HTML5 Geolocation, GPS Only

Question

Is there a way to make HTML5's Geolocation only work, if it is using a GPS device to get the location?

Solution

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.

Comments

[Kevin]

Yep, I'd second this. The implementation on the browser controls how location is determined and they pretty much all try most accurate (GPS) and fall back to network based detection.

[John]

Yes, that is actually how I ended up implementing what I needed. Watching the accuracy until it was in a desired range allowed me to verify a user's location using a mobile web app.