Reading GPS Data File

rumlac

Hello,

I am trying to find a library or another way of reading a .gpx file or a .tcx file to plot a GPS route in a processing sketch as a line (i.e without the map background). I can't seem to find a library for either file types so if anyone knows of any then that would be great, or if this is not possible then please let me know! Thanks!

PhiLho

If you type GPX in the search box of the main site, you will get lot of hits...

https://www.google.com/search?as_sitesearch=processing.org&as_q=gpx

rumlac

So I have started experimenting with tomc.gpx and I hope to be able to plot the elevation of a .GPX file. And also the route as it appears on a map.

I'm just experimenting at the moment but I think this might be the elevation as it looks similar but I could be wrong:

import tomc.gpx.*;

// outside setup()
GPX gpx;



// inside setup()

void setup() {
  background(255, 255, 255);
  gpx = new GPX(this);
  size(800, 800);

  // when you want to load data
  gpx.parse("stage1.gpx"); // or a URL
}
void draw() {
  // inside draw()

  for (int i = 0; i < gpx.getTrackCount(); i++) {
    GPXTrack trk = gpx.getTrack(i);


    // do something with trk.name


    for (int j = 0; j < trk.size(); j++) {


      GPXTrackSeg trkseg = trk.getTrackSeg(j);


      for (int k = 0; k < trkseg.size(); k++) {

        GPXPoint pt = trkseg.getPoint(k);


        // do something with pt.lat or pt.lon

noStroke();
fill(0,0,0);


        ellipse(width-j*2, height-k*2, 1, 1);


      }
    }

  }

    for (int i = 0; i < gpx.getWayPointCount(); i++) {
      GPXWayPoint wpt = gpx.getWayPoint(i);
      // do something with wpt.lat or wpt.lon or wpt.name or wpt.type
    }
  }