Which combination yields a maximum triangle closure of 5 arcseconds for third-order geodetic control?

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Study for the Geodesy Refresher Exam. Prepare with multiple choice questions, hints, and explanations. Ace your exam with confidence!

Multiple Choice

Which combination yields a maximum triangle closure of 5 arcseconds for third-order geodetic control?

Explanation:
Triangle closure error shows how well a closed triangle of control points fits the measured network, and the allowed misclosure is tied to the accuracy category. For third-order geodetic control there are two classes: class I is the tighter, and class II is the looser. The 5 arcsecond limit corresponds to the looser third-order class II. So the combination that yields a maximum triangle closure of 5 arcseconds is third-order, class II. The other orders and classes have different allowed misclosures, so they wouldn’t match the 5 arcsecond limit.

Triangle closure error shows how well a closed triangle of control points fits the measured network, and the allowed misclosure is tied to the accuracy category. For third-order geodetic control there are two classes: class I is the tighter, and class II is the looser. The 5 arcsecond limit corresponds to the looser third-order class II. So the combination that yields a maximum triangle closure of 5 arcseconds is third-order, class II. The other orders and classes have different allowed misclosures, so they wouldn’t match the 5 arcsecond limit.

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