STAR*NET V6 - Circe

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Chapter 10 Adjustments in Grid Coordinate Systems This optional listing for grid adjustments shows computed convergence angles and grid factors (scale, elevation and combined) for every station in the network. Average project values are also listed at the end of the table. Convergence Angles (DMS) and Grid Factors at Stations ===================================================== (Grid Azimuth = Geodetic Azimuth – Convergence) (Elev Factor Includes a -30.50 M Geoid Height Correction) Convergence ------- Factors ------- Station Angle Scale x Elevation = Combined 1 0-30-16.53 1.00004201 0.99996555 1.00000756 6 0-37-07.56 1.00004798 0.99996523 1.00001351 2 0-32-41.20 1.00004232 0.99996233 1.00000487 3 0-32-47.67 1.00005166 0.99996538 1.00001700 4 0-35-14.76 1.00004954 0.99997002 1.00001956 Proj Ave: 0-34-22.15 1.00004628 0.99996567 1.00001184 Convergence and Combined Grid Factors And finally, this listing section contains, the adjusted grid coordinates with elevations, and the adjusted latitudes and longitudes with ellipse heights. These two parts are each optional and are selected by settings in the Project Options. Adjusted Station Information ============================ Adjusted Coordinates (Meters) Station N E Elev Description 1 61367.0060 660318.6260 1244.5300 6 58949.0873 673994.0150 1324.7786 2 61276.1121 665123.5876 1240.3974 3 57323.2277 665376.0984 1379.5684 Adjusted Positions and Ellipsoid Heights (Meters) (Average Geoid Height = -30.500 Meters) Station Latitude Longitude Ellip Ht 1 42-33-00.011496 89-15-56.245898 1214.0300 6 42-31-37.314471 89-05-58.042921 1294.2786 2 42-32-55.640147 89-12-25.695430 1209.8974 3 42-30-47.468871 89-12-16.281481 1349.0684 Adjusted Station Information 154
Chapter 10 Adjustments in Grid Coordinate Systems 10.12 Defining “Custom” Grid Zones Parameters for Custom zones are stored in a text file named STAR6.CUS located in the same directory you installed STAR*NET. It contains ellipsoid parameters, custom grid zone parameters, and optional custom linear units information. A listing of the supplied file is shown later in this section. This file is a standard text file, and using any text editor, you can view it or modify its contents to add ellipsoids, grid zone parameters or linear unit definitions as needed. When running STAR*NET, this information becomes available in the Project Options/Adjustment dialog. Below are descriptions of the three sections in the STAR6.CUS file. While reviewing these descriptions, refer to the listing of the supplied file. Ellipsoids This section contains a list of ellipsoids available for custom grid zones and UTM. Most standard ellipsoids used internationally are supplied in the file, but you can edit-in other special ellipsoids whenever required. A data line defining an ellipsoid begins with the “E” character. As an example, we’ve supplied a special non-standard ellipsoid “Airy Modified” as the second ellipsoid in the list. (It’s actually used in Ireland.) An ellipsoid name may contain up to 18 characters including internal blanks, and is terminated by a “:” colon character. Note that even though ellipsoids for the United States NAD grid systems are included in this list, when using NAD27 and NAD83 the program uses built-in ellipsoidal constants for these zones so they can’t be inadvertently changed by editing this file. Custom Grid Zone Parameters This section contains parameters for any custom zones defined. Projections currently supported by STAR*NET are Transverse Mercator, Lambert and Hotine. A few custom zones which illustrate parameters required for the different projections are already included in the file, and of course you can edit-in custom zones required for your own geographical area. Parameter lines defining Transverse Mercator zones begin with a “T” character; Lambert, with an “L” or “B” character; and Hotine, with an “H” character. See the attached listing of the STAR6.CUS file for data items required for each kind of line. Note that you can enter Lambert parameters using two methods. The “L” code allows entry of a single parallel and the scale factor on that parallel, the method normally used internationally. The “B” code allows entry of two standard parallels, the method used in the United States and sometimes elsewhere. The zone illustrating the “B” code file shown in the sample STAR6.CUS listing actually includes the same parameters used for the definition of NAD83 California Zone 0403. 155
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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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Chapter 5 Preparing Input Data 102
Page 110 and 111: Chapter 6 Running Adjustments The S
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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 146 and 147: Chapter 9 Tools As discussed above,
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Page 170 and 171: Appendix A STAR*NET Tutorial Exampl
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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
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Page 202 and 203: Appendix D Error and Warning Messag
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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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