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Example: Changing the Datum Elevation of PointsYou commonly change the datum elevation to adjust the points based on the actual elevation of a benchmark that was assumed in the field. For example, to adjust for the 1045.67 benchmark elevation that was assumed to be 100 in the field, use the Reference option, as shown in the following prompts: Change in elevation<or Reference>: ROld datum elevation: 100New datum elevation: 1045.67The following example shows how you can also achieve the same result by calculating the change in elevation and entering it directly. Change in elevation<or Reference>: 945.67