STAR*NET V6 - Circe

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Chapter 10 Adjustments in Grid Coordinate Systems 10.10 Entering Data for Grid System Adjustments Remember that in a “Grid” coordinate system adjustment, you are normally supplying field observations in a ground-surface system that will be reduced to fit your supplied coordinates, which are in a grid system. All station coordinates must be supplied as grid values in the form of either coordinates or geodetic positions (latitudes and longitudes). You cannot combine “grid” and arbitrary “local” coordinates in the same adjustment. Input data for a grid coordinate system adjustment is prepared and entered the same way as for a local coordinate system, except for the following differences: 1. Entered station coordinates must be grid coordinates or geodetic positions. 2. Entered station heights are normally supplied as orthometric elevations. Although ellipsoid heights may be entered, the “standard” <strong>STAR*NET</strong> edition is designed to handle “terrestrial” adjustments using elevation-based observations. In the “Professional” <strong>STAR*NET</strong> edition, however, station heights are sometimes supplied as ellipsoid heights because of the GPS vector handling facilities. To derive orthometric elevations from these ellipsoid heights, accurate geoid heights are provided for every station, or geoid modeling is performed. 3. By default, bearings or azimuths are entered as grid values. But if you want to enter geodetic (or observed) bearings or azimuths, use the “.MEASURED” inline option to change the input mode. The program internally converts these values to grid by computing and applying proper corrections. 4. By default, all other input data, the angle and distance observations, are entered as observed surface measurements. These observations are internally reduced to the grid plane values during the adjustment. But if you want to enter angle and distance values that have already been reduced to grid (information taken from a map for example), use the “.GRID” inline option to change the input mode. Corrections will not be computed for these values. Descriptions of the “.MEASURED” and “.GRID” inline option data modes mentioned above are fully detailed in Chapter 4, “Options” on page 85. 152
Chapter 10 Adjustments in Grid Coordinate Systems 10.11 Additional Listing Sections for Grid Adjustments As discussed in Chapter 8, “Analysis of Adjustment Output”, several additional or altered parts to the listing file are generated when you run a grid adjustment. As shown in the following example, the Summary of Unadjusted Input Observations listing reflects the t-T differences for angles and the combined scale factors for distances. Summary of Unadjusted Input Observations ======================================== Number of Measured Geodetic Angle Observations (DMS) = 6 At From To Obs Angle StdErr t-T 1 27 2 90-44-18.31 2.00 -1.14 2 1 3 265-15-55.29 2.00 -1.20 3 2 4 82-48-26.91 2.00 -1.26 4 3 5 105-03-08.64 2.00 -1.28 Number of Measured Distance Observations (FeetUS) = 5 From To Obs Dist StdErr Comb Grid 1 2 4805.4680 0.030 1.0000077 2 3 3963.6940 0.030 1.0000125 3 4 4966.0830 0.030 1.0000161 4 5 3501.2230 0.030 1.0000110 Unadjusted Observations (2D Format) The listing that shows adjusted azimuths and horizontal distances, now displays grid azimuths as well as adjusted distances for both grid and ground. Adjusted Azimuths (DMS) and Horizontal Distances (FeetUS) ========================================================= (Relative Confidence of Azimuth is in Seconds) From To Grid Azimuth Grid Dist 95% RelConfidence Grnd Dist Azi Dist PPM 1 2 91-04-51.60 4805.7540 12.33 0.0961 19.9968 4805.7169 2 3 176-20-40.57 3963.8439 11.48 0.1590 40.1130 3963.7943 3 4 79-09-21.79 4966.3902 9.41 0.1492 37.6402 4966.3100 4 5 4-12-30.82 3501.1951 15.62 0.1273 25.6323 3501.1567 Adjusted Azimuths and Horizontal Distances 153
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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 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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INLINE OPTION: .DELTA ON/OFF Chapte
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INLINE OPTION: .SCALE Value Chapter
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Chapter 5 Preparing Input Data INLI
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Chapter 5 Preparing Input Data Lega
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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
Page 124 and 125: Chapter 8 Analysis of Adjustment Ou
Page 144 and 145: To run the utility, follow these st
Page 146 and 147: Chapter 9 Tools As discussed above,
Page 148 and 149: Chapter 9 Tools A few words should
Page 150 and 151: Chapter 9 Tools The settings select
Page 152 and 153: Chapter 10 Adjustments in Grid Coor
Page 168 and 169: APPENDIX A - TOUR OF THE STAR*NET P
Page 170 and 171: Appendix A STAR*NET Tutorial Exampl
Page 172 and 173: Appendix A STAR*NET Tutorial 4. Rev
Page 174 and 175: Appendix A STAR*NET Tutorial 7. Fin
Page 176 and 177: Appendix A STAR*NET Tutorial 12. To
Page 178 and 179: Appendix A STAR*NET Tutorial Take a
Page 186 and 187: Appendix A STAR*NET Tutorial Before
Page 188 and 189: Example 5: Resection Appendix A STA
Page 192 and 193: Example 7: Preanalysis Appendix A S
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Page 196 and 197: Appendix B References 6. Mikhail, E
Page 198 and 199: Appendix C Additional Technical Inf
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Page 202 and 203: 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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