GPS-Logger/static/gps_logger/GPXParser.js

GPXParser.js

GPXParser.js is a lightweight JS library wich parse .gpx file and get or compute various datas like

• GPX metadata
• total and cumulate distances
• min, max, average, positive and negative height différence

GPX ? What is this ?

Wikipedia say :

GPX, or GPS Exchange Format, is an XML schema designed as a common GPS data format for software applications.

gpx files are based on xml with specific tags and attributes

For more information about gpx format see http://www.topografix.com/gpx_manual.asp

How to do

Install from npm

npm install --save gpxparser

Load JavaScript file

From an HTML document :

<script src="./js/GPXParser.js"></script>

From a node.js script :

let gpxParser = require('gpxparser');

Create and parse file

var gpx = new gpxParser(); //Create gpxParser Object
gpx.parse("<xml><gpx></gpx></xml>"); //parse gpx file from string data

Use the gpx Object

var totalDistance = gpx.tracks[0].distance.total;

Export gpxParser Objecto to GeoJSON

let geoJSON = gpx.toGeoJSON();

Documentation

Property	Type	Description
xmlSource	XML	XML Object parsed from gpx string file
metadata	Metadata object	File metadata
waypoints	Array of Waypoint object	Array of waypoints
tracks	Array of Track object	Array of waypoints of tracks
routes	Array of Route object	Array of waypoints of routes

Metadata object

Property	Type	Description
name	String	File name
desc	String	Description
link	Link object	Web address
author	Float	Author object
time	DateTime	Time

Waypoint object

Property	Type	Description
name	String	Point name
cmt	String	Comment
desc	String	Point description
lat	Float	Point latitute
lon	Float	Point longitude
ele	Float	Point elevation
time	Date	Point time

Track object

Property	Type	Description
name	String	Point name
cmt	String	Comment
desc	String	Point description
src	String	Used device
number	String	Track identifier
link	String	Link to a web address
type	String	Track type
points	Array	Points object array
distance	Distance Object	Distance informations about the Route
elevation	Elevation Object	Elevation informations about the Route
slopes	Float Array	Slope of each sub-segment

Route object

Property	Type	Description
name	String	Point name
cmt	String	Comment
desc	String	Point description
src	String	Used device
number	String	Track identifier
link	String	Link to a web address
type	String	Route type
points	Array	Points object array
distance	Distance Object	Distance informations about the Route
elevation	Elevation Object	Elevation informations about the Route
slopes	Float Array	Slope of each sub-segment

Point object

Property	Type	Description
lat	Float	Point latitute
lon	Float	Point longitude
ele	Float	Point elevation
time	Date	Point time

Distance object

Property	Type	Description
total	Float	Total distance of the Route/Track
cumul	Float	Cumulative distance at each point of the Route/Track

Elevation object

Property	Type	Description
max	Float	Maximum elevation
min	Float	Minimum elevation
pos	Float	Positive elevation difference
neg	Float	Negative elevation difference
avg	Float	Average elevation

Author object

Property	Type	Description
name	String	Author name
email	Email object	Email address of the author
link	Link object	Web address

Email object

Property	Type	Description
id	String	Email id
domain	String	Email domain

Link object

Property	Type	Description
href	String	Web address
text	String	Link text
type	String	Link type