DMC 2010-13 specifies the use of what method for verifying the accuracy of GPS data?

Prepare for the DMC Administrative Order Test No. 2007-29. Use flashcards, interactive quizzes, and detailed explanations for each question to enhance your understanding. Master the content with our comprehensive practice material and succeed!

Verifying GPS data accuracy is best done by adjusting the measurements against known reference points. In this approach, GPS data are tied to benchmarks with precisely established coordinates, and a geodetic adjustment (often a least-squares adjustment) is performed to distribute any errors across the network. This yields coordinates that are mathematically most probable given the observations and their weights, and it propagates uncertainties to provide a coherent, consistent set of positions. Anchoring the data to these known benchmarks helps reveal and correct systematic errors, such as biases or instrument drift, and ensures the network aligns with the established datum.

This method is preferred because it uses solid ground-truth references and provides a formal, quantitative assessment of accuracy. Manual re-measurement is time-consuming and may still miss errors; cross-referencing with satellite imagery does not give precise ground coordinates; and comparing with old survey data can be unreliable due to changes, datum differences, or outdated information.