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Is there a way to make HTML5's Geolocation only work, if it is using a GPS device to get the location?
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HTML5 geolocation lets you find the geographic coordinates of a website visitor's current location like the longitude and the latitude. The information provided by HTML 5 geolocation can be used to optimise the browsing experience.
Depending on the availability of GPS on the device and the quality of the mobile/WIFI signals, HTML5 geolocation can be very accurate i.e. to a street level. Hence it can be used to pin point a device's location making it a very useful technology for websites or apps that require the exact user's location to work.
The HTML Geolocation API is used to locate a user's position.
I don't believe it's possible, the best you can do is pass true for enableHighAccuracy and use a heuristic based on the accuracy value.
--Edit
I saw a presentation by Remy Sharp last month and he had a useful suggestion: if you use watchPosition instead of getCurrentPosition then you can wait until the location information becomes accurate enough; GPS often takes some time to lock on to satellites so usually getCurrentPosition will just return something from one of the less accurate but more responsive methods.
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