A C# IoT geolocation simulator
The simulator will traverse a route, given orgin/dest as two geopoints. In this example, the lambda will be invoked every 5 seconds with current simulation state of the vehicle. You may modify the lambda to send events to whatever you like; console, event hub, service bus, etc. The provided example acts as an IoT device sending events to Azure IoT Central.
v.Speed is in meters/s, the times 3.6 converts it into kilometers/h. The telemetry is then sent on to IoT central using the azure DeviceClient library.
Task consumer = new Vehicle(drivingRoute).StartTrip(async (IoTState v) =>
{
var telemetryDataPoint = new
{
Location = new { lon = v.Longitude, lat = v.Latitude },
Speed = v.Speed * 3.6M
};
var messageString = JsonConvert.SerializeObject(telemetryDataPoint);
var msg = new Message(Encoding.UTF8.GetBytes(messageString));
System.Console.WriteLine(messageString);
await deviceClient.SendEventAsync(msg);
}, 5);The simulator uses Azure Maps as a route source. The Azure Maps route api returns a set of line segments trace real life roads and highways. Normally that data is intended for showing a driver the route superimposed on a road map, however, the simulator takes that same information and "traces" the lines with geo coordinates.
In the above diagram you can see how the real roadway is represented as a set of line-segments. Just as with computer graphics, it can only represent the curvature at some granularity. Given the line-segments the simulator further divides them into meters, so that the simulation can produce geo coordinates with respect to some speed (meters per second).