usc gs vertical datums

At what stage of product development does datum documentation need to be incorporated? In an improved system during the second year, each datum was assigned a specific code name which was stamped onto the bench mark in addition to the elevation. The datum was defined by the observed heights of mean sea level at the 26 tide gauges and by the set of elevations of all bench marks resulting from the adjustment of observations. Jerry Penry is a licensed land surveyor in Nebraska and South Dakota. Place the documentation in a USGS publication series information product according to the following criteria.

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