In Openlayers how do i get the radius of a circle in miles?

Question

I draw a circle on a map in Openlayers and i want to calculate the radius of a circle in miles and display it. How do I do this?

Answer 1

Here's how i ended up doing it.

var measure = event.measure;
var areaSquareMiles =  measure * 0.386102;
var radius = 0.565352 * Math.sqrt(areaSquareMiles);