Table 2: Stationary positioning accuracy of GPS.

FromToCalculated distance (m)Actual distance (m)Error (m) Proportional error

B1B227.1210.00−17.12171.16%
B2B37.4710.002.5325.25%
B3B46.5710.003.4334.35%
B4B123.1430.006.8622.86%
W1W321.8520.00−1.859.25%
W1W430.2230.00−0.220.74%
W3W216.2610.00−6.2662.57%
W4W130.2230.00−0.220.74%
R1R210.8810.00−0.888.83%
R2R313.4810.00−3.4834.84%
R3R426.9910.00−16.99169.90%
R4R131.2830.00−1.284.27%
R4R310.9010.00−0.909.04%