calculating distances on a paper map using scale of miles and a ruler. But now there are free online map radius tools that show you at a glance which destinations are within a given distance.

calculating distances on a paper map using scale of miles and a ruler. But now there are free online map radius tools that show you at a glance which destinations are within a given distance.

The Oil and Gas Threat Map; the yellow represents the half-mile “threat radius.” Screenshot: Oil & Gas Threat Map More than 17 million Americans, including nearly 4 million children ...

Drawing a circle with a certain radius around a fixed point could, for instance, show you all the parks within 3.1 miles (5km) of your house. On the other hand, you could draw a circle on a map to ...