Is there a way to determine miles/meters based on the zoom and scale of the map.
Example the map has center starting coordinates defined based on a center radius search with a default miles, i.e. "You are Here" marker. Other markers are displayed based on the initial result of the center radius search. The screen's zoom rate must be adjusted to display all markers returned.
As the user zooms out a measurement of the next zoom rate is calculated into miles/meters and a new data get occurs returning additional markers within the new search radius.
For Bing maps I have looked at the following article:
But I am still not sure how to accomplish the desired functionality described above.