
In the last couple of weeks, there have been a number of Wi-Fi location based positioning systems released / renewed or made available in a new form…
Firstly, Google (who have stated one of their goals is to continue to “shrink” the size of the Google Map’s Blue Circle ) is now using Wi-Fi access point information within the “My Location” feature. With the range of most Wi-Fi access points being much smaller than a single mobile cell, using this information will help pinpoint the location of the user more precisely. Initially it is limited to major cities around the world, and initially only the newest version of Google Maps for BlackBerry supports the function (an interesting choice given most BlackBerry devices don’t have both GPS and Wi-Fi…)
Providing a Symbian alternative, Skyhook Wireless, have demonstrated their Wi-Fi Positioning System (WPS) on Symbian v9.5. Now, v9.5 is brand new, and is likely to not feature on any new phones until at least mid-2009 at the earliest (although the odd phone may be announced before then), but it’s nice to see this capability coming to Symbian, if only to keep up with Apple here.
Finally, Brightkite, which is a geo-location based social networking site, have added support for Loki into the main website to allow Wi-Fi based positioning to save the user being forced to search and manually enter their location. Although this does not yet help mobile devices, Loki have an SDK for Maemo (used by the Nokia Internet Tablets) so one would hope a version should be available for that OS soon.
Why all this emphasis on Wi-Fi based positioning when most of the devices under discussion already feature GPS or network coverage? Two reasons; firstly, however hard they try, location detection within buildings is more difficult and slow, whether that’s GPS or cell ID based, and secondly, as already mentioned, that lower range of an individual Wi-Fi access point allows much closer positioning. To show the power of what might be available one day, Nokia Research is working on in-building positioning (using Wi-Fi triangulation) to allow the mobile phone user the ability to locate rooms, printers, restaurants etc. within large building campuses.
Although it would seem at first glance we are risking having multiple Wi-Fi positioning systems, all of which will need to survey or be provided accurate information before being useful, we should point out that Loki uses Skyhook behind the scenes.