STAR*NET V6 - Circe

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Chapter 8 Analysis of Adjustment Output 8.14 Sideshot Coordinates Computed After Adjustment (Optional) If you have included sideshots (lines beginning with the “SS” code) in your data, you can choose to include this section in your listing file. Since sideshot coordinates will be written to the final adjusted coordinates file you may wish not to include them in your listing file to make it shorter in length. Sideshot Coordinates Computed After Adjustment ============================================== Station N E Elev Description A33 916.1707 1119.6084 1437.8623 TOE A34 1083.4697 1084.2969 1441.7944 TOE X45 1253.9746 1000.2647 1448.8716 CURB FACE 5014 1383.7721 1002.1117 1449.9628 TOE 5023 1403.7304 1008.6017 1452.9255 SHLD 5027 1225.1863 1015.3395 1447.9965 SHLD Computed Sideshot Coordinates (3D Example) 8.15 Error Propagation Results (Optional) If you chose to have error propagation performed when you ran your adjustment, you can optionally include any or all of the next three report sections in your listing file. The first section of the error propagation listing shows the adjusted station coordinate standard deviations. Standard deviations represent the amount of uncertainty in the computed coordinates at a “one-sigma” (approximately 67%) level. Fixed stations are always shown with zero standard deviations. Error Propagation ================= Station Coordinate Standard Deviations (FeetUS) Station N E Elev 1 0.00000 0.00000 0.00000 2 0.02319 0.02023 0.03812 3 0.02678 0.02217 0.03832 5 0.04556 0.01244 0.02334 104 0.03451 0.02435 0.01425 105 0.04115 0.04251 0.03662 Station Standard Deviations (3D Example) 130
Chapter 8 Analysis of Adjustment Output The next section shows the error ellipses and elevation confidences computed using the confidence level you chose in the project options. The error ellipse parameters define the shape and size of the confidence region around each station. In the output below, for example, you can say with 95% certainty the adjusted station lies somewhere within the ellipse region. Station Coordinate Error Ellipses (FeetUS) Confidence Region = 95% Station Semi-Major Semi-Minor Azimuth of Elev Axis Axis Major Axis 1 0.00000 0.00000 0-00 0.00000 2 0.05980 0.04579 29-17 0.07472 3 0.06722 0.05219 159-23 0.07510 Station Error Ellipses (3D Example) If the adjustment passes the Chi Square test, the adjusted coordinate standard deviations are used to compute the error ellipses directly. However, if the adjustment fails the Chi Square test, the standard deviations are increased by the computed Total Error Factor, to reflect the weak adjustment. This is done to protect you from generating artificially small ellipses by reducing your global observation standard errors to the point where the adjustment is no longer valid. The last section resulting from error propagation shows relative ellipses and a vertical difference confidence. By default, relative error ellipse information is computed between each station connected by an observation. Alternately, the “.RELATIVE” inline options can be used to control exactly which ellipses to compute. Relative ellipses provide an estimate of the accuracy of the relative positions of two stations. Two stations can have large error ellipses but a small relative ellipse between them, if their positions are highly correlated. Note that relative ellipses are also inflated by the Total Error Factor if the adjustment fails the Chi Square test. For detailed information on ellipse and relative ellipse interpretation see the next section. Relative Error Ellipses Confidence Region = 95% Stations Semi-Major Semi-Minor Azimuth of Vertical From To Axis Axis Major Axis 2 13 0.06135 0.03833 63-47 0.06248 4 15 0.07709 0.05626 54-01 0.09281 2 19 0.07856 0.06761 170-50 0.04554 Relative Error Ellipses (3D Example) 131
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STAR*NET V6 Least Squares Survey Ad
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TABLE OF CONTENTS Chapter 1 OVERVIE
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10.9 Entering a Geoid Height and Ve
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Chapter 1 Overview 4. Survey planni
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Chapter 2 Installation 2.3 Starting
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2.7 The Registry Chapter 2 Installa
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3.3 The Menu System Chapter 3 Using
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3.8 Checking the Error File Chapter
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Chapter 3 Using STAR*NET 3.12 Displ
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Chapter 4 Options 4.2 Changing Proj
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Option Group: Units Chapter 4 Optio
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General Options Chapter 4 Options T
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Chapter 4 Options Option Group: Dis
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Chapter 4 Options What standard err
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Chapter 4 Options The default metho
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Option Group: Adjusted Contents Cha
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Other Files Options Chapter 4 Optio
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Chapter 4 Options Creating a Ground
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Special Options Chapter 4 Options T
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4.5 Company Options Chapter 4 Optio
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Chapter 4 Options Note that any dat
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Chapter 4 Options When the Instrume
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Using the Input Data Files Dialog C
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Chapter 5 Preparing Input Data 5.5
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Station Names Chapter 5 Preparing I
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Chapter 5 Preparing Input Data Zeni
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Point Descriptors Chapter 5 Prepari
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Example 1: (2D Data) Chapter 5 Prep
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Chapter 5 Preparing Input Data The
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Chapter 5 Preparing Input Data SING
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The “V” Code: Vertical Observat
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Chapter 5 Preparing Input Data Samp
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Example 2: (2D Data) Chapter 5 Prep
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Chapter 5 Preparing Input Data The
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Chapter 5 Preparing Input Data TRAV
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Chapter 5 Preparing Input Data Exam
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The “TE” Code: Ending a Travers
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Chapter 5 Preparing Input Data LEVE
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Chapter 5 Preparing Input Data SIDE
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Chapter 5 Preparing Input Data Usin
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Page 106 and 107: How do I weight observations? Chapt
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Page 110 and 111: Chapter 6 Running Adjustments The S
Page 112 and 113: 6.5 Preanalysis Chapter 6 Running A
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Page 116 and 117: Chapter 7 Viewing and Printing Outp
Page 118 and 119: 7.4 Viewing the Error File Chapter
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Page 144 and 145: To run the utility, follow these st
Page 146 and 147: Chapter 9 Tools As discussed above,
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Page 152 and 153: Chapter 10 Adjustments in Grid Coor
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Page 178 and 179: Appendix A STAR*NET Tutorial Take a
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Appendix A STAR*NET Tutorial Before
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Example 5: Resection Appendix A STA
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Appendix A STAR*NET Tutorial Exampl
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Example 7: Preanalysis Appendix A S
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Appendix B References 6. Mikhail, E
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Appendix C Additional Technical Inf
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Appendix C Additional Technical Inf
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Appendix D Error and Warning Messag
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Data Lines, General Content Data Ty
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Index Installation Installing, 3 Se
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STARPLUS SOFTWARE, INC.
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STAR*NET V6 - Circe

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