This sample shows how to add an instance of MapImageLayer to a Map in a SceneView. The MapImageLayer used in this map has two sublayers - one showing lots with pool permits and one depicting lots that don't have pool permits.
// This layer has two sublayers - one showing lots with pool permits
// and one depicting lots that don't have pool permits
var permitsLayer = new MapImageLayer({
portalItem: {
id: "d7892b3c13b44391992ecd42bfa92d01"
}
});
/*****************************************************************
* Add the layer to a map
*****************************************************************/
var map = new Map({
basemap: "dark-gray-vector",
layers: [permitsLayer]
});