Are the W3C geolocation API accuracy parameter in diameter or radius of your position?

Maybe i got my head around this wrong, after stfw i could not find any info on this. When the geolocation api returns your position with latitute开发者_运维百科, longitude and accuracy (p.coords.accuracy), does the accuracy parameter return diameter or radius of your position? For instance, if accuracy of my position is 24 meters, does that mean i could be standing anywhere within a radius of 24 meters of my position, or within 12 meters radius of my position (that would give a 24 meters diameter, me being in the middle of the circle of accuracy)

Any help appreciated!

---

It would be the radius. So if the accuracy is 24, then the true position is within 24 meters, which would mean it would lie within a circle with radius 24 around the coordinate.