MERGING DATA SETS OF SEPARATE ORIGIN. DATUMS (Horizontal, Vertical, 3D) CONVERSION TECHNIQUES CONTROL DATA vs. MAPPING DATA ORIGINAL INTENT DATA ACQUISITION METHODOLOGY (Equipment & Procedure) CURRENT WORK (CERP, Others). HORIZONAL DATUMS MERGING DATA SETS.
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Today: Surveyors can do sub-cm spirit leveling over lines up to 10 km long
Tomorrow: Surveyors expect to do 100+ km lines at similar accuracy with GPS and geoid (“GPS leveling”)