Adding data to an EXIF file
What is the best metadata editor?
Edit: for (OS) Windows 7 Starter, for geolocation I'm thinking to use Picasa. But, what is the best and simple metadata editor? for JPG
For geocoding photos, I've always used Microsoft Pro Photo Tools which is free and lets you drag and drop onto a map (or aerial view, if you prefer) - it also allows you to upload a GPX track from a GPS unit, and you can match up against that. It also supports setting other metadata, such as photographer information, keywords, or adjusting dates and times.