gmaps-radius

This very simple little web app allows you to draw circles on top of a Google Map, with a radius that you specify.

Try it out.

Original repository.

Query parameters

This tool supports the following optional query parameters:

• lat: Viewport center latitude
• lng: Viewport center longitude
• z: Default zoom level
• r: Default circle radius
• u: Default circle radius units

If lat and lng are given on initial load, a circle will drawn. This allows sharing by copy-pasting full URL's.