Which one of the following specifications for length of base line refers to Third Order Triangulation system ?

Which one of the following specifications for length of base line refe

1.	Which one of the following specifications for length of base line refers to Third Order Triangulation system ?
A.	0.5 to 3 km
B.	1.5 to 4 km
C.	5 to 15 km
D.	10 to 20 km
Answer» B. 1.5 to 4 km

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Which one of the following specifications for length of base line refers to Third Order Triangulation system ?

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