Value does not fall within the expected range Geob

Question

im trying to fit 2 pois on a bing map for WinRT Universal APP, commonly user position and any other point, so the user can see the map between two points, i have this code:

private void centerMap(Geoposition pos, MapPoi pos2)
    {
        try { 
    #if WINDOWS_APP
            //TODO PC Maps
    #elif WINDOWS_PHONE_APP
        GeoboundingBox geoboundingBox = new Windows.Devices.Geolocation.GeoboundingBox(
        new BasicGeoposition() { Latitude = pos.Coordinate.Latitude, Longitude = pos.Coordinate.Longitude },
        new BasicGeoposition() { Latitude = pos2.lat, Longitude = pos2.lng });
        map1._map.TrySetViewBoundsAsync(geoboundingBox,null,MapAnimationKind.Linear);
    #endif
    }catch(Exception ex)
    {
        Debug.WriteLine(ex.ToString());
    }
    }

So one more time i have a problem i cannot solve myself.

First i need to understand something that i must be doing bad, im getting System.ArgumentException on the GeoboundingBox constructor, here stack trace:

A first chance exception of type 'System.ArgumentException' occurred in EspartAPP.WindowsPhone.exe
System.ArgumentException: Value does not fall within the expected range.
   at Windows.Devices.Geolocation.GeoboundingBox..ctor(BasicGeoposition northwestCorner, BasicGeoposition southeastCorner)
   at EspartAPP.Modulos.Modulo_Mapa.centerMap(Geoposition pos, MapPoi pos2)

Here are the coordinates used for the test:

pos var: Lat 40.4564664510315 lng -3.65939843190291
pos2 var: Lat 40.4579103 lngs -3.6532357

Both coordinates are correct, one is the user position just got from gps, the other is a close location.

I cant understand what can be going bad, there must be something that i need to know.

The code i posted just throw that exception, but, if i just do +1 to the pos latitude it works, and seems to be doing it right.

If i add pos2 first (as northwestCorner) it doesnt throw exception, it zooms out to max so i can almost see the entire map (which is obviously wrong)

There must be some rules im ignoring, maybe i have to calc which coordinate should be on northwest position?

EDIT: Was exactly that, working code:

 private void centerMap(Geoposition pos, MapPoi pos2)
    {
        try {
            BasicGeoposition nw = new BasicGeoposition();
            nw.Latitude = Math.Max(pos.Coordinate.Latitude, pos2.lat);
            nw.Longitude = Math.Min(pos.Coordinate.Longitude, pos2.lng);
            BasicGeoposition se = new BasicGeoposition();
            se.Latitude = Math.Min(pos.Coordinate.Latitude, pos2.lat);
            se.Longitude = Math.Max(pos.Coordinate.Longitude, pos2.lng);


    #if WINDOWS_APP
            //TODO PC Maps
    #elif WINDOWS_PHONE_APP
        GeoboundingBox geoboundingBox = new Windows.Devices.Geolocation.GeoboundingBox(nw,se);
        map1._map.TrySetViewBoundsAsync(geoboundingBox,null,MapAnimationKind.Bow);
    #endif
    }catch(Exception ex)
    {
        Debug.WriteLine(ex.ToString());
    }
    }

Sorry for my bad english and problems with this bing maps, this is really poor documented i expect because its the newer API and its a mess to find what you need for the API you are working for.

Thanks in advance.

Answer 1

You are not providing the correct coordinates. As you can read here the first coordinate must be upper left corner of the region (the north west coordinate), the second must be the lower right corner (the south east coordinate). Your pos is the lower left corner and pos2 is the upper right corner.

You get the right coordinates like this:

var nw = new BasicGeoposition();
nw.Latitude = Max(pos.Coordinate.Latitude, pos2.lat);
nw.Longitude = Min(pos.Coordinate.Longitude, pos2.lng);
var se = new BasicGeoposition();
se.Latitude = Min(pos.Coordinate.Latitude, pos2.lat);
se.Longitude = Max(pos.Coordinate.Longitude, pos2.lng);