Fix distances set to 0 in TCX using https://www.plotaroute.com

tcx_fixer.py

from xml.dom import minidom
import xml.etree.ElementTree as ET
import math
import decimal

# send the original TCX file to https://www.plotaroute.com/ and export it to get the right distances
fixed_doc = minidom.parse('fromplotaroute.tcx')

distances = []
for fixedElem in fixed_doc.getElementsByTagName('Trackpoint'):
    pos = fixedElem.getElementsByTagName('Position')
    latitude = pos[0].getElementsByTagName('LatitudeDegrees')[0].firstChild.data
    longitude = pos[0].getElementsByTagName('LongitudeDegrees')[0].firstChild.data
    distance = fixedElem.getElementsByTagName('DistanceMeters')[0].firstChild.data
    elem = {
        'lat': latitude,
        'long': longitude,
        'dist': distance
    }
    distances.append(elem)

# this is the original file created by Fitbit
original_doc = minidom.parse('fitbit.tcx')
i = 0
for elem in original_doc.getElementsByTagName('Trackpoint'):

    if (i >= len(distances)):
        elem.getElementsByTagName('DistanceMeters')[0].firstChild.data = 0
        continue
    pos = elem.getElementsByTagName('Position')
    latitude = pos[0].getElementsByTagName('LatitudeDegrees')[0].firstChild.data
    longitude = pos[0].getElementsByTagName('LongitudeDegrees')[0].firstChild.data

    curr_distance = distances[i]

    a = decimal.Decimal(curr_distance['lat'])
    decimal_places_a = a.as_tuple().exponent
    relative_tolerance_a = 10 ** decimal_places_a
    b = decimal.Decimal(curr_distance['long'])
    decimal_places_b = b.as_tuple().exponent
    relative_tolerance_b = 10 ** decimal_places_b
    
    if (math.isclose(a,float(latitude),rel_tol=relative_tolerance_a) and math.isclose(b, float(longitude),rel_tol=relative_tolerance_b)):
        elem.getElementsByTagName('DistanceMeters')[0].firstChild.data = curr_distance['dist']
        i += 1
    else:
        elem.getElementsByTagName('DistanceMeters')[0].firstChild.data = 0

# write results
with open("fixed.tcx", "w") as xml_file:
    original_doc.writexml(xml_file)