topic Graphic always shows at mappoint 0,0 while using latitude and longitude in ArcGIS Runtime SDK for Android Questions

Graphic always shows at mappoint 0,0 while using latitude and longitude

DeepakBhatia — Thu, 12 May 2016 11:20:00 GMT

Hi I am using this code to add a Text SYmbol at given latitude and longitude.(San Francisco)

TextSymbol txtSymbol = new TextSymbol(30, "50", Color.BLUE);

{

Point mapPoint = ConvertMyLocationPoint(-122.4600595,37.7532508);

gr = new Graphic((mapPoint), txtSymbol);

graphicsLayer = new GraphicsLayer();

//add the graphic to the map
graphicsLayer.addGraphic(gr);

mMapView.addLayer(graphicsLayer);

}

private Point ConvertMyLocationPoint(final double longitude, final double latitude) {

Point wgspoint = new Point(longitude, latitude);

Point mapPoint = GeometryEngine.project(longitude,latitude,

mMapView.getSpatialReference());

return mapPoint;

}

The point always shows up at 0,0(lat, long) in the map.

Is this a wrong way to add point when I have latitude and longitude?

Could anyone suggest how to approach this.

Thanks.

Re: Graphic always shows at mappoint 0,0 while using latitude and longitude

ShellyGill1 — Tue, 17 May 2016 09:55:26 GMT

Hi Deepak,

I could see anything that looked wrong with your code - I put this into an app, and found the '50' text symbol displays at San Francisco as expected. The ConvertMyLocationPoint function returned a Point like this:

mapPoint.getX() - -1.3632191466053985E7

mapPoint.getY() - 4544626.829865076

How is your MapView defined? That's where the coordinate system is being taken from, so I wonder if that is the problem in your case. Here is the MapView definition I was using - as I'm using the Esri basemaps, the spatial reference is Web Mercator Auxiliary Sphere (id = 102100).

<com.esri.android.map.MapView
   android:id="@+id/map"
   android:layout_width="fill_parent"
   android:layout_height="fill_parent"
   mapoptions.MapType="Streets"
   mapoptions.ZoomLevel="1"
   />

What is the Spatial Reference that you're projecting the point to? Does the returned Point definately have 0,0 as coordinates?

Regards

Shelly