Adding image at a fixed location

qiqbaltd · April 24, 2021, 7:20pm

Hi,

What is the best way to add an image to appear on the map at a fixed location (as shown by the red arrow in the attached image)? Is it through viewer.imageryLayers? BTW, what is the difference between viewer.scene.imageryLayers and viewer.imageryLayers? They appear to be the same object to me? Is that correct?

I looked at the imageryLayers API and it appears I need to specify a nav location (lat / long) for my image to appear. But, I want the image to appear at a fixed location and not be changed when I PTZ through the map. And, also be able to remove / hide it later on when it is not needed. How do I do it?

Thanks a lot.

Sincerely,

QIqbal

qiqbaltd · April 28, 2021, 4:54am

Never mind, I tool care of that using regular HTML / JS / CSS stuff. But, I’m still interested in knowing about the following:

Anybody?

dzung · May 3, 2021, 8:19pm

They are the same based on the source code:

github.com

CesiumGS/cesium/blob/829ca79d38ac6e012c6ee67ddba5f691f4781327/Source/Widgets/Viewer/Viewer.js#L1210


      
            },
          },
          
          /**
           * Gets the collection of image layers that will be rendered on the globe.
           * @memberof Viewer.prototype
           *
           * @type {ImageryLayerCollection}
           * @readonly
           */
          imageryLayers: {
            get: function () {
              return this.scene.imageryLayers;
            },
          },
          
          /**
           * The terrain provider providing surface geometry for the globe.
           * @memberof Viewer.prototype
           *
           * @type {TerrainProvider}

If you look at the viewer’s imageryLayers in Viewer.js, it returns the scene’s imageryLayers, which returns the globe’s imageryLayers.

qiqbaltd · May 4, 2021, 6:48pm

Thanks you. That is very helpful.