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Table 2.1 NATIONAL OCEAN SURVEY, U.S. COAST, AND GE STANDARDS OF ACCURACY, AND GENERAL SPECIFICATION

Table 2.1 NATIONAL OCEAN SURVEY, U.S. COAST, AND GE STANDARDS OF ACCURACY, AND GENERAL SPECIFICATION

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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5mm ERROR FIGURE 2.1 Leveling concepts. AT WHAT ORDER OF SURVEY THE RESULTS Table 2.1 NATIONAL OCEAN SURVEY, U.S. COAST, AND GEODETIC SURVEYS: CLASSIFICATION, QUALIFY? STANDARDS OF ACCURACY, AND GENERAL SPECIFICATIONS FOR VERTICAL CONTROL Classification Principal uses Minimum standards; higher accuracies may be used for special Maximum closures* Section: forward and backward Loop or line First Order Class I, Class II Basic framework of the National Network and of metropolitan area control Extensive engineering projects Regional crustal movement investigations Determining geopotential values Class I Second Order Class II Secondary control of the National Network and of metropolitan area control Large engineering projects Local crustal movement and subsidence investigations Support for e lower-order control 6mm VK 930 Colle 6mm VK MSL = 0.000 ft (m) 700M LOOP DISTANCE Control densification, usually adjusted to the National Network 8 mm VK 3 mm VK (Class I) 4 mm VK (Class II) 4 mm VK (Class I) 5 mm VK (Class II) *Check between forward and backward runnings where K is the distance in kilometers. Third Order Local engineeringug projects Topographic mapping Studies of rapid topographic subsidence mapping Support for local ug Drainage studies surveys and gradient establishment in mountainous areas 8 mm VK S Miscellaneous local control; may not be adjusted to the National Network Small engineering projects Small-scale CE 12mm VK 12mm VK
Transcribed Image Text:5mm ERROR FIGURE 2.1 Leveling concepts. AT WHAT ORDER OF SURVEY THE RESULTS Table 2.1 NATIONAL OCEAN SURVEY, U.S. COAST, AND GEODETIC SURVEYS: CLASSIFICATION, QUALIFY? STANDARDS OF ACCURACY, AND GENERAL SPECIFICATIONS FOR VERTICAL CONTROL Classification Principal uses Minimum standards; higher accuracies may be used for special Maximum closures* Section: forward and backward Loop or line First Order Class I, Class II Basic framework of the National Network and of metropolitan area control Extensive engineering projects Regional crustal movement investigations Determining geopotential values Class I Second Order Class II Secondary control of the National Network and of metropolitan area control Large engineering projects Local crustal movement and subsidence investigations Support for e lower-order control 6mm VK 930 Colle 6mm VK MSL = 0.000 ft (m) 700M LOOP DISTANCE Control densification, usually adjusted to the National Network 8 mm VK 3 mm VK (Class I) 4 mm VK (Class II) 4 mm VK (Class I) 5 mm VK (Class II) *Check between forward and backward runnings where K is the distance in kilometers. Third Order Local engineeringug projects Topographic mapping Studies of rapid topographic subsidence mapping Support for local ug Drainage studies surveys and gradient establishment in mountainous areas 8 mm VK S Miscellaneous local control; may not be adjusted to the National Network Small engineering projects Small-scale CE 12mm VK 12mm VK
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