Technology Technical Note MO-6 - USDA...User’s Guide i August 2015 Technology Technical Note MO-6 Trimble GPS Survey Operations User’s Guide August 1, 2015 Prepared by: Unites

August 2015

Technology Technical Note MO-6

Trimble GPS Survey Operations User’s Guide

i August 2015

Technology Technical Note MO-6 Trimble GPS Survey Operations User’s Guide August 1, 2015 Prepared by: Unites States Department of Agriculture Natural Resources Conservation Service Missouri State Office 601 Business Loop 70 West, Suite 250 Columbia, Missouri 65203 www.nrcs.mo.usda.gov The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and employer.

Technology Technical Note MO 6

August2015 ii

Table of Contents Page GPS Surveying Concepts and Techniques ................................................................. 4 Types of Surveys........................................................................................................... 4

Control survey— .................................................................................................................................. 4 Topographic survey— .......................................................................................................................... 5 Construction survey— ......................................................................................................................... 5 As-built survey— ................................................................................................................................. 6

Trimble TSC Survey Controller – Hardware ................................................................ 7 Trimble Access – Startup ............................................................................................. 8 General Survey Menu Structure ................................................................................... 9 RTK Setup .................................................................................................................... 10

Starting Job ........................................................................................................................................ 11 Start Base Segment ........................................................................................................................... 13 Start Rover Segment .......................................................................................................................... 15 End RTK Survey ................................................................................................................................. 17

VRS Setup .................................................................................................................... 19 Starting Job ........................................................................................................................................ 20 Measuring points ................................................................................................................................ 23 End Survey ......................................................................................................................................... 26 VRS Modem icon ................................................................................................................................ 27 Redial Options: ................................................................................................................................... 27

Changing Coordinate Systems .................................................................................. 29 State Plane Boundaries ...................................................................................................................... 30

Point Averaging ........................................................................................................... 31 Link Jobs or Points ..................................................................................................... 34 Field Codes .................................................................................................................. 36

Editing Field Codes ............................................................................................................................ 37

Target Height ............................................................................................................... 38 Option 1 - Selected Points .................................................................................................................. 38 Option 2 - Single Point ....................................................................................................................... 39

Site Calibration ............................................................................................................ 40 1‐Point Site Calibration ....................................................................................................................... 40 Multi Point Site Calibration ................................................................................................................. 42

Stakeout ....................................................................................................................... 44 Terrace Points .................................................................................................................................... 44

Export from EFT .......................................................................................................... 47 Transfering .xml file ............................................................................................................................ 47 Surface Only ....................................................................................................................................... 48 Roads, Alignment ............................................................................................................................... 50

Export ........................................................................................................................... 54 CSV Format ........................................................................................................................................ 55 Trimble JobXML ................................................................................................................................. 56 ESRI Shape ........................................................................................................................................ 57


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GPS Surveying Concepts and Techniques GPS positioning techniques are dependent upon the purpose of the survey and its intended use. In general, positioning may be divided into point positioning for high-order control purposes or topographic and construction surveying of unknown positions utilizing the control points. For control purposes, the techniques of static positioning should be used. Kinematic (also called DGPS) or RTK techniques should be used for all construction and topographic purposes. Types of Surveys Control survey— A control survey is a high-order survey primarily used to establish horizontal and/or vertical monuments that serve as a reference for other surveys. The purpose of a control survey is to establish the location of a reference point in an arbitrary location for use later in additional survey work. The following considerations should be given to the number and location of control monuments:

• One Point site calibration for vertical position adjustment only requires a single known point.

• A minimum of four control points are needed to perform a full multipoint site calibration for horizontal and vertical position.

• Additional control monuments shall be set in case some are damaged or removed. A minimum of two control points shall be established.

• All control monument locations shall be durable stable points that can be maintained during the period of project activities requiring survey control.

• All control monuments must have a clear view of the sky —360 degree clear sky greater than 10 degrees above the horizon. —Consider vegetation growth and seasonal variability of vegetation

• The outer boundary control monuments need to be spaced with significant separation in both the north/south and east/west directions (good strength of figure).

• When a site calibration has been performed, the survey must stay within the polygon created by connecting the outer control points (convex hull).

• Try to centrally locate the base station control point within the control network.

• Try to locate the base station control point at a high point where radio communication between the rover and base will have the least interference from dense trees and landforms such as ravines and hills.

• Observation times shall be a minimum of 3 minutes when using a VRS network and 2 hours when utilizing a post processing procedure such as OPUS.

• More than one observation shall be recorded on each control point when set by VRS network survey.


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Topographic survey— A topographic survey is a special type of survey used to establish ground elevation points for map contour generation. Topographic surveying will generally use RTK techniques. The accuracy requirements for the design will determine the density of the data points needed to represent the topography. It is important to obtain breaklines at major slope changes that occur within a small distance. For example the slope changes from the front slope of a dam to the top of a dam and ridgelines and drainages. RT surveys differ in that the calculations are made at the time the data is collected and is immediately usable. The general procedures for topographic surveys are:

• The RTK base receiver is set over a control (known or to be established) position point.

• If a known position is not available, a static GPS control point can be established while topographic surveying and setting additional control points as long as the base is running for the minimum time shown in table 1.

• Post processing against a different base station or CORS will be required. A minimum of three additional control points should be set on the outer bounds of the construction site for future site calibration.

• If control has already been established onsite, a site calibration should be performed.

• The rover is positioned over a point whose coordinate position is desired

• ——The rover receiver is then moved in a radial manner to each required point and held until a locked position is acquired (typically 5 seconds to 30 seconds), or ——The rover is moved OTF, for example, by ATV.

• Verification of the survey results should be made prior to the end of the survey and any data processing should be done at that time where applicable.

• After verification it is important to close the survey job. This step sets important information into the data file that will be read later by the processing software. Not closing the survey job may result in problems with the data input during post processing.

• Data should be downloaded to a PC or laptop as soon as possible following the survey.

Construction survey— A construction survey is performed to provide horizontal and vertical positions for construction projects like buildings and parking lots and to assist in construction quantity estimates. —Construction surveying is the setting of stakes or other markings used to control the elevation, horizontal position, dimension, and configuration of constructed items. Construction applications for GPS are primarily in survey staking or stake-out, the marking of sites for grade alignment, or structural locations. Construction surveying procedures with GPS can only be done using RTK. The general procedures for construction stake out surveys are:

• The RTK base receiver is set over an established benchmark generally published on the project drawings.

• To stake out grid coordinates, define a projection and datum transformation.

• A full site calibration is recommended using a minimum of four 3D points.

• Define the point/line/arc/DTM by keying in the data, transferring a file from a PC, or calculate coordinates using a COGO function.

• Navigate to the point.

• Stake out the point.


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• Check point once set.

• Establishment of additional benchmarks by static surveying methods may be required outside the construction limits. It is important to recognize that on a construction site the control point set may be used many times and must be fairly permanent.

As-built survey— An as-built survey provides positioning for the exact and final location for construction projects as they proceed. These surveys are especially important in documenting any construction changes to original plans.


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Trimble TSC Survey Controller – Hardware

TSC 3 Windows Start Menu Button. TSC 2

If Access is not running push the Trimble Button

to start it.

Power On (Green button, lower left hand corner)


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Trimble Access – Startup Trimble Access Main Screen

HELP

This is always helpful

Switch Screens Use the Trimble Icon to switch between screens if there

are multiple screens opened. It is much faster than

shutting down the current screen and opening a new

screen


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General Survey Menu Structure

Jobs Menu Measure Menu

Key in Menu Stakeout Menu

Cogo Menu Instrument Menu


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RTK Setup To begin, select the General Survey icon on the main screen. Select the Instrument icon on the lower right side of the screen. Select the GNSS functions on the upper left side of the screen. Select the Bluetooth icon on the right side of the screen


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In the Bluetooth screen Under the (Connect to GNSS rover, GNSS base:) Tap the dropdown arrow and select the receiver you need to connect to for the Rover and Base Your receiver is identified by the last four (4) digits of the serial number displayed on the side of your unit. Leave all other fields set to none. Tap Accept. Select the Base Mode icon on the left side of the screen Connecting to Base via Bluetooth. Select ESC

Starting Job Verify the location where the job will be stored by selecting the folder icon at the right end of the Job name entry field. Select the Jobs Folder. You will return to the New Jobs screen.


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Enter your preferred job name, e.g. Be Happy Farms. Your job is then stored in the Jobs Folder.

NOTE: Setting the Ground scale factor is required for each site that is surveyed. Select 15 North (UTM) to the right of the Coord. Sys.: Be sure Select from Library is checked. Tap Next.

Tap twice


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On the Project Location screen Tap the Here tab in the lower left corner. The Latitude, Longitude, and Height will be updated for your location, and the Ground Scale factor is calculated and is shown on screen 2 of 3. Tap Store. You will be returned back to the Job Name and properties screen. Tap Accept.

Start Base Segment Tap Measure icon Tap R8-R8 RTK Tap Start base Receiver


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Select the arrow to the right of point name Select Key IN Enter your desired point number, e.g., 20 Enter your desired field code, e.g., 81, Control Point On the Project Location screen Tap the Here tab in the lower left corner. The Northing, Easting, and Elevation will be updated for your location. Tap Store Antenna height: Enter your Antenna height followed by the letter “M” meters. The controller will convert the meters to Survey Feet. Measure to: Default is set to Bottom of antenna mount. Tap Enter Tap Start Base segment of survey started.


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Start Rover Segment Tap Measure Icon Tap R8-R8 RTK Tap Measure Points Connecting to GNSS Rover via Bluetooth.


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Base Station Reliability Tap Accept. Enter your desired point number, e.g., 1000 Enter your desired field code, e.g., 70, Topo Select your method, e.g., Topo Point. Enter your Antenna height followed by the letter “M” meters. The controller will convert the meters to Survey Feet. Measure to: Default is set to Bottom of antenna mount. Tap Enter When all fields are correct Tap Measure. Continue with your survey.


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End RTK Survey Tap the Measure icon. Tap End GNSS Survey. Tap Yes to Power Down Receiver. This powers down the rover receiver Must be within Bluetooth range of the Base Receiver. Tap the Measure icon. Tap R8-R8 RTK


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Tap End GNSS Survey.

Press the power button on the TDL 450H Radio until it shuts off. Disconnect all cables.


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VRS Setup Turn on the TSC2 by pressing the green power button. If the controller has undergone a Hard Shutdown, it may take a few moments to reboot. If Trimble Access does not open automatically, open it either through the start menu or by pressing the Trimble Button. When Access has opened, the main Access screen should appear as shown below.

To begin, select the General Survey icon on the main screen. In a few seconds the satellite status will populate with number of visible satellites If satellite status does not populate (see below). To connect to a receiver tap the flashing GPS icon on the right side of the screen. In the Auto Connect screen Tap the Bluetooth tab


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In the Bluetooth screen Under the (Connect to GNSS rover :) Tap the dropdown arrow and select the receiver you need to connect to. Your receiver is identified by the last four (4) digits of the serial number displayed on the side of your unit. Leave all other fields set to none. Tap Accept. Then tap Accept again. In a few seconds the satellite status will populate with number of visible satellites.

Starting Job Select New Job from the Jobs Menu

Verify the location where the job will be stored by selecting the folder icon at the right end of the Job name entry field.


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Select the Jobs Folder. You will return to the New Jobs screen. Enter your preferred job name, e.g. Be Happy Farms. Your job is then stored in the Jobs Folder.

NOTE: Setting the Ground scale factor is required for each site that is surveyed. Receiver needs to be set on the TBM, this will allow you to relocate the TBM if destroyed.

Select 15 North (UTM) to the right of the Coord. Sys.: Be sure Select from Library is checked. Select Next.


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Tap twice On the Project Location screen Tap the Here tab in the lower left corner. The Latitude, Longitude, and Height will be updated for your location, and the Ground Scale factor is calculated and is shown on screen 2 of 3. Tap Store. You will be returned back to the Job Name and properties screen. Tap Accept.


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Measuring points

Tap Measure icon Tap Missouri VRS Tap Measure points Tap the modem (Cell Phone) that you are using. e.g., MO VRS


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The following screens will appear and disappear rapidly while connecting to MoDot’s VRS network

1) 2)

3) 4)

5)

When initialization has been gained you will return back to the Measure Points screen.


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Enter your desired point number, e.g., 20 Enter your desired field code, e.g., 81, Control Point As you enter your desired field code, the field code library will filter through the list until your desired code is displayed. Method: Select your method, e.g., Observed control point, Topo Point. Antenna height: Enter your Antenna height followed by the letter “M” meters. The controller will convert the meters to Survey Feet. Measure to: Default is set to Bottom of antenna mount. Tap Enter When all fields are correct Tap Measure. Continue with your survey.


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End Survey To end your survey, tap Esc on the Measure Point screen. Select the Measure icon. Select End GNSS Survey. Tap Yes to end the internet connection if prompted. Tap Yes to Power Down Receiver.


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VRS Modem icon This indicates internet connection is established through the cell phone modem. This indicates internet connection is disabled through the cell phone modem.

Redial Options:

If the cell phone modem drops service you will be prompted to reconnect by tapping the redial button. Selecting the radio icon will open the Rover Radio status screen. Select Redial in the lower left corner. After connection is established, tap Back.


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With Access installed on the Controller, the Bluetooth is always active, even if you just shut off the unit, and is still consuming battery power. To shut down the controller completely, do the following to conserve battery power.

Tap Esc to exit out of Measure Points. Tap Exit or press the ESC key on the controller. Tap Yes to confirm Shut down of General Survey. From the Trimble Access main menu, Tap the X in the upper right corner or press Esc key on the controller Tap OK to shut down Trimble Access Hold down the Power key for about 3 to 5 seconds to display a countdown. Continuing to press the Power key will cause a reset when the countdown reaches zero. If you release the Power key while the countdown is proceeding, you access the following menu.

Tap Shutdown The Data Controller will be Completely Shut down.


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Changing Coordinate Systems Example: Data collected by others were turn in to local field office, the coordinates are in Missouri State Plane, Central zone, USft. In PNEZD format. Points were imported into EFT and designed.

The landowner requested the design be in electronic format for his contractor, design was exported from EFT into a XML and CSV format for construction purpose.

So how does NRCS work with State Plane Design in EFT for quality assurance or As-Built survey? Below are the steps to use a State Plane survey in our controllers. 1. Export the XML from EFT 2. Copy the XML file to the controller (See- Transfer the XML section on pg. 47 thru 49)

Create a New JOB Note: If you created a new job in the office it is good to have the Lat. Long and Height this can be found in ArcMap with the identify tool. Change the coordinate system in the Job Properties section to Missouri State Plane Central, USft.

Enter the Latitude, Longitude and Height Tap STORE the Accept


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Extract the Alignment from the XML (See – Roads, Alignment Section pg. 50 thru 54)

State Plane Boundaries


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Point Averaging Measure your control point using normal procedures. Re-measure the point a second time Access will warn you that the point exists in the database. Tap OK Change the Target Ht. to 2.0M Tap Enter Tap Measure


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When you store the point Access will prompt you for an Action Choices are shown on the Left Select Average from the dropdown Tap Enter Compute average screen shows the deltas between the two shots. Tap Store Re-measure the point a third time Access will warn you that the point exists in the database. Tap OK Change the Target Ht. to 2.45M Tap Enter Tap Measure Select Average from the dropdown Tap Enter


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Compute average screen shows the deltas between the two shots. Tap Store Open Point Manager to review the points The computed Ave. First point with 1.8m Ht. Second point with 2.0m Ht. Deleted Point from the first Ave. Third point with 2.45m Ht. Tap Details


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Link Jobs or Points You can link files (*.csv, *.txt, or *.job) to your current job to provide easy access to additional data.

Use a linked file to access points that do not exist in the current job, or that you do not want to import into the current job. Linked CSV points appear as a comma ( , ). Linked points from another job appear with their original point symbol. All linked points appear BLUE. You can use points from a linked file to:

1. Stake out without having the design points in the job 2. Enter values into Point name fields, such as for Cogo functions 3. Navigate to control or check shots from previous surveys

NOTE: You can link a file from any folder. a. In a linked job, you cannot access lines, or arcs. b. You can only review points in a linked file from the map. Once you select a linked point and copy

it into the current job, it appears as a "c" in the map. c. You can link multiple files (*.csv *.txt *.job). When the point does not exist in the current job,

but does exist in multiple linked files, the point in the first linked file is used. If multiple points of the same name exist in a linked job, the search rules work within that job to find the best point.

1. From the General Survey main menu, select Jobs /

Properties of job 2. Then tap the Linked files button. The Linked files screen

that appears lists the files in the current data folder.


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3. Tap the file(s) that you want to use for the current job

or tap All to select all files. 4. Tap Accept when complete. 5. Number of linked files is shown. 6. Tap Accept when complete. 7. Points shown in the map screen


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Field Codes


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Editing Field Codes When we forget to change the Field Code on a point or on a series of survey points. Trimble survey controller has the option to let us change the Field Code during a survey.

Tap “Favorites”. Tap “Point manager”. This example point manager displays the grid details for each point. Tap “display” in the lower left corner. Select “Code”. The display now shows the Point Number, Code, and Northing Easting. Select the point or group of points that need to be changed. Tap “Edit”. Select “Codes”. Enter the correct Code Tap “OK”. This will change the selected point or points to the correct Field Code. Tap “Display” Select “Grid” to return to the coordinate display. Tap “Esc” to return to your previous screen or Menu.


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Target Height As it most often happens that, we forget to change the target height on a point or on a series of survey points. Trimble survey controller has the option to let us change the target height during a survey.

Option 1 - Selected Points Tap “Favorites”. Tap “Point manager”. This example point manager displays the grid details for each point. Tap “display” in the lower left corner. Select “Target Height”. The display now shows the Point Number, Target Height, and Code. Select the points that need to be changed. Tap “Edit”. Select “Targets”. Enter the correct Target Height Tap “OK”. This will change the selected point or points to the correct Elevation. Tap “Display” Select “Grid” to return to the coordinate display. Tap “Esc” to return to your previous screen or Menu.


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Option 2 - Single Point Tap “Favorites”. Tap “Point manager”. This example point manager displays the grid details for each point. Tap the point that needs corrected. Tap the “plus” on the Left. Tap “Antenna”. Enter the Correct Target Height. Tap “OK”. Tap “ESC” to return to your previous screen or Menu.


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Site Calibration 1‐Point Site Calibration ** This only needs done one time per job ** The Following steps will allow you to adjust the vertical elevation from Mean Sea Level (MSL) to an assumed elevation (100.00) and continue to store and work in UTM Coordinates.

Measure the control point on site as an Observed Control Point. Minimum Time 3 minutes and store the point.

Tap Favorites Point Manager Record the Coordinates in Field Book.

Press “ESC”. twice to return back to the General Survey screen. Select the “Measure” Icon then Select “Site Calibration”. Site Calibration Screen Select “Add” Lower Left Corner.


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Grid Point name: Tap Right Arrow Select “Key in”. Fill in the Northing and Easting fields of the previously recorded point as a different point name i.e., 21 Change the Elevation Field to the assumed elevation i.e., 100.00 Place a check in Control Point: Tap “Store”. GNSS Point Name: Tap right arrow and select “List” and select your recorded survey point i.e., 20. Use: Select the dropdown and select “Horizontal & Vertical” Tap “Accept”. Tap “Apply”.


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At this point your survey has been converted to work in assumed elevation while your Northing and Easting are still in UTM coordinates. Check your Bench mark and review the elevations as shown below. Point 20 was the surveyed control point. Point 21 was the key in point. Point 22 is the check after the site calibration was done. MOCO is the MoDot Base station.

Multi Point Site Calibration

Requirements:

1. A minimum of four control points are needed to perform a full multipoint site calibration for horizontal and vertical position.

2. All control monuments must have a clear view of the sky 3. The outer boundary control monuments need to be spaced with significant separation in both the

north/south and east/west directions (good strength of figure) 4. Control points must encompass the entire work area.

Understanding Site Calibrations:

The site calibration process establishes the relationship between WGS-84 data collected by GNSS receivers and local control positions (expressed as a local map grid with elevations above sea level). This relationship is defined by a series of mathematical transformations. Site calibration enables you to pair up GNSS and local control points to be used in the calibration. (GNSS coordinates must be derived from GNSS points and observations, and grid points must be derived from grid points and terrestrial observations). This software then computes and applies the mathematical transformations using least squares. A local map grid may also be an assumed local system defined by the user. This type of grid can have an arbitrary value for Northing and Easting set at the origin. For example, the value for the origin could be 10,000 North and 10,000 East.

The mathematical transformations that are applied in order to convert WGS-84 positions to grid coordinates are:

1. A datum transformation to convert the WGS-84 latitude, longitude, and ellipsoidal height coordinates to latitude, longitude, and ellipsoidal height coordinates relative to the ellipsoid of the local map grid.

2. A map projection to convert the local ellipsoid latitude and longitude coordinates into local map grid northing and easting coordinates (the height value is not altered in this process).

3. A geoid model to WGS-84 height to get approximate elevation above sea level. 4. A horizontal adjustment of the transformed grid coordinates to best fit local control data. This

adjustment allows for any local variations in the projection system that cannot be accommodated in the overall datum transformation.


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5. A height adjustment to convert the heights above the local ellipsoid or elevations derived from the

geoid to local control elevations above sea level. The horizontal and vertical adjustment are stored as part of the coordinate system definition for the project. All GNSS points in the database are updated using the calibration parameters, resulting in more accurate local grid coordinate values.

Simply put, Site Calibration is a set of mathematical parameters that transform a point’s coordinates defined on one datum to the same point’s coordinates defined on another datum. The physical point does not change or move. It is the coordinates of the point that change.


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Stakeout Terrace Points This example explains how to stake a terrace on grade using the functions in Trimble Access to collect the points at a 50 ft. interval, from a selected riser location set in the field. This process can be performed starting at the end of a terrace also. It can also be used to survey a waterway and collect cross section data at any given point on the alignment. 1. On TSC start a new job using normal startup procedures.

2. Measure your first point on your terrace as a Topo Point and

store the point. a. From the measure screen,

Tap Menu Icon, (Right Side Menu) This will bring you back to the main screen

3. Tap Stakeout Icon,

4. Then select Points.

5. This takes you to Stake out Point Screen.

6. By tapping the “Closest tab in the lower left corner of screen

this will populate the point name field with the closest point recorded. (e.g., 3000)

7. Point increment should be set to 1. 8. Tap Stakeout


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The Bulls eye shows that you are at point 3000. 9. Now proceed away from Pt. 3000 to your next station on the terrace until you see the distance

traveled reach approx. 50ft. Look at the V.Dist. A cut value represents that you are higher than the previous point, A fill value represents that you are lower than the previous point.

10. When you are at the desired distance and cut or fill Tap Measure in lower center of screen.

11. Point name increases to next point number, enter desired

code (e.g., TE) 12. Tap Measure then Store in lower Right corner.

13. After the point is stored, you return back to Stake out Point

screen, 14. Proceed away from Pt. 3001 to your next station on the

terrace until you see the distance traveled reach approx. 50ft. and you are at the desired Cut of Fill.


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15. Steps 9 thru 14 assume that you are starting from the riser location and staking to either the right

end or left end of the terrace. 16. If this is the case you should return back to your starting point e.g., 3000 you will have to key or re-

select the starting point number e.g., 3000 17. Escape from the stakeout screen.

18. Next to Point Name Tap Right Arrow.

19. Select List

20. Select your starting point (e.g., 3000) 21. Tap Accept 22. Tap Stakeout 23. Resume with your survey.


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Export from EFT

To begin, select File from the main menu, Select Export click the right arrow Then select Surfaces

In the explorer window navigate to a location to store the .xml file.

Transfering .xml file Turn on the TSC2 by pressing the green power button. If the controller has undergone a Hard Shutdown, it may take a few moments to reboot On the computer, Windows Mobile Device Center should activate and recognize the device when connected.

a. Select “Connect without setting up your device”

b. Select ”File Management” Then Browse the contents of your device


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2) Navigate to the Folder where the file will be stored.

(i.e., My Windows Mobile-Based Device\Trimble Data\JOBS\)

3) Copy the .xml file from your computer to

the data controller folder location.

Surface Only Either open an existing job or create a new job using normal procedures. Tap Map on right side of screen Select white shift key to show more options in the lower right of screen. Select Layers hotkey button on bottom right of screen.


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Select the plus + in the upper left corner to expand the tree. Tap the exported item(s) you want to display on the map. This will place a checkmark next to the name. If you tap one a second time, you will see a dashed square on the checkmark. This indicates that it is "active" and can be selected for use in staking out. Tap it a third time to unselect it. Tap Options. For a surface, you can change the items in the Surface box on screen 2/2. If "Display color gradient" is checked, the surface elevations will be indicated with various colors. If it is unchecked, only the triangles of the surface will display. NOTE: Color Gradient and triangles will be hard to see when in

the field, recommend NOT using Color Gradient when staking.

Tap Accept. The object (surface feature) should then display on your map. If not, you may need to tap the "Zoom extent" button at the bottom of screen. The screen shot at right shows a surface with the Color Gradient and Tringles displayed. If the surface was set as active, the lower right corner of the screen will display the elevation and a cut or fill value for that surface at your current GPS location.


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Roads, Alignment Roads in a LandXML file can be used immediately in LandXML format in Trimble Access to stake as a “Roads” without any editing. But, if user wants to edit these Roads, see the Roads on the Map screen or perform any Cogo calculations from these Roads in the LandXML, the LandXML roads need to be converted to RoadXML (.RXL) format. Trimble Access Roads module will allow a user to create an .RXL from the .XML directly on the collector. From Trimble Access Select Roads. Select Define. Select the required .XML file. Select Edit


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A list of all Roads in the LandXML file will appear under the Road name: Select the road from the dropdown This will automatically create a Trimble Road (RXL) in the current job folder from the Road definition in LandXML Select Edit Select Review on the bottom to see the Horizontal Alignment or Select Edit to see the Horizontal Alignment stationing and curve data. Review Edit


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Being that there is no vertical profile to be extracted from the .XML we will have to create the profile from EFT Construction Checkout report. Select Vertical Alignment Select New bottom left corner Enter the Plan Channel Station and Elevation from the Checkout sheet Select Store Select New Entry Method: VPI Select OK


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Enter the next Station and Elevation Select Store Select New Continue entering Channel Profile Elevations After all data has been entered Select Accept Select Store when complete to save or rename the .RXL file


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After all alignments (.RXL) have been edited Select ESC then ESC again. Select ESC again to return to Roads

Export To transfer the new files from the data collector to the computer

1) On the computer, Windows Mobile Device Center should activate and recognize the device when

connected

NOTE: On the TSCe, you may need to respond to a “Connect to desktop?” prompt.

a. Select “Connect without setting up your device”

b. Select:”File Management”

2) Navigate to the Folder where the files are stored. (i.e., My Windows Mobile-Based Device\Trimble Data\JOBS\Export\*.csv) 3) Drag or copy the csv file from the data collector location to its new hard drive location 4) The csv file can now be imported in to a CAD program or Engineering Field Tools.


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Edits to the survey should be done at this time while in Trimble Access and before creating any output files.

Open the job that you need to export data from.

a) Select Jobs “Open job” b) Select the desired job

c) Select Jobs “Import/Export” then “Export Fixed format files”

CSV Format On the data collector in General Survey, go to: 1. Jobs “Import/Export” then “Export Fixed format files”

2. File Format: Select “Comma Delimited (*.CSV, *.TXT)” from drop down. 3. It is recommended that you keep the default file name the same as the job filename, for consistency.

Access will create a folder called Export under the original folder where the job file is.

4. The icon lets you pick the folder where the csv file will be saved to on the data collector (i.e.,Trimble Data\USDA NRCS\JOBS\Export)

5. Make these selections for each of the fields. Point name: Field 1 Northing: Field 2 Easting: Field 3 Elevation: Field 4 Point code: Field 5

6. Tap “Accept”:

7. Select “All points” from the list that you want included in

the csv file Tap “Enter”


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8. Tap “OK” once the transfer is complete The csv file is now created and saved on the data collector. NOTE: The file can also be opened in Excel for editing. For example, AutoCAD can only accept points with numerical names. If a name such as “BASE” or “BACKSITE” etc. was used in the survey, it will need to be changed to a number before importing the points in AutoCAD.

Trimble JobXML Trimble JobXML will export an XML file format so you can reload the job back into the controller at a later date, regardless of the version of Trimble Access that is running on you controller. It is recommended that you save the JobXML to the ToolKit folder. On the data collector in General Survey, go to: 1. Jobs “Import/Export” then “Export Fixed format files”

2. File Format: Select “Trimble JobXML” from drop down.


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3. It is recommended that you keep the default file name the same as the job filename, for consistency.

4. The icon lets you pick the folder where the JobXML file will be saved to on the data collector (i.e.,Trimble Data\USDA NRCS\JOBS\Export)

5. Version: Select the highest number in the list e.g., 5.64 6. Tap “Accept” 7. Tap “OK” once the transfer is complete

ESRI Shape 1. Jobs “Import/Export” then “Export Fixed format files”

2. File Format: Select “ESRI Shapefile” from drop down.

3. It is recommended that you keep the default file name the same as the job filename, for consistency.

4. Coordinates: Set to “Grid”

5. Tap “Accept”


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7. Tap “OK” once the transfer is complete.

Trimble Access makes the .dbf, .shp, .shx ESRI files for ArcMap, but it does not make the .prj (projection file) that ArcMap needs. There is a folder on the Data Controller called MO-NRCS Projections in that folder is a list of the projections needed for ArcMap.

Using File Explorer

1. Navigate to the MO-NRCS Projections folder on data controller

2. Copy the UTM83_z15ft.prj to the Trimble Data\USDA NRCS\JOBS\Export folder

NOTE: If your survey is setup in a different Coordinate System, then select the appropriate prj file.

3. Rename the .prj to the name of the .shp (e.g., Be

HappyFarms.prj) 4. Copy the four needed files to a server or to your hard

drive so they can be brought into ArcMap.


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Documents

Technology Technical Note MO-6 - USDA...User’s Guide i August 2015 Technology Technical Note MO-6 Trimble GPS Survey Operations User’s Guide August 1, 2015 Prepared by: Unites