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1970s: Mapmakers use triangulation, in animation, a tower, in the field, and surveyors to map areas in 1973.

R

By Rick Ray

  • Stock footage ID: 26865850
Video clip length: 02:22FPS: 29.97Aspect ratio: 16:9
HD$791920 × 1080MOV1.1 GB
SD$65852 × 480MOV115 MB
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