STAR*NET V6 - Circe

Chapter 5 Preparing Input Data
5.5 The General Content of Data Lines
This section provides a general description of data lines used in STAR*NET. Individual
types of data lines are fully discussed in “Description of Data Format and Content,” later
in this chapter.
The box below shows the elements of a data line. Items in [brackets] are optional:
Code Stations Observations [Std Errors] [HI/HT]
Data Type Codes
The first one or two characters of a line of data is a code that defines the content of the
line. For example, the line below defines a single distance observation:
D TOWER-823 132.34 0.03
Likewise, the line below defines all the 2D measurements, angle and distance, from one
point to another including optional standard errors the two observations:
M P25-12-HUB 163-43-30 197.65 4 0.03
Some lines define 2D data like the ones above, and other lines define 3D data like the
one shown below. This line includes all the measurements from one point to another. In
this line we include the optional standard error values and an HI/HT entry:
M T20-T19-T55 33-21-30 89.5 91-22-50 4 0.03 15 5.2/5.7
By default, whether a data line should be formatted as 2D or 3D data is determined by
what kind of adjustment is to be performed. Therefore, for 2D adjustments, your data
should normally be formatted as 2D data. And for 3D adjustments, your data should
normally be formatted as 3D data.
There are times, however, when you will want to enter 3D data into a 2D adjustment so
that STAR*NET can automatically do the reduction to horizontal for you. And likewise,
there are times when you will want to enter some 2D data into a 3D adjustment. There
are special “.2D” and “.3D” inline options that can be inserted directly in the data to
change the mode of the input from 2D to 3D and visa versa. These are very useful
options! See “Using Inline Options” later in this chapter for details on the use of these
inline options and others.
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