Converting a Drawings Coordinate System

For one reason or another drawings sometimes need to be moved from one coordinate system (datum) to another.  A classic example may be moving from a NAD 27 datum to a NAD 83.  Whatever the case may be, how might one perform this translation as accurately as possible?
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NGS to replace NAVD 88 in 2022: What GNSS users need to know : GPS World

NGS to replace NAVD 88 in 2022: What GNSS users need to know : GPS World:

'via Blog this'

Establishing Orthometric Heights Using GNSS — Part 1

Establishing Orthometric Heights Using GNSS — Part 1

AmeriSurv.com - Frames for the Future—Replacing NAVD 88--The Role of Geoid Models (Part 2 of 4)

AmeriSurv.com - Frames for the Future—Replacing NAVD 88--The Role of Geoid Models (Part 2 of 4)

Development of new geodetic infrastructure in Republic of Moldova

Development of new geodetic infrastructure in Republic of Moldova is the presentation for the EUREF symposium, which took place in Chisinau in May 2011, prepared by the MOLDPOS project working group.

I was involved in frame of this project in computation of height model for Baltic & Baltic1977 HRS for Moldova.

Accuracy of HRS/Quasigeoid for Moldova