If you fly over certain parts of the US, you can look down and see massive “barcodes” spread throughout the land. Most of the barcodes are about 78′ wide and 53′ long, and their origin dates back to the late 1950s. Here’s how they got there — and what they’re used for.

Follow Tech Insider: On Facebook

Join the conversation about this story »

Source: http://www.thisisinsider.com/us-giant-barcodes-aerial-calibration-targets-2017-6

Advertisements