That reminds me of when I still did land surveying. I remember getting assigned to paint aerial targets for an aerial survey. Basically you need these giant, fairly precise, icons painted on the ground. A plan then flies over the area and uses paralax calculation and GPS correlation to fix the precise coordinates and elevation of each target.
It turns out that the best surface for aerial targets is pavement because it is high contrast (especially with white paint) and uniform. Also it is flat and makes a good painting surface. So we drove out to the area in question, parked the truck with its flashers on, and put on reflective vests. Then one guy would direct traffic around one lane of traffic while the other walked out and started painting lines in the middle of the road.
I don't think a single person asked us what we were doing. Not even the one or two police officers that drove by.
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It turns out that the best surface for aerial targets is pavement because it is high contrast (especially with white paint) and uniform. Also it is flat and makes a good painting surface. So we drove out to the area in question, parked the truck with its flashers on, and put on reflective vests. Then one guy would direct traffic around one lane of traffic while the other walked out and started painting lines in the middle of the road.
I don't think a single person asked us what we were doing. Not even the one or two police officers that drove by.
Thomas
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