📈Haversine Distance

Compute haversine distance in meters between track positions for a given track

import numpy as np
import aisdb
y1, x1 = -66.84683, 44.96421
y2, x2 = -66.83036, 44.9679
y3, x3 = -66.81388, 44.9716

# creating a sample track
tracks_short = [
   dict(
            lon=np.array([x1,x2,x3]),
            lat=np.array([y1,y2,y3]),
            time=[0,1,2],
            dynamic=set(['time']),
        )
]
trk_1 = tracks_short[0]
rt_ = aisdb.gis.delta_meters(trk_1)