I'm sure I'm missing something very simple. I have an app that is using the world street map as its background layer. This places my map in Web Mercator Auxiliary Sphere (WKID 102100). I have my own dynamic tile layer service over top of that.
I want to add a graphic to the map, but the coordinates are in decimal degrees (WGS84).
Other times, i need to get the decimal degrees that the user is interacting with the map at.
How do i convert between the meters and decimal degree units in windows phone?