AGSGraphicsLayer with manual added graphics, all graphics are located at 0,0

ReneNijkamp — Tue, 20 Sep 2011 12:39:47 GMT

Hi all,

I retrieve some data from a webserver, through JSON. This works flawless.
In this data is the latitude, longitude and a name.

I want to add this data to my mapview, i've added a AGSGraphicsLayer to do this.

I add the graphics layer with the following code:

    self.trackLayer = [AGSGraphicsLayer graphicsLayer];
    [self.mapView addMapLayer:self.trackLayer withName:@"trackLayer"];

This works. As expected.

When i push a button the data is received, and added to the map:



    NSArray *locations = [_locationService getLocations];
    
    for (NSDictionary* loc in locations) {
        NSLog(@"%@", loc);
        float lat = [[loc objectForKey:@"lat"] floatValue];
        float lon = [[loc objectForKey:@"lon"] floatValue];
        AGSSimpleMarkerSymbol *pointMarker = [AGSSimpleMarkerSymbol simpleMarkerSymbolWithColor:[UIColor redColor]];
        pointMarker.size = 10.00;
        pointMarker.style = AGSSimpleMarkerSymbolStyleCircle;    

        AGSPoint *point = [AGSPoint pointWithX:lat y:lon spatialReference:self.mapView.spatialReference];

        AGSGraphic *location = [[AGSGraphic alloc] initWithGeometry:point symbol:pointMarker attributes:Nil infoTemplateDelegate:Nil];
        NSLog(@"%@", location);
        [_trackLayer addGraphic:location];
    }
   [_trackLayer dataChanged];

The NSLog produces the following:
geometry: AGSPoint: x = 52.322800, y = 4.879720, spatial reference: [AGSSpatialReference: wkid = 102100, wkt = null], symbol: { AGSSimpleMarkerSymbol: style: esriSMSCircle, size: 10.000000, outline: <AGSSimpleLineSymbol: 0x8c0b50> }, attributes: (null)

When i print the description of the geometry within the Graphics layer:
AGSPoint: x = 52.317799, y = 4.879200, spatial reference: [AGSSpatialReference: wkid = 102100, wkt = null]

So, the coordinates are in the point. For all the testdata. But they are still shown at 0,0!
Whats wrong here? The only thing i saw was that the renderer and initialEnvelope of the GraphicsLayer is 0x0...

Many thanks!

Re: AGSGraphicsLayer with manual added graphics, all graphics are located at 0,0

PaulLohr — Tue, 20 Sep 2011 13:13:27 GMT

I bet you are using a base layer for your AGSMapView that has a spatial reference of something other than 4326 (WGS 1984). If this is the case, try using a base layer that uses the 4326 spatial reference. Or you can use AGSGeometryEngine to convert your points to the coordinate system of your map.

Hope this helps,
Paul Lohr

Re: AGSGraphicsLayer with manual added graphics, all graphics are located at 0,0

ReneNijkamp — Tue, 20 Sep 2011 13:41:39 GMT

Of course! That did the trick 🙂 Thanks!

topic AGSGraphicsLayer with manual added graphics, all graphics are located at 0,0 in ArcGIS Runtime SDK for iOS Questions

AGSGraphicsLayer with manual added graphics, all graphics are located at 0,0

Re: AGSGraphicsLayer with manual added graphics, all graphics are located at 0,0

Re: AGSGraphicsLayer with manual added graphics, all graphics are located at 0,0