Accurate of navigator.geolocation.getCurrentPosition

开发者_如何学运维How accurate is result of navigator.geolocation.getCurrentPosition() function?

When it can return low-quality results?

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It depence from type of connection too:

• WiFi ~20m
• GPS ~10m
• GSM ~1km

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have a look at the below

http://www.thedotproduct.org/2010/04/accurate-geo-location-from-apple-iphone-using-navigator-geolocation/

Bear in mind that behind the scene this API uses the mobile cell towers and their signal strengths so it may be not really accurate(it could return few locations against one positions)