Looking for a little advice please.
I am looking for a way to be able to geotag my images as I take them.
What options are available for the D800
.
The easiest way is a GPS unit that connects to your camera.
Nikon's GP-1a is ridiculously overpriced, at just the far side of $300, but will do exactly what you're asking for here. Fortunately, there are a number of third-party knockoffs, at much more reasonable prices. About a year ago, I bought
this one for about $50, and I have not been dissatisfied with it. I doubt
Nikon's unit works any better than
this one does.
About the only thing I could wish for out of such a device, that this one doesn't have (and as far as I know, no comparable unit yet does) is support for GLONASS as well as GPS. GLONASS is Russia's alternate to GPS, and the only other fully-functional navigation system of this type. My cell phone (A Samsung Galaxy S3) support both. GLONASS might be a bit better, by itself, than GPS, but the two of them being used together, as my cell phone does, is much better than either of them individually. I'd love to have a GPS/GLONASS unit for my camera that works as well as my cell phone does; but for now, I think we're stuck with GPS only.
I dont [sic] normally take my phone out and about when I go rambling, and when we go abroad, the internet is prohibitively expensive so using my phone is not really an option.
There are a number of methods that involve using your cell phone's GPS to record position information to be used to tag photographs. If your cell phone supports GLONASS as well, then it may be worth the considerable extra trouble to use this compared to an on-camera GPS. One thing you should know is that
GPS and GLONASS support do not require internet or cell phone connections; so your issue with the cost of your internet access really isn't an issue here.