How to make a gigapixel picture

These Dutch scientists, after a lunchtime bet, built the world's biggest panorama shot out of 600 single shots of Delft. I'm still trying to load it. (Updated: Got their site, but could they have picked an uglier city angle? I don't think so. Now why didn't the Parisians do this?) They had to build new tools for most of the operations, due to scale issues. No kidding. BBC NEWS Technology How to make a gigapixel picture