Inserts the interpolated signals and derivatives in the database

insert_dead_reckon.py

def insert_dead_reckon(locations: List[DeadReckon]) -> None:
    db = get_eved_db()

    lat = np.array([p.latitude for p in locations])
    lon = np.array([p.longitude for p in locations])
    t = [p.t for p in locations]
    signal_ids = [p.signal_id for p in locations]

    x = np.append([0.0], 
                  vec_haversine(lat[:-1], lon[:-1], 
                                lat[1:], lon[1:])).cumsum()

    speed = np.gradient(x, t)
    accel = np.gradient(speed, t)
    jerk = np.gradient(accel, t)
    db.save_dead_reckoning(signal_ids, t, lat, lon, x, speed, accel, jerk)