This is not a fully featured gpx parser or builder so don't expect it to do everything. The aim is to be simple and practical and do what you need.
import { parseGpx, buildGpx } from 'practical-gpx-to-js';
import * as fs from 'fs';
import * as path from 'path';
let gpxString = fs.readFileSync(path.join(__dirname, 'Track.gpx'), {
encoding: 'utf8',
});
let gpx = parseGpx(gpxString);
let newGpxString = buildGpx({
metadata: gpx.metadata,
waypoints: gpx.waypoints,
tracks: gpx.tracks,
});
fs.writeFileSync(path.join(__dirname, 'NewTrack.gpx'), newGpxString);
export interface Gpx {
metadata: GpxMetadata;
waypoints: Array<GpxWaypoint> | null;
tracks: Array<GpxTrack> | null;
}
export interface GpxMetadata {
name: string | null;
description: string | null;
creator: string | null;
time: Date | null;
}
export interface GpxWaypoint {
lat: number;
lon: number;
time: Date | null;
name: string | null;
description: string | null;
symbol: string | null;
altitude: number | null;
}
export interface GpxTrack {
name: string | null;
trackpoints: Array<GpxTrackpoint>;
segments: Array<number>;
}
export interface GpxTrackpoint {
lat: number;
lon: number;
time: Date | null;
altitude: number | null;
speed: number | null;
cadence: number | null;
heartRate: number | null;
}
