Measuring the distance

In order to understand the elevation data chart, we need reference points along the x axis to help us determine the elevation along the route. We will calculate the mile splits along the route and place these at the appropriate location on the x axis of our charts:

# Locate the mile markers
for i in range(1, int(round(total))):
    mile = 0
    while mile < i:
        j += 1
        mile += distances[j]
    measurements.append((int(mile), j))
    j =- 1

# Set up labels for the mile points

positions = []
miles = []
for m, i in measurements:
    pos = ((i*1.0)/len(elvs)) * 100
    positions.append(pos)
    miles.append(m)

# Position the mile marker labels along the x axis
miles_label = chart.set_axis_labels(Axis.BOTTOM, miles)
chart.set_axis_positions(miles_label, positions)

# Label the x axis as "Miles"
miles_text = chart.set_axis_labels(Axis.BOTTOM, ["MILES", ])
chart.set_axis_positions(miles_text, [50, ])

# Save the chart
chart.download...