From: Bruce Walker
On 11-02-08 9:27 AM, Collin Brendemuehl wrote:
> Be aware, though, that they are battery hogs.
> Big time.
> (this from personal experience)
Can the WiFi stuff can be disabled (ie powered-off, like in an iPod
Touch) when shooting in the field where all you need is the GPS
function? Or is the GPS h/w itself the battery hog?
http://preview.tinyurl.com/34blok2
Looking through the web site (which sucks BTW) I found that it's not
really GPS. It's something called WPS that uses nearby wi-fi networks to
generate the location data.
It captures data on nearby accessable wi-fi MAC addresses and adds them
to the photo for uploading to Eye-fi's site.
Once the photo is uploaded to their site, the MAC addresses are compared
to the "known locations" of MAC addresses in their database and the
long/lat are triangulated from those and downloaded to the card in the
camera for addition to the EXIF.
So I guess the answer to your question is the wi-fi can't be turned off
independently and the "GPS" itself is the battery hog.
Skyhook's coverage map:
http://www.skyhookwireless.com/howitworks/coverage.php
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