Swap web maps in the same view

This sample demonstrates how to initialize multiple WebMaps from ArcGIS for Portal items. You can then switch the active map of a View.

This sample uses the following web maps:

• Missing Migrants - shows all of the missing migrant reports from the International Organization for Migration (IOM). The bright blue symbols represent reports submitted in 2015 or later while the dark blue symbolizes incidents before 2015. The larger symbols represent greater number of reported deaths.
• Refugee Routes - shows refugee routes into Europe.
• 2015 European Sea Arrivals - shows arrivals in southern Europe of refugees by sea, January through July 2015.

Changing the Map used in a View is very simple. You can create an array of WebMaps without loading them.

var webmaps = webmapids.map(function(webmapid) {
  return new WebMap({
    portalItem: {
      id: webmapid
    }
  });
});

Then based on an action, such as a button click, you can switch map of the view to a different map.

// Get an index for the "WebMap" array
var webmap = webmaps[id];
view.map = webmap;