public boolean writeExifGpsInfo(File jpeg, Wpt wpt, boolean overwrite){
String[] cmd = buildCommand(jpeg, wpt);
ProcessRunnable ps = new ProcessRunnable(cmd);
ps.redirectErrorsTo(System.err);
ps.redirectOutputTo(System.err);
ps.run();
return true;
}
/** Returns whether this GpsExifWriter writer will or will not
* overwrite existing gps information regardless of the <code>overwrite</code>