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mil2525 std in arcgis qt

AbhijeetSatam

I am using dictionarySymbolStyle and dictionary renderer in ArcGIS qt 100.5 to read and display symbols from a style file. The code for the function is as follows. m_mapView is my MapGraphicsView object. The application is successfully built. The map is displayed in the output window however the points aren't displayed. The points are displayed using a simplemarkersymbol but not using the dictionary symbology. Can somebody guide me why this problem is occurring??

void offlinemap2d::addPointsFromStyleFile()

{

   //create a new graphicsoverlay
   GraphicsOverlay* graphicsOverlay = new GraphicsOverlay(this);
   // create a list of points
   const QList<Point> pointsList

      {
      Point(72.852642647560347, 19.092812566811544, SpatialReference::wgs84()),
      Point(72.8708416959572303, 19.08444173689877, SpatialReference::wgs84()),
      Point(32.6697273884990937, 56.064250073402874, SpatialReference::wgs84()),
      Point(32.6395150461199726, 56.06127916736989, SpatialReference::wgs84())

};

   // create the symbology for the points
   dictionarySymbolStyle = new DictionarySymbolStyle("mil2525d",":/Res/mil2525d.stylx", this);
   DictionaryRenderer* renderer = new DictionaryRenderer(dictionarySymbolStyle, this);

graphicsOverlay->setRenderer(renderer);

   foreach (const Point &buoyPoint, pointsList)
      {
            graphic = new Graphic(buoyPoint, this);
  graphicsOverlay->graphics()->append(graphic);
       }

//add overlay to the map
m_mapView->graphicsOverlays()->append(graphicsOverlay);

}

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JamesBallard1

Hi Abhijeet Satam‌,

The mil2525d standard requires attributes to know which graphic to display. These are provided as attributes to the Graphic each time one is created.

We do have some samples that show this workflow. Please take a look at these and let us know if this helps.

arcgis-runtime-samples-qt/ArcGISRuntimeSDKQt_CppSamples/DisplayInformation/GODictionaryRenderer_3D at master · Esri/arcg…

arcgis-runtime-samples-qt/ArcGISRuntimeSDKQt_CppSamples/DisplayInformation/GODictionaryRenderer at master · Esri/arcgis-…

You'll notice that both samples read the attributes in from an xml file and parse that info into the coordinates and attributes for each graphic.

AbhijeetSatam

Hi James,

I need my application to be in native cpp . Can you provide a link or solution to read attributes and coordinates using CPP ?

JamesBallard1

Abhijeet Satam‌,

Yes, our C++ example code is doing all that logic in native C++, not QML.

Please take a look at the GODictionaryRenderer::parseXmlFile and GODictionaryRenderer::createGraphic methods in these code snippets.

arcgis-runtime-samples-qt/GODictionaryRenderer.cpp at 9b1d3bbe3f6732fa048835a031630760f8e0223c · Esri/arcgis-runtime-sam…

The xml file used by the sample code is linked on the landing page for the sample

arcgis-runtime-samples-qt/ArcGISRuntimeSDKQt_CppSamples/DisplayInformation/GODictionaryRenderer at master · Esri/arcgis-…

AbhijeetSatam

Hi James,

Accoding to your suggesstion I have tried to incorporate the sample code into my application.

I want to display the following points on the map using mil2525 symbology: ( point - lat , long, spatial ref)

      Point 1 - 72.852642647560347, 19.092812566811544, SpatialReference::wgs84()),
      Point 2 - 72.8708416959572303, 19.08444173689877, SpatialReference::wgs84()),

So I added these points to the point collection using addPoint() in the createGraphic function . No changes have been made to the parseXmlFile function code. Following is the code snippet. Are any more changes needed in the sample code?

void offlinemap2d::addPointsFromStyleFile()

{

   //create a new graphicsoverlay
   GraphicsOverlay* graphicsOverlay = new GraphicsOverlay(this);

graphicsOverlay->setRenderer(renderer);

//add overlay to the map

parseXmlFile();
m_mapView->graphicsOverlays()->append(graphicsOverlay);

}

void offlinemap2d::createGraphic(QVariantMap rawAttributes)
{
      // If _wkid was absent, use WGS 1984 (4326) by default.
      int wkid = rawAttributes.count(FIELD_WKID) > 0 ? rawAttributes[FIELD_WKID].toInt() : 4326;
      SpatialReference sr(wkid);
      Geometry geom;

      // It's a multipoint
      MultipointBuilder* builder = new MultipointBuilder(sr, this);
      PointCollection* collection = new PointCollection(sr, this);
      collection->addPoint(72.852642647560347, 19.092812566811544);

      collection->addPoint(72.8708416959572303, 19.08444173689877);
      builder->setPoints(collection);
      geom = builder->toGeometry();

      if (!geom.isEmpty())
      {
            // Get rid of _control_points and _wkid. They are not needed in the graphic's
            // attributes.
            rawAttributes.remove(FIELD_CONTROL_POINTS);
            rawAttributes.remove(FIELD_WKID);

Graphic* graphic = new Graphic(geom, rawAttributes, this);
graphicsOverlay->graphics()->append(graphic);
}
}

Can you also explain what is meant by the control points attribute in the Mil2525DMessages.xml file. Are these control points coordinates where the symbol has to be displayed on the map??

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