A base line is measured with a steel tape, it is approximately 1000 m long. Calculate the correct length of the base line at MSL when the pull at the standardization equal 15 kg. The pull applied is 23 kg. Cross sectional area of the tape is 0.0645 cm², E = 2.11x10⁶ kg/cm² Temperature Tₘand T₀ are 35°C and 15°C respectively. The difference of level between the two ends of the base line is 2.0 m, Radius of earth R = 6400 km. Elevation of base line above MSL is 1000 m, α = 12x10-⁶ /°C. Required: The correct length of the base line applying the following correction:
(i) Temperature correction
(ii) Pull correction
(iii) Slope correction
(iv) MSL correction