Question:

I have a MapControl and would like to know how many degrees are currently shown on the x and y axes.

First example: <a href="https://i.stack.imgur.com/OiyKp.png" rel="nofollow"><img alt="map landscape" class="b-lazy" data-src="https://i.stack.imgur.com/OiyKp.png" data-original="https://i.stack.imgur.com/OiyKp.png" src="https://etrip.eimg.top/images/2019/05/07/timg.gif" /></a>

360 degrees are shown on the x axis (longitude)

~90 degrees are shown on the y axis (latitude)

(The zoom level is 3.2 and it's max zoomed out)

Second example: <a href="https://i.stack.imgur.com/atwsH.png" rel="nofollow"><img alt="map portrait" class="b-lazy" data-src="https://i.stack.imgur.com/atwsH.png" data-original="https://i.stack.imgur.com/atwsH.png" src="https://etrip.eimg.top/images/2019/05/07/timg.gif" /></a>

~220 degrees on the x axis (longitude)

180 degrees on the y axis (latitude)

(zoom level: 1.7; max zoomed out)

I tried calculating the current degrees on the x axis using following code:

double dist = 360 * Math.Pow(0.5, macSurrounding.ZoomLevel - 1);

but it doesn't work, because the zoom level is just strange...

You should use the MapControl's <a href="https://msdn.microsoft.com/de-de/library/windows/apps/windows.ui.xaml.controls.maps.mapcontrol.getlocationfromoffset.aspx" rel="nofollow">GetLocationFromOffset</a> method to calculate the geographic coordinates of the south-east and north-west corner points of the current map viewport. The width and height of the viewport would be the latitude and longitude differences of these points.

Geopoint northEast; Geopoint southWest; map.GetLocationFromOffset(new Point(map.ActualWidth, 0), out northEast); map.GetLocationFromOffset(new Point(0, map.ActualHeight), out southWest); var width = northEast.Position.Longitude - southWest.Position.Longitude; var height = northEast.Position.Latitude - southWest.Position.Latitude;

Got it:

Longitude:

360 * Math.Pow(0.5, mcMapControl.ZoomLevel - 1) * mcMapControl.ActualWidth / 409.5;

Latitude:

180 * Math.Pow(0.5, mcMapControl.ZoomLevel - 1) * mcMapControl.ActualHeight / 409.5;