Displaying a polyline of geo-coordinate objects

Question

I have a bunch of GeoCoordinate objects that I want to display as a polyline (to show the path that a person took).

My unsuccessful attempt (does not display the string):

var map = new Map(); // Nokia Maps var layer = new MapLayer(); var overlay = new MapOverlay(); var polyline = new MapPolyline(); var gc = new GeoCoordinateCollection(); foreach(var geo in MyGeoCoordinateList) { gc.Add(geo); } polyline.Path = gc; polyline.StrokeColors = Colors.Red; polyline.StrokeThickness = 3; overlay.Content = polyline; layer.Add(overlay); map.Layers.Add(layer); LayoutRoot.Children.Add(map); 

Answer 1

I wanted to do the same, I used GeoQuery, passing in all waypoints. The request generated a route, which I then displayed in the user interface.

 var query = new RouteQuery(); query.Waypoints = new[] { new GeoCoordinate(40.7840553533410,-73.9764425910787), new GeoCoordinate(40.7833068308611,-73.9745997113487), new GeoCoordinate(40.7826229881351,-73.9730985576614), new GeoCoordinate(40.7821147220884,-73.9719513345183), new GeoCoordinate(40.7809503161196,-73.9724639235822), new GeoCoordinate(40.7803311395532,-73.9721954245488), new GeoCoordinate(40.7795640919224,-73.9729398991417), }; query.TravelMode = TravelMode.Walking; var result = await query.GetRouteAsync(); var mapRoute = new MapRoute(result); mapRoute.Color = Colors.Magenta; mainMap.AddRoute(mapRoute); 

mainMap is a Map control in my user interface. The request creates a route following the accessible path (since I designated it as a foot path, he used foot paths in the central park).

Answer 2

It turns out that to display the path (which simply connects the points and does not follow the roads, as in the example of Mike Brown) you need to add a polyline to the MapElements object, that is:

 var map = new Map(); // Nokia Maps var polyline = new MapPolyline(); var gc = new GeoCoordinateCollection(); foreach(var geo in MyGeoCoordinateList) { gc.Add(geo); } polyline.Path = gc; polyline.StrokeColors = Colors.Red; polyline.StrokeThickness = 3; map.MapElements.Add(polyline); LayoutRoot.Children.Add(map); 

As a bonus here, how to install a map so that it contains dots in the presentation port (with nice animation):

 map.SetView(LocationRectangle.CreateBoundingRectangle(MyGeoCoordinateList, MapAnimationKind.Parabolic);