#Units Directive

Each survey file should contain one or more #Units directives -- at least one on a line prior to the first defined survey vector.  Since there are quite a few units options, most of which you'll rarely need, the #Units directive description is organized into separate topics:

#Units Directive - General Description

Overriding Default Units with Special Formats

In the following topics the slash (/) character is used to separate the alternative versions of parameters and/or their settings.  For example, "A/AB = Degrees/Mils/Grads" heads the section that describes unit assignments for both azimuths (A=...) and azimuth backsights (AB=...).  Abbreviated forms, if allowed, are indicated by using lower case for the portion that can be omitted (e.g., O=... for Order=...).

Vector Type and Column Order (CT/RECT, Order=)

Measurement Units (Feet, Meters, D=,A=, V=, S=)

Declinations and Grid Corrections (DECL=, GRID=, RECT=)

Instrument Corrections (INCA=, INCV=, etc.)

Backsight Types and Tolerances (TYPEAB=, TYPEVB=)

Saving and Restoring Units Settings (RESET, SAVE, RESTORE)

Advanced or Seldom Used Parameters  (LRUD=, CASE=, PREFIX=, TAPE=, UV=, FLAG=, NOTE=, $name=)