Drawing a radius on Google Maps can be useful for businesses that want to visualize their service area or target market. ... If you reach the one-mile mark, the line will turn red.

Starting with New York as a radius point on the FreeMapTools.com Web site, you quickly see that trips to Montreal, Toronto, Cleveland and Virginia Beach, Va., are well within the 500-mile radius.

But now there are free online map radius tools that show you at a glance which destinations are within a given ... expand your radius to 800 miles and you greatly expand your vacation options. .

The analysis finds that this half-mile radius for possible health impacts encompasses 212,747 square miles (551,012 square kilometers)—bigger than twice the size of the state of Colorado—and ...