Measurement - Vertical Angle Types

For tachymeter measurements, vertical angle types describe how an angle has been measured.

Vertical Angle type	Description
Nadir	Angle that is measured from the nadir of a plumb line to the foresight point.
Vertical	Angle that is measured from the horizon to the foresight point.
Zenith	Angle that is measured from the zenith of a plumb line to the foresight point.

You specify a default vertical angle type in the Instrument settings. See Instrument Manager.

If available, the vertical angle type is imported from the field data. For example, in a (*.RO) file, points with the key hc:2 are of type Zenith. For detailed information see description of input formats.