Depends on how you run. If you plot your GPS positions on a map you will notice they jump around a little bit. Generally GPS accuracy is in the 5 to 15 meter range. That can mean quite a zig zag especially considering you are running slow.
So what you could do is some track smoothing/averaging over let's say five positions. That would however introduce an error if you come to a violent halt at an obstacle, or get hit by another runner from the side, or just run around a corner. Get a better GPS receiver with built in tracking. On Mar 8, 10:28 am, fwaokda <[email protected]> wrote: > I'm trying to learn new things and decided as a project to make an > application for recording data from running. I've got a rough > calculation of my distance on runs, but am trying to get it more > accurate. I was hoping someone might have some ideas. Right now I'm > simply accepting gps fixes and then using the distance formula on the > fixes in a sequential order to determine how far I've ran. I'm hoping > however to get the distance more accurate and save battery life. If > anyone has any idea on how I can improve the method I'm using now I > would love to discuss it. > > public void > onLocationChanged(Location location) { > if(location != null) { > if(gpsLats.size() >= > 1) { > > //add new gps > info to List > > gpsLats.add(location.getLatitude()); > > gpsLongs.add(location.getLongitude()); > > //create new > location and store previous gps coordinates > Location loc > = new Location(location); > > loc.setLatitude(gpsLats.get(gpsLats.size()-2)); > > loc.setLongitude(gpsLongs.get(gpsLats.size()-2)); > > //find > distance traveled > tmpDistance > += loc.distanceTo(location)*0.000621371192; > > } else { > > // add first > gps coordinates to List and append to list > > gpsLats.add(location.getLatitude()); > > gpsLongs.add(location.getLongitude()); > > } > > } else { > mSB.append("Location > can not be found!"); > } > > tv2.setText("Distance: " + > Double.toString(tmpDistance) + " > miles"); > tv.setText(mSB.toString()); > > } -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
