Src largest (tag)
From SnapMap
src_largest=<url> is to point to the largest size file of the image that is available via a URL. Like src (tag), which is the tag for the size most suitable for a webpage, the URL must be fully specified, including 'http://'.
Example
src_largest=http://lh6.ggpht.com/_hitTma0KrLI/SCh7rrxX9kI/AAAAAAAAAFo/o4eUiqnVv24/DSC04180.JPG
