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BASIC
CONVERSION TECHNIQUES
1Estimation of bench mark heights by incorporating the original leveling data into NAVD 88 using
least squares adjustment
techniques
2A rigorous transformation of bench mark
heights for a particular project using datum conversion correctors estimated from the
project’s original adjustment constraints and their differences between
NAVD 88 and NGVD 29
3A simplified transformation of bench mark heights using an average bias shift for the area
(VERTCON)