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Using the navigator.geolocation object in JavaScript. Trying to establish accurate ranges, but wondering exactly how accurate they are.
navigator.geolocation has an accuracy value, but I don’t know what they number relates to in real terms. Does the value have a real world equivalent?
The geolocation standard specified the accuracy as being in meters, and that it should correspond to a 95% confidence level.
So if you draw a circle with a radius of
accuracyaround the actual physical position, (at least) 19 out of 20 reported positions fall within that circle. In practice, this value allows you to roughly gauge the quality of positioning: If it is above 100, the positioning is only accurate to city level. If it is less than 10, the values are of high quality.