This example shows how to use CesiumExt.featureInfo.ImageryLayerFeatureInfo
to show the properties
from the features present in one or more Imagery Layers:
The CesiumExt.featureInfo.ImageryLayerFeatureInfo request the user to pick a point to retrieve the properties of a feature.
If MORE THAN ONE feature is found, all of them will be shown in the Feature Property Grid.
Have a look at featureInfo.js to see how this is done.