In my experience, A-GPS works great. It’s hard to get a GPS signal in urban landscapes but there are tons of WiFi access points around which are very quick at determining your location and are reasonably accurate. I really don’t know what other sensors could bring to the table.
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In my experience, A-GPS works great. It’s hard to get a GPS signal in urban landscapes but there are tons of WiFi access points around which are very quick at determining your location and are reasonably accurate. I really don’t know what other sensors could bring to the table.