From the first time I saw the power in geotagging images I was immediately hooked. My Nikon D90 is capable of geotagging, but, unlike the S100 (for example) it has no internal GPS and requires the somewhat pricy GP-1 GPS Unit. I set out to make a better cheaper solution.
I started by doing a lot of research on this topic and it turns out that there is a fairly simple way to connect a receiver to a Nikon camera. Simple, if you don’t mind a bit of makering