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 permitsvar permitsLayer = new MapImageLayer({
portalItem: {
id: "d7892b3c13b44391992ecd42bfa92d01" }
});
/*****************************************************************
* Add the layer to a map
*****************************************************************/var map = newMap({
basemap: "dark-gray-vector",
layers: [permitsLayer]
});