用谷歌地球捕捉到的: 神秘的条形码散落在美国的领土内

Captured On Google Earth: Mysterious Barcode Patterns Strewn Across U.S. Land
Spotted near airforce bases, these curious painted asphalt patterns are Cold War artifacts.

Across empty stretches of the United States, an odd Cold War artifact persists. It is a series of asphalt rectangles coated in patterns of black and white paint. Based on the 1951 U.S. Air Force resolution test chart, the barcode-like patterns were used to test the ability and resolution of film cameras carried by airplanes.
The pattern was adopted as a uniform way for the Air Force to test cameras in 1959, and has been updated several times. In 1998, after almost 50 years in use, a military code manual deemed the pattern an outdated standard for new cameras parts and insisted that it only be used as a way to test replacement camera equipment. In 2006, after 57 years as the standard for Air Force cameras, the test pattern was retired; non-film cameras had become more common, and the tri-bar didn't adapt well to digital photography.



用谷歌地球捕捉到的: 神秘的条形码散落在美国的领土内
这些图案是在临近的空军基地观察到的, 这些奇怪的沥青图案其实是冷战留下的文物.

跨越纵横交错的美国, 一个奇怪的冷战神器仍然存在. 那是一系列黑白交错的, 裹着黑白颜料的矩形沥青图案. 这些图案是基于美国空军1951年的空军分辨率测试图制作出来的, 这些像条形码一样的图案被用作测试飞机上胶片照相机的分辨率.
这些图案被空军在1959年采用作为测试照相机的统一方式, 而且已经更新数次. 在1998年, 将近其50年的使用时间之后, 一本军事代码手册上指出, 这个办法已经成为过时的标准, 而这只能作为一个替代的方法来测试照相设备. 在2006年, 经过57年的空军相机标准，测试图案已然要退休了. 因为不用胶卷的数码相机已经变得普遍起来, 而这些小条格已经不再很好的适用于数码摄影了.

英文来源: POPSCI科技新闻

Captured On Google Earth: Mysterious Barcode Patterns Strewn Across U.S. Land
Spotted near airforce bases, these curious painted asphalt patterns are Cold War artifacts.

Across empty stretches of the United States, an odd Cold War artifact persists. It is a series of asphalt rectangles coated in patterns of black and white paint. Based on the 1951 U.S. Air Force resolution test chart, the barcode-like patterns were used to test the ability and resolution of film cameras carried by airplanes.
The pattern was adopted as a uniform way for the Air Force to test cameras in 1959, and has been updated several times. In 1998, after almost 50 years in use, a military code manual deemed the pattern an outdated standard for new cameras parts and insisted that it only be used as a way to test replacement camera equipment. In 2006, after 57 years as the standard for Air Force cameras, the test pattern was retired; non-film cameras had become more common, and the tri-bar didn't adapt well to digital photography.



用谷歌地球捕捉到的: 神秘的条形码散落在美国的领土内
这些图案是在临近的空军基地观察到的, 这些奇怪的沥青图案其实是冷战留下的文物.

跨越纵横交错的美国, 一个奇怪的冷战神器仍然存在. 那是一系列黑白交错的, 裹着黑白颜料的矩形沥青图案. 这些图案是基于美国空军1951年的空军分辨率测试图制作出来的, 这些像条形码一样的图案被用作测试飞机上胶片照相机的分辨率.
这些图案被空军在1959年采用作为测试照相机的统一方式, 而且已经更新数次. 在1998年, 将近其50年的使用时间之后, 一本军事代码手册上指出, 这个办法已经成为过时的标准, 而这只能作为一个替代的方法来测试照相设备. 在2006年, 经过57年的空军相机标准，测试图案已然要退休了. 因为不用胶卷的数码相机已经变得普遍起来, 而这些小条格已经不再很好的适用于数码摄影了.

英文来源: POPSCI科技新闻