How to give a correct envelope for ImageOverlay?

FatmaAkdemir

We have SceneGraphicsView where we add a QImage (radar image) as an ImageOverlay. Our image is a circle with 40km radius. I want to give the center point of this circle as the Envelope's center point. However, the ImageOverlay does not appear in the given point. (Lon: 29.444835, Lat: 40.785893) What am I missing?

When I change the width and height parameters in Envelope constructor, size of the imageOverlay does not change too much.

 

void MainMapWidget::addImageToMap(){
m_imageOverlay = new ImageOverlay();
m_sceneView->imageOverlays()->append(m_imageOverlay);
const Point pointForImageFrame(29.444835, 40.785893, SpatialReference::wgs84());
m_pacificSouthwestEnvelope = Envelope(pointForImageFrame, 0.474571, 0.361748);
m_imageOverlay->setOpacity(0.5);
Camera camera(40.785893, 29.444835, 10010.0, 0, 0, 0.0);
m_sceneView->setViewpointCameraAndWait(camera);

}

void MainMapWidget::slotRadarImageChanged(const QImage &image){
std::unique_ptr<ImageFrame> m_imageFrame = std::make_unique<ImageFrame>(image, m_pacificSouthwestEnvelope);
m_imageOverlay->setImageFrame(m_imageFrame.get());
}

KoushikHajra

Hello,

Thank you for reaching out to us. I don't see anything that's obviously wrong in your code. Can you please let me know a couple of things? 

 - When you say the image is not rendering at the right location, where does it render? Is it rendering at 0, 0? 

- If you print the json of the envelope in the slot slotRadarImageChanged, do you get a valid geometry?

 - I am guessing the images themselves are not georeferenced? But I just want to double check.

 - Also, can you try just a single image and see if that works? Something like below:

// clear any existing overlays
  m_sceneView->imageOverlays()->clear();

  const QImage image(imagePath);
  ImageFrame* imgFrame = new ImageFrame(image, m_env, this);
  connect(imgFrame, &ImageFrame::doneLoading, this, [this, imgFrame](Error error)
  {
    Viewpoint vp(imgFrame->extent());
    m_sceneView->setViewpoint(vp);
  });

  ImageOverlay* imgOverlay = new ImageOverlay(this);
  imgOverlay->setImageFrame(imgFrame);
  m_sceneView->imageOverlays()->append(imgOverlay);