To use map services in Windows 10 packages for this application, you need to acquire a token from the Bing Maps Dev Center.
If you are using the map control in Windows Phone 8.1 packages or earlier, you need a map service application ID and a token to include in your code. You can generate this token using the button below. We may share with HERE the developer IDs that are using the map services, because HERE supplies some of these services.
也就是说UWP使用了新的MapServiceToken：Bing Maps Key；而8.1及之前用的是 ApplicationID and an AuthenticationToken.
Display maps with 2D, 3D, and Streetside views ：https://msdn.microsoft.com/en-us/library/windows/apps/mt219695.aspx