private void UpdateMap() { if (!mapInit) { InitMap(); } gMapControl1.Overlays.Clear(); GMapOverlay markersOverlay = new GMapOverlay("markers"); this.gMapControl1.Overlays.Add(markersOverlay); IEnumerable <DbTweet> tws = core.GetGeolocatedTweets(10); foreach (DbTweet tw in tws) { try { Console.Out.WriteLine(">>> MAP: " + tw.Coord.Item1 + ", " + tw.Coord.Item2); //gMapControl1.Visible = false; GMarkerGoogle marker = null; if (tw.Coord != null) { marker = new GMarkerGoogle(new PointLatLng(tw.Coord.Item1, tw.Coord.Item2), new Bitmap(core.GetTopicImage(0, core.GetDbTopicFromId(tw.About[0])))); marker.ToolTip = new GMapToolTip(marker); marker.ToolTip.Font = new Font(FontFamily.GenericSansSerif, 8); marker.ToolTipText = tw.Author + "\nPos: " + tw.PosValue + " - Neg: " + tw.NegValue + "\n\n"; String twText = tw.Text; while (twText.Length > 40) { marker.Tag += twText.Substring(0, 40) + "\n"; twText = twText.Substring(40); } marker.Tag += twText; //marker.Offset = new Point(10, 10); } markersOverlay.Markers.Add(marker); } catch (Exception e) { Console.Out.WriteLine("Problema al agregar marker: " + e.Message + "\n" + e.StackTrace); } } this.gMapControl1.Overlays.Add(markersOverlay); //gMapControl1.Visible = true; gMapControl1.Update(); }