import any gpx format file
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05-17-2021 10:14 PM
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MarkBaird
We don't directly support GPX data, but its pretty easy to write your own importer. If you look at the file format / specification you will see all the data is XML.
https://wiki.openstreetmap.org/wiki/GPX
So if you can read a track as shown in the link above you will set a set of points which make up a track.
<trk><name>Example gpx</name><number>1</number><trkseg>
<trkpt lat="46.57608333" lon="8.89241667"><ele>2376</ele><time>2007-10-14T10:09:57Z</time></trkpt>
<trkpt lat="46.57619444" lon="8.89252778"><ele>2375</ele><time>2007-10-14T10:10:52Z</time></trkpt>
<trkpt lat="46.57641667" lon="8.89266667"><ele>2372</ele><time>2007-10-14T10:12:39Z</time></trkpt>
<trkpt lat="46.57650000" lon="8.89280556"><ele>2373</ele><time>2007-10-14T10:13:12Z</time></trkpt>
<trkpt lat="46.57638889" lon="8.89302778"><ele>2374</ele><time>2007-10-14T10:13:20Z</time></trkpt>
<trkpt lat="46.57652778" lon="8.89322222"><ele>2375</ele><time>2007-10-14T10:13:48Z</time></trkpt>
<trkpt lat="46.57661111" lon="8.89344444"><ele>2376</ele><time>2007-10-14T10:14:08Z</time></trkpt>
</trkseg></trk>
I've hard coded the points into a polyline as shown:
// points for the track (remember that longitute is X and latitude is Y!
Point pt1 = new Point(8.89241667, 46.57608333, 2376, SpatialReferences.getWgs84());
Point pt2 = new Point(8.89252778, 46.57619444, 2375, SpatialReferences.getWgs84());
Point pt3 = new Point(8.89266667, 46.57641667, 2372, SpatialReferences.getWgs84());
Point pt4 = new Point(8.89280556, 46.57650000, 2373, SpatialReferences.getWgs84());
Point pt5 = new Point(8.89302778, 46.57638889, 2374, SpatialReferences.getWgs84());
Point pt6 = new Point(8.89322222, 46.57652778, 2375, SpatialReferences.getWgs84());
Point pt7 = new Point(8.89344444, 46.57661111, 2376, SpatialReferences.getWgs84());
// collection for the points
PointCollection points = new PointCollection(SpatialReferences.getWgs84());
points.add(pt1);
points.add(pt2);
points.add(pt3);
points.add(pt4);
points.add(pt5);
points.add(pt6);
points.add(pt7);
// create polyline from the points in the collection
Polyline trackGeometrty = new Polyline(points);
// graphic overlay in a map view (could be a scene view for 3D)
graphicsOverlay = new GraphicsOverlay();
mapView.getGraphicsOverlays().add(graphicsOverlay);
// symbol for line
SimpleLineSymbol lineSymbol = new SimpleLineSymbol(SimpleLineSymbol.Style.SOLID, 0xFF00FF00,5);
// graphic from style and polyline
Graphic graphic = new Graphic(trackGeometrty, lineSymbol);
// finally add graphic to graphic overlay
graphicsOverlay.getGraphics().add(graphic);
The end result is this:
So all you need to do is read the xml file remembering that longitude is X and latitude is Y as they are often mixed up.
Does this help?
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