Introduction You are jogging and want to show off your route to your friends. Let’s imagine the data you have for your route is a CSV file in the following format: Listing 1: track.csv time,lat,lng,height 2015-08-20 03:48:07.235,32.519585,35.015021,136.1999969482422 2015-08-20 03:48:24.734,32.519606,35.014954,126.5999984741211 2015-08-20 03:48:25.660,32.519612,35.014871,123.0 2015-08-20 03:48:26.819,32.519654,35.014824,120.5 2015-08-20 03:48:27.828,32.519689,35.014776,118.9000015258789 2015-08-20 03:48:29.720,32.519691,35.014704,119.9000015258789 2015-08-20 03:48:30.669,32.519734,35.014657,120.9000015258789 Listing 1 shows the first few lines of track.csv. Each line contains a time stamp in UTC, latitude, longitude and height above sea level in meters.