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Tripod Data Systems SURVEY PRO User Manual

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SURVEY PRO

for Recon
GPS User's Manual
©2004 Tripod Data Systems, Inc.
All Rights Reserved

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Summary of Contents for Tripod Data Systems SURVEY PRO

  • Page 1: Survey Pro

    SURVEY PRO for Recon GPS User’s Manual ©2004 Tripod Data Systems, Inc. All Rights Reserved...
  • Page 2 TRADEMARKS Recon and Survey Pro are registered trademarks of Tripod Data Systems, Inc. Windows CE, Windows CE .NET, ActiveSync and Pocket PC are registered trademarks of Microsoft Corporation. iPAQ is a trademark of Compaq Information Technologies Group. Bluetooth and the Bluetooth symbol are registered trademarks of Bluetooth SIG Inc.

  • Page 3: Table Of Contents

    Table of Contents Table of Contents................iii Introduction ...................5 Survey Methods ..................7 RTK and Post Processing............8 Receiver Settings ..................8 RTK Settings..................... 11 Post Processing Settings ................. 12 GPS Measurements..............12 Differential GPS..................12 GPS Coordinates ..............14 Projection Mode..................14 Coordinate System Database..............
  • Page 4 Adjust with Projection – Results ............67 Projection Calculator .............. 68 Scale Factor Calculator ................68 Convergence Calculator ................. 68 Managing GPS Coordinates with TDS...........69 Survey Pro ................69 Edit Points ....................69 Import ....................... 70 ForesightDXM and TGO............72 ForesightDXM ..................72 TGO / TTC....................

  • Page 5: Introduction

    The Reference Manual contains descriptions and illustrations of every Survey Pro GPS screen. The Reference Manual is divided into sections based on the Survey Pro GPS menus. To find the description of a particular screen, simply refer to the section dealing with that...

  • Page 7: Survey Methods

    This section describes some basic concepts and terminology associated with RTK and post processing data collection, as well as the methods Survey Pro uses to calculate local coordinates from GPS measurements. In this section, you will learn: How to create receiver profiles for RTK, RTK simultaneous with...

  • Page 8: Rtk And Post Processing

    (post processed) after the field data collection is completed. Survey Pro can control GPS receivers for RTK, RTK simultaneous with post processing, and post processing only data collection. Before you can start any GPS survey, you must create a receiver profile for any receiver you will be using.
  • Page 9 Survey Methods Receiver Settings Receiver Setup 1. Go to the Job | Settings | Receiver and tap Receiver Settings to open the Receiver Setup screen. Alternatively, you can tap Create Receiver or Receiver Settings when prompted to connect to a receiver during Start GPS Survey (Page 22). 2.

  • Page 10: Bluetooth Communication

    Survey Pro GPS User’s Manual Bluetooth Communication Survey Pro can communicate wirelessly with a supported receiver using a Bluetooth connection when the following conditions are met: • A Socket™ Bluetooth Compact Flash card and its drivers are installed on the Recon data collector.

  • Page 11: Rtk Settings

    RTK Settings If you are using Survey Pro for RTK, or RTK simultaneous with post processing data collection, the following cards of the Job | Settings screen are used: •...

  • Page 12: Post Processing Settings

    Survey Pro GPS User’s Manual Post Processing Settings If you are using Survey Pro for RTK simultaneous with post processing, or post processing data collection, the Post Process card of the Job | Settings screen applies. Post Process: is where you turn on post processing data collection by specifying a Recording Interval for the receiver’s internal memory.
  • Page 13 Survey Methods survey, this starting point is the reference position the base receiver broadcasts over the data link. In a post processing survey, this starting point is specified by the user in the processing software. Differential Solutions: Types and Quality A differential GPS solution can calculated using either the GPS code data, or the GPS carrier phase wave.

  • Page 14: Gps Coordinates

    Projection Mode Survey Pro has two different modes for calculating local northing and easting from GPS measurements: Ground – TDS Localization, and Mapping Plane. Survey Pro has two different modes for calculating the vertical coordinate from GPS measured heights: Localization (+Geoid) and Ellipsoid Heights.
  • Page 15 Survey Methods adjustment is a 2D similarity transformation that shifts, scales, and rotates the default map projection’s locations (y,x) into your local coordinates (N,E). In Ground - TDS Localization mode, when you measure a distance with an EDM, the distance measured on the ground is 1:1 with the distance on the local coordinate grid.
  • Page 16 A coordinate system is un-initialized when you have no zone record set. In Ground – TDS Localization mode, this means that you have not yet configured the first RTK base position in Survey Pro. In Mapping Plane mode, this means you have not yet selected a zone record from the coordinate system database.

  • Page 17: Coordinate System Database

    Coordinate System Database Survey Pro uses a Coordinate System Database file (*.CSD) to store the map projection and datum transformation parameters for many different coordinate systems around the world. Also, horizontal and vertical localization adjustments can be stored as site records in the database.

  • Page 19: Real Time Kinematic (Rtk)

    Real Time Kinematic (RTK) RTK data collection uses differential GPS corrections broadcast by a base receiver to solve for coordinates at a rover receiver in real time. This section describes how to start a GPS survey and how to use GPS data collection and stake out.

  • Page 20: Start Gps Survey - Choose One Point Setup

    Survey wizard. You can use one point setup mode only when you have a brand new job with only one point. When you use one point setup, Survey Pro will use Ground - TDS Localization mode, and automatically solve the localization adjustment to give you ground level coordinate system with the origin at your first point.

  • Page 21: Start Gps Survey - Choose Base Setup

    RTK Data Collection Start GPS Survey - Choose Base Setup The Start GPS Survey Choose Base Setup screen is used to select how you will set your GPS base. There are three choices: • Use Current Base: This option can be used when you have already set a base station with this data collector.

  • Page 22: Start Gps Survey - Connect To Receiver

    Setup The Base Setup wizard is used to setup an RTK base receiver, and to configure the base reference position in Survey Pro. Base Setup One – Pick Point The first step of the Base Setup wizard is to pick a point for the base reference position, and measure the antenna height at the setup.
  • Page 23 GPS receiver for your first base setup. You then SET this reference position in the GPS receiver and configure the base position in Survey Pro. Note: It is strongly recommended that you use only one autonomous GPS base position in a job.
  • Page 24 6. Check the results displayed in the edit boxes. If it looks good, tap SET to start the base receiver broadcasting this reference position and GPS observations over the radio link, and to configure the base reference position in Survey Pro.

  • Page 25: Start Gps Survey - Rover Setup

    Survey Pro will be checked against the position received at the rover. If you have not yet configured the base reference position in Survey Pro, it will be configured with the position received at the rover. Note: If you have post processing data collection turned on, the...

  • Page 26: Start Gps Survey - Solve Localization

    Survey Pro GPS User’s Manual Start GPS Survey - Solve Localization The Start GPS Survey Solve Localization screen is displayed when you need a horizontal adjustment to solve your coordinate system. A horizontal adjustment is required to solve your coordinate system any time you begin a survey from an autonomous base position.

  • Page 27: Localization With Control Points

    RTK Data Collection In either horizontal mode, the procedure is the same. Starting from an autonomous GPS base setup, you measure GPS positions on control points with know local plane (N,E) coordinates. The parameters for a 2D similarity transformation are calculated with a least squares solution using the control points.
  • Page 28 Survey Pro GPS User’s Manual Localization with Control Points: Summary Take GPS measurements to at least the minimum number of control points. In Ground – TDS Localization mode, at least two horizontal control points are required. In Mapping Plane mode, at least one horizontal control point is required. In...
  • Page 29 Pro will use a modified point name in the receiver’s internal file and make a note of the modified name in the job’s .RAW file. The point name in Survey Pro is not changed. 2. Level the rover antenna over the point and tap Control Point to begin data collection.
  • Page 30 Survey Pro GPS User’s Manual that point and then: tap the H and/or V column beside that point; press H and/or V on the keyboard. Note: If your base was set up on a known point, that point is an eligible control point.
  • Page 31 RTK Data Collection will change Next> to Solve>. Tap Solve> to recalculate the solution and update the residual / misclosure display. 12. When you are happy with the solution quality, tap Next> to review the parameters. 13. Examine the scale and rotation values to verify they are reasonable.

  • Page 32: Localization Parameters Explained

    Survey Pro GPS User’s Manual 2. Enter the Scale, Rotation, Translations, and Origin of the horizontal system. 3. Enter the Slope N, Slope E, Separation, and Origin of the vertical adjustment. 4. Tap Solve> to show the horizontal and vertical parameters entered.
  • Page 33 RTK Data Collection through the origin of the localization transformation. Because most local coordinate systems are not referenced to a geodetic azimuth, any number could be a valid parameter here. Origin: is the coordinate on the intermediate mapping plane of the centroid of the control points.
  • Page 34 Survey Pro GPS User’s Manual Vertical: Slope: is the North and East tilt of the inclined plane adjustment. These values are given in parts per million, and represent the radian angle values of the deflection between the ellipsoid normal and the local gravity vector.
  • Page 35 RTK Data Collection Quality of Localization Solutions Starting from an autonomous GPS base position and solving a localization with control points is similar to starting a conventional survey from an unknown setup and solving a resection. The quality of the solution depends on both the precision of the measurements to the control points and the accuracy of the control point coordinates.
  • Page 36 Survey Pro GPS User’s Manual • Check points: after solving for localization parameters with a minimum number of control points, you should occupy an independent checkpoint to verify the solution quality. If you desire, this point can be added as a control point and used for subsequent solutions.

  • Page 37: One Point Localizations Explained

    Survey Pro solves this problem by assigning a set up group each time a new autonomous base is set. A set up group is a unique flag attached to each point record generated by GPS.
  • Page 38 Localization Calculator Note: The Localization calculator is used to provide the field procedure for a workflow supported in Survey Pro versions prior to 3.5. This routine is similar to using the Start GPS Survey wizard one point setup mode, except that rotation is calculated parallel to a selected map projection.

  • Page 39: Remote Elevation

    RTK Data Collection 7. If you set your base up on a known point, then the base station coordinates are already entered into the Base Station Local Coordinate fields. Tap Solve> to calculate the localization parameters. Tap Accept to finish setup and return to the Projection screen.
  • Page 40 Survey Pro GPS User’s Manual The following conditions must be met in order to use the Remote Elevation routine. • The base and rover must be set. • The vertical projection mode must be set to Localization (+Geoid) and a geoid model must be attached to the current coordinate system.

  • Page 41: Localization Default Zone

    When your horizontal projection mode is Ground – TDS Localization, there is usually no need for you to setup the map projection zone used. Survey Pro will initialize a default map projection, scaled for ground distances, when you set the first RTK base in the survey.

  • Page 42: Localization Select Zone

    Alternatively, you can toggle this control and enter the Origin Scale directly. Note: If you have an RTK base configured in Survey Pro, and if you wish to set up this localization zone to match the setup group and location of that base, tap Same As Base to fill in all the parameters on this screen.
  • Page 43 RTK Data Collection a localized map projection site from the database, tap Use Database Site. 3. If you are picking a map projection zone, select the Zone Group from the drop down list. 4. Select the Zone or Site from the drop down list. 5.

  • Page 44: Key In Zone

    Survey Pro GPS User’s Manual Key In Zone Use the Key In Zone screen to create a custom map projection and a custom datum transformation to add to the coordinate system database file. You can then select this zone as the coordinate system to use in your job.
  • Page 45 RTK Data Collection Note: The geodetic calculation engine and the Survey Pro coordinate geometry engine are separate components. While the geodetic engine can properly handle southwest grid systems, Survey Pro can only operate on a northeast grid system. However, since a southwest grid...

  • Page 46: Mapping Ground Coordinates

    Survey Pro GPS User’s Manual 12. Tap Next. If you are using a Custom Molodensky datum, the next screen will be the final screen where you can Store the record. 13. If you are using a Custom Similarity datum, enter the rotation from WGS84 to the local datum.
  • Page 47 RTK Data Collection Switching from Grid To Ground 1. Any time a Mapping Plane mode zone or localized site record is selected, go to the Survey | Projection screen and tap Setup Ground Coordinates… . 2. In the Projection Definition box, select Use Ground Coordinates.
  • Page 48 Survey Pro GPS User’s Manual 6. Review the Ground Coordinate parameters: Reference Point Location, Ground Offsets, and Ground Scale. When you are satisfied with the setup, tap Finish. 7. If your projection record is a map projection zone, the ground coordinate parameters will be added to the zone record to create a zone based site.

  • Page 49: Vertical Projection

    RTK Data Collection Note: If your projection is a zone based site, then the localization parameters will automatically be converted back to the map projection values. You do not have to resolve the localization. 4. Switching back to mapping plane grid coordinates, the conventional Survey Scale Factor is usually set to 1.0.

  • Page 50: Using Ellipsoid Heights

    Survey Pro GPS User’s Manual • Use the Remove Geoid From Zone button to remove the geoid model from the current projection record. Using Ellipsoid Heights Ellipsoid Height mode is a method that stores the local ellipsoid height measurement as the vertical coordinate. Use ellipsoid heights if the...
  • Page 51 RTK Data Collection Lat, Lng, Ht will store an EP record in the .RAW file for each point accepted. EP + Bl,CV will store an EP record, plus the raw base line (dX,dY, dZ) and variance covariance information in the .RAW file.

  • Page 52: Data Collection

    Survey Pro GPS User’s Manual 5. Set the Acceptance Criteria. Acceptance Criteria is used to check each solution you accept. If the measurement exceeds the criteria, you will be prompted to accept or reject the point. Check this box if you want to enable criteria checking. Enter a maximum value for HRMS, VRMS, and/or PDOP in the fields.
  • Page 53 RTK Data Collection 4. If your antenna height has changed, enter a new value in the Rover field to update the value in Survey Pro and in the receiver. If your antenna type and measure to method have changed since Rover setup, then tap Setup HR to change and update it.
  • Page 54 Survey Pro GPS User’s Manual Note: You can enter the offset data before or after you occupy the reference point with GPS. 3. Tap Occupy GPS to occupy the GPS reference point. You will be prompted for a point name to store the reference point. The receiver dynamics are set and a site occupation begins.
  • Page 55 RTK Data Collection Feature Collection Use this method if you want to continuously collect multiple points using either a measurement interval or by manually accepting each point. You can select from six different data collection modes. 1. Go to the Survey | Data Collection screen. 2.
  • Page 56 Survey Pro GPS User’s Manual 9. If your mode is Manual, tap Accept when you want to collect a point. If your mode is Manual: multi descriptions, you will be prompted for a description, layer, and attributes (if set) for each point.

  • Page 57: Rtk Stake Out

    The receiver session will be completed and the measurement stored when you tap Done. The occupation is not stored in the Survey Pro .RAW file if you toggle back to ROVING.
  • Page 58 Survey Pro GPS User’s Manual Note: Five Hz mode is for quick navigation to the point, it does not provide the most precise solution of coordinates. When you switch from roving to occupying, the receiver is automatically switched to one Hz. When you switch back to Roving mode, the receiver will...

  • Page 59: Post Processing

    PC is used to process the base line measurements. This section describes how to collect GPS raw data for post processing with Survey Pro. In this section, you will learn: How to start a static post processing session.

  • Page 60: Start Recording In Receiver

    If you tap Post Processing when connected to the RTK base or rover, Survey Pro will check the receiver to see if it is currently logging data. If it is, you will be prompted if you wish to stop data logging on this receiver.

  • Page 61: Data Collection

    ID must be a unique point name in the Survey Pro job and you will be prompted to put the point on the autonomous layer. If you choose to store the point in the Receiver file only, the site ID can be any valid name for the receiver and you are not prompted for layer or attributes.

  • Page 62: Office Procedure

    Survey Pro GPS User’s Manual 5. Tap Start to mark the beginning of this site occupation in the receiver raw data. If you are storing the point in Survey Pro, you will be prompted for the autonomous layer and attributes (if set) at this point.

  • Page 63: Projection Utilities

    Projection Utilities Survey Pro has a number of tools to help you work with map projections and coordinate system. This section describes the Adjust with Projection wizard and the Projection Calculator tools. In this section you will learn: How to use the Adjust with Projection wizard to update the job file points when the coordinate system changes.

  • Page 64: Adjust With Projection - Select Points

    Depending on your choice, you will select the source and destination coordinate systems, the adjustment will be calculated, and Survey Pro will show the Results screen. When you tap Apply, the point coordinates will be updated, but this routine will not change the coordinate system settings.
  • Page 65 Projection Utilities coordinates will be transformed into the destination coordinate system using their WGS84 values. Points with plane only coordinates will be transformed into temporary WGS84 coordinates using the source coordinate system, then transformed into new plane locations using the destination coordinate system.

  • Page 66: Adjust With Projection - Select Coordinate System

    Survey Pro GPS User’s Manual Adjust with Projection – Select Coordinate System The Adjust with Projection Select Coordinate System screen is used to select the source and destination coordinate system when your adjustment mode is Source to Destination Projection, or to view details of the current projection when your adjustment mode is Readjust with Current Projection.

  • Page 67: Adjust With Projection - Results

    Projection Utilities 1. Choose to Adjust job with new projection or Do not adjust job. • If you pick Do not adjust job, then the Next> button is hidden and the Done button shows. Tap Done to update the coordinate system but not change any job file points.

  • Page 68: Projection Calculator

    Survey Pro GPS User’s Manual Projection Calculator You can use the Projection Calculator to calculate combined scale factor for scaling conventional distance measurements to the mapping plane. You can also use the Projection Calculator to calculate meridian convergence for reducing geodetic azimuths (such as a sun shot) to grid bearings.

  • Page 69: Managing Gps Coordinates With Tds

    Managing GPS Coordinates with TDS Survey Pro for Windows CE uses a binary file with the extension *.job. A .JOB file point record will contain a point name, plane location (N, E, Z), and a description. It may also contain geodetic...

  • Page 70: Import

    Survey Pro GPS User’s Manual 2. The three cards of the Edit Point screen display the current properties and the plane and geodetic locations of the selected point. 3. On the Geodetic card, you can tap Advanced to open the Edit GPS Point Flags screen.
  • Page 71 ASCII text file. The ASCII Import Wizard allows you to import Plane, Geodetic (DMS), and Geodetic (decimal) coordinates. When you import Geodetic (DMS) and Geodetic (decimal) coordinates Survey Pro will use the following rules to set the plane location: •...

  • Page 72: Foresightdxm And Tgo

    TGO / TTC Using TGO or TTC, you can download Survey Pro job and raw files to your hard drive, convert them into Trimble DC files, and import them into a TGO or TTC project. For both TGO and TTC, the download is done with a common Trimble component called ‘Data Transfer’.
  • Page 73 Managing GPS Coordinates format and imported into the TGO/TTC project. You can also convert and import a file already on disk using the Import function. TGO / TTC download and import requires you to choose the .job or .raw file separately. For most purposes, you will just need to import the .raw file.

  • Page 75: Gps Coordinates

    This section offers a more detailed description of some theory and terminology used to describe geodetic coordinate systems and datums in Survey Pro. In this section, you will learn: A description of the WGS84 datum and how to use different horizontal datum transformations in Survey Pro.
  • Page 76 • Molodensky Transformation: Is the most commonly used transformation. Three parameters specify an X,Y,Z shift between WGS84 and the local datum origin. Survey Pro uses the Molodensky datum transformation algorithms specified in the National Imagery and Mapping Agency Technical Report 8350.2.

  • Page 77: Horizontal Datums

    Clarke 1866 ellipsoid, which was the best fitting ellipsoid for the North American continent at the time. Survey Pro performs a grid transformation for NAD27 in the United States using the NADCON datum sets in *.DGF (datum grid file) format.
  • Page 78 These rotations are small enough to ignore except for the most precise first order applications. If your Survey Pro job requires a local datum in one epoch of WGS84 and the WGS84 datum in a different epoch, you can setup a seven- parameter similarity transformation.

  • Page 79: Vertical Datums

    A and B order control monuments across the states. Survey Pro performs a grid transformation for HARN networks in the United States using the NADCON datum files in *.DGF format. Note: To use a grid datum, you must have the pair of *.dgf files for latitude and longitude shift in the correct geodata directory on the data collector.
  • Page 80 Survey Pro GPS User’s Manual used in the definition of the initial WGS84 datum. Below is a description of some vertical geoid models and datums. Vertical Datums • EGM96 The National Imagery and Mapping Agency publishes the global geopotential model EGM96 .

  • Page 81: Coordinate Systems

    GPS Coordinates Survey Pro does not require choice of a specific vertical datum. For RTK applications, elevations are solved relative to the base using the vertical localization adjustment. Therefore, the vertical datum is established by the datum of the base elevation.
  • Page 82 Survey Pro GPS User’s Manual • ECEF XYZ Geodetic coordinates are some times given in the Earth Centered Earth Fixed (ECEF) Cartesian coordinate system. This coordinate system has its origin at the Earth’s center of mass, the primary (Z) axis is the earth’s spin axis; the secondary (X) axis is the intersection of the equatorial plane and the mean meridian of Greenwich;...

  • Page 83: Horizontal Coordinate Systems

    GPS Coordinates Horizontal Coordinate Systems Survey projects use horizontal coordinates on either a local plane or a map projection. For small projects, you can assume a simple flat earth plane and calculate coordinates directly with measured distances. Use Ground - TDS Localization mode for this procedure. For large projects, a mapping plane is used to accurately represent the curved surface of the earth on a flat plane and conventionally measured distances need to be scaled to the mapping plane grid.
  • Page 84 Survey Pro GPS User’s Manual • Area A map projection is equi-areal when it correctly plots areas over the entire map. That is, all mapped areas have the same proportional relationship to the areas on the Earth that they represent.
  • Page 85 GPS Coordinates • Stereographic The Stereographic projection results from projecting an ellipsoid onto a plane. Directions are true from the center point and distortions in scale, area and shape increase uniformly away from the central point. The stereographic projection is azimuthal. Because the scale is distorted somewhat uniformly in all directions, stereographic map projections are a good representation of a surveyor’s typical flat earth ground coordinate system.
  • Page 86 Survey Pro GPS User’s Manual K=1.0 K=1.0 K<1.0 K>1.0 K>1.0 K=0.9996 Distance on Ellipsoid Mapping Plane Distance on Map Central Meridian Fig. 3: Transverse Mercator Mapping Plane A side view of the cylinder shows the effect of scale distortion. Mapping...
  • Page 87 GPS Coordinates Distance on Ground Ellipsoid Height, h Distance on Ellipsoid Radius of Ellipsoid, R Fig. 5: Ellipsoid Scale Factor The effect of height above the ellipsoid on scale. Ellipsoid Scale Factor This scale factor accounts for the height of the ground above the reference surface (the ellipsoid).

  • Page 88: Vertical Coordinate Systems

    Fig. 6: The Height Equation Geoid Models in TDS Software Survey Pro has several geoid models in the coordinate system database. All of the geoid models use data files in geoid grid file (*.GGF) format. Note: To use a geoid model, geoid data files (*.GGF) must be in the Geodata directory.
  • Page 89 • In Australia you can use the AUSGEOID98 geoid model. Note: To use any of these geoids with Survey Pro, you need files in Trimble .ggf format. For the US, Canadian, and EGM geoid models, you can convert the files from their original format into .ggf format using the Geoid File Convert and Sub Grid function in ForesightDXM.

  • Page 91: Tutorial Jobs

    Tutorial Jobs This section contains sample jobs to illustrate all of the main functions of Survey Pro GPS Module. Each job illustrates different horizontal and vertical projection methods as well as different GPS field procedures. Before Starting • Make sure you have the file demofile.txt in the same directory as the Survey Pro executable (usually in Disk\Program Files\Survey Pro or Built In Storage\Program Files\Survey Pro).
  • Page 92 Survey Pro GPS User’s Manual 1. Create a new job. • Enter Point Name 2 as the starting point and enter a starting location of (5000, 5000, 100). 2. Set the base and rover. • Go to Start GPS Survey, choose Start Survey with One Point Setup>.
  • Page 93 • Enter a new point name for the Base Point Tap Next> and then Set to set the base and configure the reference position in Survey Pro. • Connect to the Demo Mode rover and tap Set Rover> to complete equipment setup 3.
  • Page 94 Survey Pro GPS User’s Manual Note: Because you imported points as job file control points, you will see a message that GPS control point collection will modify the job file control point. Geodetic coordinates will be added to the plane only point.
  • Page 95 Tutorial Jobs in which case the rotation value will adjust to the local bearings. • The Delta values represent the shift from the TDS default stereographic zone false northing and easting (100000.0, 100000.0) to the local system (5000.0, 5000.0). • Tap Accept to complete the wizard.
  • Page 96 Tap Set New Base>, and enter Chap as the Base Point. • Tap SET to set the base and configure the base position in Survey Pro. Tap Set Rover> to set the rover. • The coordinate system is already solved, so you are ready to collect data.
  • Page 97 DOS software. • The geodetic coordinates for point 1 are computed. Tap SET to set the base and configure base position in Survey Pro. • Tap Set Rover> to finish equipment setup. Because the coordinate system is already solved, the Data Collection screen opens and you are ready to collect more points.
  • Page 98 Base>. Tap Set Rover>. • The base reference position is received over the radio link, and Survey Pro finds your original base point. Tap Next> and Set to complete GPS Setup. • The Data Collection screen opens and you are ready to collect data 4.
  • Page 99 Tutorial Jobs 5. Data Collection • Occupy b1,b2,b4,bChap,bMane as data collection points. 6. Resolve the horizontal localization adjustment with a fixed scale adjustment • Tap Control, Projection, Solve Localization to open the Solve Localization wizard. • Tap Solve Rotation Only to constrain this adjustment to fix the scale to 1.0.
  • Page 100 Survey Pro GPS User’s Manual • How to switch from Ground Coordinates back to grid coordinates. • How to set the survey scale factor for a point on a map projection. • How to use the survey scale factor when storing COGO points on a map projection grid.
  • Page 101 Tutorial Jobs Set to set the base and configure the base reference position in Survey Pro. • Tap Set Rover> to set the rover 5. Solve the mapping plane localization adjustment. • Tap Collect Control> to open the Control Points screen.
  • Page 102 Survey Pro GPS User’s Manual 7. Occupy the as built point in static mode for the most precise measurement. • Make sure your settings are correct for static RTK shots. Tap Settings and make sure Receiver Dynamics are set to Static on Occupy.
  • Page 103 Tutorial Jobs 10. Set the scale factor for conventional measurements. • When using ground coordinates, distances on the ground are 1:1 to the coordinate grid. Therefore, the survey scale factor, found on the Job | Settings | Surveying screen, should be set to 1.0.
  • Page 104 Survey Pro GPS User’s Manual • Set the backsight azimuth as the azimuth. You can enter b54 – bchap. • Set the +- angle the same as the previous shot. You can enter 135 here, or use the power button to choose Past Results, and pick your last horizontal angle.
  • Page 105 Tutorial Jobs 16. Examine the inverse between points to see the effects of scale factor. • Examine the inverse between PiD101 and 101, they should still be at the same location. • Examine the inverse between bChap and 101, notice the horizontal distance is now less than 1000 17.

  • Page 107: References

    References Books: The following books are available from various sources, including the America Congress on Surveying and Mapping: 5410 Grosvenor Lane, Bethesda MD, 20814 Phone: (301) 493 0200 Email: books@acsm.net For a basic description of GPS hardware, field procedures, network design, planning observations: Van Sickle, Jan.

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