I have just tested one of the really compact clip-on GPS units that Reuben Wilcock makes for the D200 on my new Fuji S5 and it works a treat. This means that GPS location data is automatically written into the EXIF everytime you shoot a photo. The GPS unit is here
http://customidea.com/shop/product_info.ph...products_id=121
Once it was attached to the camera I shot a couple of photos in my backyeard and opened them in Lightroom and there in the EXIF data was the Longtitude and Latitude (plus altitude above sea level). I was really pleased to discover that in Lightroom you can click this data to jump to its locations in Google Maps - nice feature!