But does that work for JPEGs as well as GIFs? I remember writing an image map program in TK and had to physically open a JPEG, and do a bit of unpacking magic on some of the first 9 bytes of the file to get the file dimensions. Granted this was years ago and maybe the module has been updated but as I recall, I tried that and it wouldn't handle the JPEGs.

Update: Realized the OP was asking about remote images not local.