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I understand that it was IP geolocation, but my question was how the JPG was being dynamically created with the new information. However, I googled a bit this morning for "dynamic JPG" and found out there's quite a few ways to do it. The easiest, it seems, is relying on UNIX's ability to send a cgi program under whatever name it wants. When you type the .jpg, that filename is actually calling a CGI program which generates the JPG and returns a JPG MIME type to the browser. It's not actually an address of the file, but a function call. Kinda neat.
At least thats how I understood it.
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"I'm typing on a computer of science, which is being sent by science wires to a little science server where you can access it. I'm not typing on a computer of philosophy or religion or whatever other thing you think can be used to understand the universe because they're a poor substitute in the role of understanding the universe which exists independent from ourselves." - Willravel
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