What is the baseline length specified for the 1st Order of the Primary Geodetic Network?

• A. 50 kilometers
• B. 25 kilometers
• C. 5 kilometers
• D. 2 kilometers

Answer: (A)

Baseline length in a geodetic network is about how far apart primary control points can be while still meeting the precision requirements for that order. For the 1st Order Primary Geodetic Network, the standard maximum distance between connected primary points is 50 kilometers. This distance allows wide-reaching control while keeping angular measurements and error propagation within the tight tolerances needed for a first-order network, using precise instruments and proper observational techniques. The other options reflect shorter baselines typical of lower-order networks, but they do not match the specification for the 1st Order. Therefore, the specified baseline length is 50 kilometers.