Geodata is location specific information that can help identify exactly where your images were taken. It is becoming increasingly important as image libraries and image buyers seek to identify specific locations and the inclusion of accurate geodata can enhance the perceived value of your images.
Especially important to travel photographers who shoot in a variety of locations in quick succession, geocoding is going to become a standard requirement in the very near future. Indeed, it already is for certain agencies.
This tutorial illustrates my own geocoding techniques involving a GPS device, Lightroom and a Mac application called HoudahGeo.
I also show how you can open up the hidden link between Lightroom and Google Maps and explain how to create a visual diary of your photo expeditions in Google Earth.
GeoSetter does pretty much the same thing for PC I think, from your description. That is, from a GPS device or just from Google maps you can get the Latitude and Longitude appearing in Lightroom’s metadata box.
I don’t know if HoudahGeo also gives one the option of automatically looking up place names from the Lat & Long data (and populating the location metadata fields if you want) as GeoSetter does….the only problem I’ve found so far with this option is that the place names are either way too general or (in the case of locations near me in the wilderness of East London) just plain wrong…..so I think I’ll stick to checking the names on a map for now.