6. What types of the height systems are commonly used in the surveying work? And what the corresponding reference datum
Posted: Fri Jul 01, 2022 7:22 am
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6. What types of the height systems are commonly used in the surveying work? And what the corresponding reference datum of these height systems? (6') 7. What is the random error? The characteristics of the random error? (7') 8. What is the topographic survey? What's the differences between topographic map and planimetric map? (7')