Build a GPX file from a CSV file exported from dashboard.automatic.com.

polylines2gpx.js

"use strict";

var csv = require("ya-csv");
var polyline = require("polyline");
var moment = require("moment-timezone");
var togpx = require("togpx")

var reader = csv.createCsvStreamReader(process.stdin, { columnsFromHeader : true });

var geojson = {
	"type": "FeatureCollection",
	"features": []
};

reader.addListener("data", function(row) {
	var points = polyline.decode(row["Path"]).map(point => [ point[1], point[0] ]);
	var begin = moment.tz(row["Start Time"], "YYYY-MM-DD h:mm A", "America/Los_Angeles").utc().format("YYYY-MM-DDTHH:mm:ss.SSSSZ");
	var times = Array(points.length).fill(begin);
	geojson.features.unshift({
		"type": "Feature",
		"geometry": {
			"type": "LineString",
			"coordinates": points
		},
		"properties": {
			"times": times
		}
	});
});

reader.addListener("end", function(row) {
	//console.log(JSON.stringify(geojson, null, "  "));
	console.log(togpx(geojson));
});