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STAR*NET V6 - Circe

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Chapter 8 ANALYSIS OF ADJUSTMENT OUTPUT<br />

8.1 Overview<br />

Your objectives in performing a Least Squares Survey Adjustment are to eliminate<br />

blunders from your data, compute the best fit adjustment for all survey observations<br />

simultaneously, and to evaluate the accuracies of the adjusted survey points.<br />

This chapter is designed to help you interpret a <strong>STAR*NET</strong> adjustment output listing.<br />

You can use the output listing to :<br />

Review all of your input field observations<br />

Locate and correct gross blunders in your input data<br />

Analyze the strength of your survey observations<br />

Determine the positional accuracies of computed points<br />

<strong>STAR*NET</strong> stores the output from an adjustment in a file called “PROJECT.LST”,<br />

where “PROJECT” is the name of your current project. You can view this file within the<br />

program by choosing Output>Listing, or by pressing the Listing tool button.<br />

You control the sections that <strong>STAR*NET</strong> places in the output listing file by settings in<br />

the Project Options/Listing dialog. During the data checking phase, you may want to<br />

produce a minimally detailed listing, and then later, turn on additional sections of the<br />

report you now want included.<br />

8.2 Sections of the Output Listing<br />

Summary of Files Used and Options Settings<br />

Listing of Input Data Files (optional)<br />

Adjustment Solution Iterations (optional)<br />

Summary of Unadjusted Input Observations (optional)<br />

Adjustment Statistical Summary<br />

Adjusted Station Information (optional)<br />

Coordinate Changes from Entered Provisionals (optional)<br />

Adjusted Observations and Residuals (optional)<br />

Adjusted Bearings and Horizontal Distances (optional)<br />

Convergence & Grid Factors at each Station (for grid jobs, optional)<br />

Traverse Closures of Unadjusted Observations (optional)<br />

Sideshot Coordinates Computed After Adjustment (optional)<br />

Error Propagation Results (optional)<br />

The remainder of this chapter discusses each section of the output listing file, providing<br />

hints on adjustment analysis. It concludes with a section of procedures that you can<br />

follow to locate and correct errors in your survey data.<br />

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