def segment_driver(driver_id):
''' this generated the segments in settings.SEGMENTS_FOLDER[1] '''
da = DataAccess()
for ride_id_minus_1, ride in enumerate(da.get_rides(driver_id)):
ride_id = ride_id_minus_1 + 1
if da.skip_segment(driver_id, ride_id):
continue
# apply the Ramer-Douglas-Peucker algorithm
ride = [p + [i]
for i, p in enumerate(smoothen(ride))] # enrich with timestamp
ride = rdp(ride, epsilon=10)
lengths = [
util.euclidian_distance(ride[i - 1], ride[i])
for i in xrange(1, len(ride))
]
times = [ride[i][2] - ride[i - 1][2] for i in xrange(1, len(ride))]
angles = [
util.get_angle(ride[i - 2], ride[i - 1], ride[i])
for i in xrange(2, len(ride))
]
# bucket the values
lengths = util.bucket(np.log(lengths), 25,
[2.2, 8]) # [int(l) for l in lengths]
times = util.bucket(np.log(times), 20,
[1, 5.5]) # [int(t) for t in times]
angles = util.bucket(angles, 30, [0, 180]) # [int(a) for a in angles]
# write results
da.write_ride_segments(driver_id, ride_id, lengths, times, angles)
logging.info('finished segmenting driver %s' % driver_id)
def segment_driver(driver_id):
''' this generated the segments in settings.SEGMENTS_FOLDER[1] '''
da = DataAccess()
for ride_id_minus_1, ride in enumerate(da.get_rides(driver_id)):
ride_id = ride_id_minus_1 + 1
if da.skip_segment(driver_id, ride_id):
continue
# apply the Ramer-Douglas-Peucker algorithm
ride = [p + [i] for i, p in enumerate(smoothen(ride))] # enrich with timestamp
ride = rdp(ride, epsilon=10)
lengths = [util.euclidian_distance(ride[i-1], ride[i]) for i in xrange(1, len(ride))]
times = [ride[i][2] - ride[i-1][2] for i in xrange(1, len(ride))]
angles = [util.get_angle(ride[i-2], ride[i-1], ride[i]) for i in xrange(2, len(ride))]
# bucket the values
lengths = util.bucket(np.log(lengths), 25, [2.2,8]) # [int(l) for l in lengths]
times = util.bucket(np.log(times), 20, [1,5.5]) # [int(t) for t in times]
angles = util.bucket(angles, 30, [0,180]) # [int(a) for a in angles]
# write results
da.write_ride_segments(driver_id, ride_id, lengths, times, angles)
logging.info('finished segmenting driver %s' % driver_id)
def segment_driver_v2(driver_id):
''' this generated the segments in settings.SEGMENTS_FOLDER[2] '''
da = DataAccess()
for ride_id_minus_1, ride in enumerate(da.get_rides(driver_id)):
ride_id = ride_id_minus_1 + 1
if da.skip_segment(driver_id, ride_id, version=2):
continue
# apply the Ramer-Douglas-Peucker algorithm
ride = [p + [i] for i, p in enumerate(ride)] # enrich with timestamp
ride = rdp(ride, epsilon=4)
lengths = [
util.euclidian_distance(ride[i - 1], ride[i])
for i in range(1, len(ride))
]
times = [ride[i][2] - ride[i - 1][2] for i in range(1, len(ride))]
angles = [
util.get_angle(ride[i - 2], ride[i - 1], ride[i])
for i in range(2, len(ride))
]
lengths = np.histogram(lengths,
bins=list(range(0, 700, 20)) + [1000000000])[0]
times = np.histogram(times,
bins=list(range(0, 60, 4)) + [1000000000])[0]
angles = np.histogram(angles, bins=list(range(0, 181, 20)))[0]
# write results
da.write_ride_segments(driver_id,
ride_id,
lengths,
times,
angles,
version=2)
logging.info('finished segmenting driver %s' % driver_id)
def segment_driver_v2(driver_id):
''' this generated the segments in settings.SEGMENTS_FOLDER[2] '''
da = DataAccess()
for ride_id_minus_1, ride in enumerate(da.get_rides(driver_id)):
ride_id = ride_id_minus_1 + 1
if da.skip_segment(driver_id, ride_id, version=2):
continue
# apply the Ramer-Douglas-Peucker algorithm
ride = [p + [i] for i, p in enumerate(ride)] # enrich with timestamp
ride = rdp(ride, epsilon=4)
lengths = [util.euclidian_distance(ride[i-1], ride[i]) for i in xrange(1, len(ride))]
times = [ride[i][2] - ride[i-1][2] for i in xrange(1, len(ride))]
angles = [util.get_angle(ride[i-2], ride[i-1], ride[i]) for i in xrange(2, len(ride))]
lengths = np.histogram(lengths, bins=range(0, 700, 20) + [1000000000])[0]
times = np.histogram(times, bins=range(0, 60, 4) + [1000000000])[0]
angles = np.histogram(angles, bins=range(0, 181, 20))[0]
# write results
da.write_ride_segments(driver_id, ride_id, lengths, times, angles, version=2)
logging.info('finished segmenting driver %s' % driver_id)