This command takes a measurement to a benchmark point with a known elevation in order to calculate the elevation at the occupied point. This command only applies to total stations.
In the Benchmark dialog, fill in the instrument and rod heights.
The benchmark elevation is specified in the Target Elevation field.
This field can be filled out by entering a target point number
which reads the elevation from the current coordinate file for the
specified point. Or you can simply type in the target elevation
directly. There is a choice between calculating the occupied point
elevation or the instrument height. For calculating the instrument
height, you need to enter the occupied point elevation. When
calculating the occupied point elevation, there is an option to
store this elevation to the coordinate file for the occupied point
number. When all the options are set and the target benchmark is
sighted, pick the Read button to take a measurement. After the
reading, the program will display in the dialog the calculated
occupied point elevation or instrument height depending on the
calculation mode.