iSki GPX Generator

gpx-file-from-iSki.py

import json
import datetime
import sys

'''
Steps to generate GPX file from iSki

This wont be exact in terms of timings as I have fudged the time format as I don't understand it.

Get the data...
1. Log in to iSki
2. Navigate to "Tracks"
3. Pick a track you want to export and click "Share" on it
4. Right click & inspect the HTML of that page
5. Copy out the URL at the bottom which is in a var specs object under "items"
6. Put that URL in a browser and copy or save the contents

Convert the data...
1. Save this script
2. Edit script.  Set the data file name, GPX title, and timestamp date
3. run 'python gpx-file-from-iSki.py <your_data_file_name.json>' 

You should have a new file output.gpx 

'''

path_file_name = sys.argv[1]
output_file_name = "output.gpx"
print(f"Extracting path date from '{path_file_name}'...")

path_file = open(path_file_name, "r")
path_data = json.load(path_file)
gpx_file = open(output_file_name, "w")

gpx_title = "ENTER GPS TITLE"
# The date the GPX data will show as recorded
gpx_record_year = 2013 
gpx_record_month = 3
gpx_record_day = 21

gpx_file.write("<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n")
gpx_file.write("<gpx version=\"1.0\">\n")
gpx_file.write(f"\t<trk>\n\t\t<name>{gpx_title}</name>\n\t\t<number>1</number>\n\t\t<trkseg>\n")

point_count = 0
for entry in path_data['path']:
	#lat, ng, time, elecation
	lat = entry['lat']
	lng = entry['lng']
	elev = entry['elevation']
	#XXX No idea what the time format is, I messed with this number till it looked right
	timestamp = datetime.datetime.utcfromtimestamp(entry['time'] / 1057)
	#XXX No date information in extracted data so I'm just hard coding it in per extraction
	timestamp = timestamp.replace(year=gpx_record_year, month=gpx_record_month, day=gpx_record_day)
	time = timestamp.strftime("%Y-%m-%dT%H:%M:%S%Z")
	gpx_file.write(f"\t\t\t<trkpt lat=\"{lat}\" lon=\"{lng}\"><ele>{elev}</ele><time>{time}</time></trkpt>\n")
	point_count += 1

gpx_file.write("\t\t</trkseg>\n\t</trk>\n")
gpx_file.write("</gpx>")

print(f"...GPX data ({point_count} points) generated to '{output_file_name}'")

path_file.close()
gpx_file.close()