Geotagging of Photos made simple

***What is Geotagging? 

Geotagging is a simple process of writing the Geographic information to Exif data in the images. 
Geographic information includes Lattitude, Longitude, Height and other related information. 

***Why should I Geotag? 

When fotos are Geotagged, it makes it simple for the viewers to pinpoint the exact location where the foto was shot, and also saves the creator from the hassle of remembering each of the locations. 

Geotagging is also now read by most of the popular sites like flickr, provides an amazing integration with Google maps to show a Location Map of the fotos you have taken. 

How wonderful it would be to see your pics on google map with the exact location details. 

***Do i need a GPS receiver to Geotag my fotos? 

No you dont need a GPS receiver to do it, although a GPSr may get the exact co-ordinates of the location and saves the hassle of manually searching the co-ordinates. 

***How do I Geo tag my fotos? 

There are a couple of free tools to do the job. 
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you can use GPicSync, it's open source and supports the following raw filetypes: 
http://code.google.com/p/gpicsync/wiki/RawFormats 

Very nice, have a try: http://code.google.com/p/gpicsync/ 
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Detailed instructions here: 
http://www.oziphototool.com/smf/index.php?topic=124.0 
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The latest Picasa has a great integration with Google Earth... It wont let you write to CR2 files, but will store in a .ini file. 

For JPEGs it write the exif, you can upload the photos to Flickr and Picasa Web and they will show in the map. 
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***How do i find the location co-ordinates? 

Its very easy with Google Earth or google Maps, if you know the location, search in Google Earth and that will give you the exact details required. 
Picasa also has an integration with Google earth and writes values to JPG files. 

***What is the difference between Geotagging and GeoStamping? 

Tagging means writting GPS coordinates into EXIF metadata -same as writing/changing (for example) variuos DateTime values. Important is: tagging doesn't change image! With other words: when you open geo-tagged image, you don't see GPS coordinates (you need some exif utility to see and edit those values). 

Stamping means you (using some utility) "write" coordinate values directly onto image. So, everybody will see those values by opening/viewing image (you remember old photos containing date/time when they were taken?). The problem is, it is difficult to edit stamped images later. In short: GPS stamped images are not very artistic -they look ugly, actually  

***Examples? 
I have tried Geotagging some images and here is how they look on my site, scroll to the bottom of the page to see the Google maps. 

http://www.vividscapes.com/gallery/main.php?g2_itemId=5790 

Missing any information?, please feel free to add or correct me where ever am wrong.