How to Shoot with a GPS unit
The secret - keep it on all the time you intend to shoot. It can take up to a minute for a GPS unit to get lock on the GPS satellites when first turned on. Never turn off the GPS unit after that.
NOTE - in downtown areas with tall buildings and inside buildings, the GPS unit will almost certainly lose lock. You will have no GPS until you get back out in the clear. Take this in account when planning your shoot. I add in the GPS locations manually for these shots using Geosetter .
Does battery use go up? Yes, depending on the GPS unit you may need quite a few backup batteries (think rechargeable). The Nikon GP-1 seems to do a good job conserving batteries (it uses the camera's battery), but it still reduces time to change.
Best advice - go out for one of your typical shooting sessions, leave the GPS on the whole time and see how many batteries you need. Be sure to do this before your critical shoot!
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