Benchmark

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.