Not really: the search parameter is "km/miles from location", not "within a radius of..." (the circle is just a visual estimate). The distance in km/miles from

Not really: the search parameter is "km/miles from location", not "within a radius of..." (the circle is just a visual estimate). The distance in km/miles from A to B is not as the crow flies, it's the number found in any of quite a lot of datasets that gives you all the real world distances between two places so you can do proper distance filtering.