
stop_segments = detector.get_stop_segments(
max_diameter=3, min_duration=timedelta(seconds=2)
)
stop_points = detector.get_stop_points(
max_diameter=3, min_duration=timedelta(seconds=2)
)
assert len(stop_times) == 2
assert len(stop_segments) == 2
assert len(stop_points) == 2
def test_stop_splitter_no_stops(self):
traj1 = make_traj(
[
Node(0, 0),
Node(0, 10, second=10),
Node(0, 20, second=20),
Node(0, 30, second=30),
Node(0, 40, second=40),
Node(0, 50, second=50),
],
id=1,
)
collection = TrajectoryCollection([traj1])
detector = StopSplitter(collection)
stops = detector.split(max_diameter=1, min_duration=timedelta(seconds=1))
assert len(stops) == 1