Have you looked at the "Renderer Walk-Through" in the GeoBase documentation? It shows how to add a point to the map, but the concept is the same, since it allows you how to ensure drawing you've done stays with the map as it moves.
As Pepita says, you're probably wanting to create your own renderer. Some other options are:
1) If you're using SilverStream/Silverlight there's a tutorial that shows you how to draw all sorts of shapes: http://geozone.geobase.info/resources/view/drawing-on-a-silverstream-map
2) Alternatively, what about using a Telogis.GeoBase.Scribble object and adding points to represent a line/rectangle/circle etc?
I tried renderlist and reached somewhere, but still I am not able to draw the line unless there is street data available. Below is the sample code. Actually I dont need street data as my plan is to draw flight routes, basically from one waypoint to another.
I have seen some class for Line and LineString, Could you please give me some samples on how to use the same...
*********** RouteStop[] myRoute = new RouteStop[] { new RouteStop(new LatLon(8,77)), new RouteStop (new LatLon(55,77)) }; Route Route1 = new Route(myRoute[0], myRoute[1]); //Directions myDirection = Route1.GetDirections(); //myDirection.RenderColor = Color.Green; RendererList renderer = new RendererList(); myRoute[0].RenderBrush = new SolidBrush(Color.Green); myRoute[1].RenderBrush = new SolidBrush(Color.Beige); mapCtrl1.Renderer = renderer; renderer.AddRange(myRoute); //renderer.Add(myDirection); mapCtrl1.Invalidate();
Routes are drawn along roads - so I don't think this is what you want for your flight routes. Line and LineString are used for geometries and (I don't think) they're what you want.
Instead, (as I mentioned earlier) check out the Scribble class (I think it's Telogis.GeoBase.Scribble). A scribble is a bunch of arbitrary lines drawn between given points. Here's an example of how you'd use a scribble (I'm typing this on my Mac so I can't check for syntax errors or that it compiles, but you should get the idea).
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Scribble s = new Scribble(); s.Pen = new Pen(Color.Red, 5); // draw the lines in red, 5 pixels thick. If this doesn't work try s.Brush?
s.AddPoint(new LatLon(8, 77)); // first waypoint s.AddPoint(new LatLon(55, 77)); // second waypoint // add more waypoints if you want...
myMapControl.Renderer = s; // draw the scribble on the map
