...Is the world, turns out.
Many of us have seen the familiar tri-bar patterns on lens test charts, like the ones based on the 1951 USAF Resolving Power Test Target you once could buy out of the back of Modern Photography magazine to tape to the wall and perform a series of fun but semi-useless tests of your lenses' sharpness. (Your photo buddy, Poindexter, was always quick to point out that he used newspaper instead, because Poindexter never "wasted money.")
Well, it turns out there are huge tri-bar patterns painted on patches of tarmac and scattered hither and yon about the country. Many are in the Mojave desert, and are believed to have been used to calibrate the lenses of spy cameras aboard things like the SR-71 Blackbird and the U-2 spyplanes in the 1950s and '60s.
You have to have a geek streak to find the post about it at the Center for Land Use Interpretation website interesting, but I did, and you might.
Die Welt ist merkwürdig.
(Thanks to Matthew Blair)
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A book of interest today:
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Featured Comments from:
Gordon: "Are there also hidden but giant brick walls for them to do distortion tests on as well?"
Mike replies: There's the great wall of China, but it always shows mustache distortion.