Kildespråk: Engelsk
control surveys are used to support project control densification,structural deformation studies,photogrammetry,dynamic positioning and navigation for hydrographic survey vessels and dredges,hydraulic study/survey location,river/floodplain cross-section location,core drilling location,environmental studies,levee overbank surveys,levee profiling,levee grading and revetment placement,disposal area construction,grade control,support for real estate surveys and regulatory enforcement actions.
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