topic Polyline never cross the 180 meridian in ArcGIS Runtime SDK for Android Questions

Polyline never cross the 180 meridian

PatrickBolduc — Fri, 08 Dec 2017 15:14:55 GMT

Hi,

When I try to draw a polyline that cross the 180 meridian, the polyline always go across the earth instead of crossing the 180 meridian as I would expect. I am using the 100.1 version of Android ArcGIS runtime.

Here is an example to reproduce the issue and a screenshot

public class PolylineAcross180MeridianActivity extends AppCompatActivity
{
private MapView mapView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_polyline_across180_meridian);
mapView = findViewById(R.id.map_view);
  mapView.setMap(new ArcGISMap(Basemap.createImagery()));
  final GraphicsOverlay overlay = new GraphicsOverlay();
  mapView.getGraphicsOverlays().add(overlay);
  final Point p1 = new Point(-170, 0.0, SpatialReferences.getWgs84());
  final Point p2 = new Point(170, 0.0, SpatialReferences.getWgs84());
  final Polyline polyline = new Polyline(new PointCollection(Lists.newArrayList(p1, p2)));
  final SimpleLineSymbol simpleLineSymbol = new SimpleLineSymbol(SimpleLineSymbol.Style.SOLID, getColor(android.R.color.holo_red_dark), 5f);
  overlay.getGraphics().add(new Graphic(polyline, simpleLineSymbol));
}
}

Is it a way to have the polyline cross the 180 meridian ?

Regards,

Patrick

Re: Polyline never cross the 180 meridian

AlexanderNohe1 — Wed, 13 Dec 2017 16:33:14 GMT

Rather than have your second point be at 170, what happens if you set your second point to -190 ?

Re: Polyline never cross the 180 meridian

JamieHolloway — Sun, 17 Dec 2017 00:23:55 GMT

This is a great question Patrick. I am a newbie to ArcGIS Pro, the dev APIs, and ESRI in general...but I am unable to project a line that crosses the meridian by either using configuration settings, such as 'enable wrapping around date line,' or by writing code to split the line into a polyline that attempts to create a pivot point over the meridian. I have this problem with the ArcGIS Pro app, and when using JavaScript APIs. It does not work for either Mercator or spherical projections. My kml / Google Earth solution does this by default. I've studies the esri forums w/o solution... Its a real show stopper. I have ESRI-expert colleagues who have not been able to guide me to a solution yet...