What is the length of the First Order Accuracy Survey Control Monument?

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!

Multiple Choice

What is the length of the First Order Accuracy Survey Control Monument?

The idea behind this standard is to have a dependable, clearly visible reference marker that remains stable over time for high-precision work. A First Order Accuracy Survey Control Monument is designed to be tall and robust enough to be easily sighted and measured with surveying instruments, while part of it is embedded to keep it stable in the ground. A length of 120 cm (1.2 meters) above the ground provides a consistent reference point that reduces parallax and reading errors, accommodates instrument setups at typical working heights, and resists disturbance by weather or soil. Shorter monuments tend to be less visible and more prone to tilting or damage, which compromises accuracy. So the standard 120 cm length is chosen to maximize durability, visibility, and measurement reliability.

The idea behind this standard is to have a dependable, clearly visible reference marker that remains stable over time for high-precision work. A First Order Accuracy Survey Control Monument is designed to be tall and robust enough to be easily sighted and measured with surveying instruments, while part of it is embedded to keep it stable in the ground. A length of 120 cm (1.2 meters) above the ground provides a consistent reference point that reduces parallax and reading errors, accommodates instrument setups at typical working heights, and resists disturbance by weather or soil. Shorter monuments tend to be less visible and more prone to tilting or damage, which compromises accuracy. So the standard 120 cm length is chosen to maximize durability, visibility, and measurement reliability.

More practice questions