Some applications require the ability to keep all users view of the data in sync in real-time, without requiring an update or page refresh. In this talk we will look at a simple demo application the DTSAgile team created to investigate real-time technologies. This Disaster Damage Assessment demo app uses real-time communication to allow users (desktop or mobile) to share real-time "state" as different types of assessments are completed. The idea being that when an "injury" is reported, appropriate medical teams can be dispatched to the location. In this part, we will show a simple node.js app that uses socket.io to send notifications between clients and the server, as well as sending the point locations to an ArcGIS Server feature service. The desktop client uses the Esri Javascript API, and the mobile version uses Leaflet.js. Both consume ArcGIS Server Map Services. Demo site: node.dtsagile.com Code: https://github.com/dtsagile/dmg-express
