Is there an easy way to determine the maximum and minimum visible latitude and longitude in a VirtualEarth map? Given that it's not a flat surface (VE uses Mercator projection it looks like) I can see the math getting fairly complicated, I figured somebody may know of a snippet to accomplish this.
+1
A:
Using the Virtual Earth Interactive SDK, you can see how to convert a pixel point to a LatLong object:
function GetMap()
{
map = new VEMap('myMap');
map.LoadMap();
}
function DoPixelToLL(x, y)
{
var ll = map.PixelToLatLong(new VEPixel(x, y)).toString()
alert("The latitude,longitude of the pixel at (" + x + "," + y + ") is: " + ll)
}
Take a further look here: http://dev.live.com/virtualearth/sdk/ in the menu go to: Get map info --> Convert pixel to LatLong
To get the Max/Min visible LatLong's, you could call the DoPixelToLL method for each corner of the map.
MartinHN
2009-02-25 17:48:29
Looking at the documentation in PixelToLatLong, looks like GetMapView is what I need: To obtain the bounding area of a map in 3D mode, call the VEMap.GetMapView Method.
Serguei
2009-02-25 18:17:32
+2
A:
Found it! VEMap.GetMapView() returns the bounding rectangle, even works for 3D mode as well (where the boundary is not even a rectangle).
var view = map.GetMapView();
latMin = view.BottomRightLatLong.Latitude;
lonMin = view.TopLeftLatLong.Longitude;
latMax = view.TopLeftLatLong.Latitude;
lonMax = view.BottomRightLatLong.Longitude;
Serguei
2009-02-25 18:14:43