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Table 1 Subject distances for different combinations of the subject height and the FOV

From: Visualization of CCTV coverage in public building space using BIM technology

FOV Subject height
10% 25% 50% 100%
10° 77.72 38.86 19.43 9.715
35° 21.56 10.78 5.39 2.695
50° 14.6 7.3 3.65 1.825
60° 11.76 5.88 2.94 1.47
95° 6.24 3.12 1.56 0.78
99° 5.8 2.9 1.45 0.725
  1. (Unit: meter).