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
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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.