Create StarNet File

This option converts a raw data file to the Star*Net (.DAT) format. The raw data file will be preprocessed. During conversion, multiple distances and angles will be averaged and compared to the maximum ranges set in the Traverse Options dialog box. To use this option properly, you must know how Star*Net works. You should be familiar with all Star*Net codes and commands.

NOTE: This manual is not a substitute for the Star*Net manual.

Below is a sample raw data file that contains three different traverse types. This raw data file can be reduced using CG-SURVEY or written to a Star*Net file for reduction with Star*Net, both without any editing.                                                                                                                                                                                                
                                                
The coordinate formats (C code) are the same for Star*Net and CG-SURVEY; no translation is necessary.

If a comment line in the raw data file uses a valid Star*Net code or command, it will be used in its original form (as with coordinates); not as a comment. These codes are #, C, A, D, V, B, M, TB, T, TE, SS (followed by a space) and all dot commands. (example: .CURVE, .SCALE, etc...)

Multiplication factors are converted to the .Scale command. The original multiplication factor set in the Global Options dialog box will be placed at the beginning of the Star*Net file. Other multiplication factors will be placed as they occur in the raw data file.

NOTE: You cannot use a multiplication factor for meter/feet conversion in a 3-D traverse in Star*Net 3.2.

Reference bearings/azimuths are converted to the B format.

All traverse points are converted to the M format and side shots to the SS format. Only points used once (as a foresight point) will be considered a side shot. If a point is located from more than one instrument setup, or is used as an instrument point or backsight point, the point will be converted to a M format

The LT, ET, OT, FT and CT codes are converted to comments. Point codes are combined with descriptions.

If Elevations are on, the Star*Net file must be adjusted as a 3-D traverse. The following could occur:

If you input slope distances and vertical angles, all distances will first be reduced to their horizontal/vertical components. Multiple distances will be averaged and then a slope distance and vertical angle will be recomputed from the averaged horizontal/ vertical components. This is done so Star*Net can compute corrections for curvature and refraction and vertical divergence (can only be done if vertical angles are used in a 3-D traverse.) A “.Delta Off” command will be placed in the Star*Net file.

If Curvature and Refraction is on in the Options/Global Options dialog box, a Curve command will be placed in the Star*Net file.

If you input horizontal and vertical distances, a “.Delta On" command will be placed in the Star*Net file. No corrections for curvature and refraction or vertical divergence will be possible.

If Elevations are off in the Options/Global Options dialog box, the Star*Net file must be reduced as a 2-D traverse. The following will occur:

If you input slope distances and vertical angles, all distances will be reduced to their horizontal/vertical components and the vertical components will be thrown away.
Multiple distances will be averaged.

No corrections for curvature and refraction or vertical divergence are allowed in a 2-D traverse with Star*Net version 3.2 or earlier.

Pulldown Menu Location: CGTrav
Keyboard Command:STN, CG_REDUCE_STARNET
Prerequisite: Open CG Raw file *.CGR