• Ground Markers Aid in Procurement and Interpretation of Large-Scale 70 MM Aerial Photography

      Francis, Richard E. (Society for Range Management, 1970-01-01)
      Butcher paper, surveyor stakes, lath strips, plastic letter-number codes, paper plates, and drop-panel markers were all useful for marking range ground features, providing strict flight-line control, and interpreting resultant aerial photographs. All markers were both highly detectable and resolvable at the largest scale of 1:600. All markers remained visible, yet some became less resolvable, at the smaller scales of 1:2400 and 1:4600.