Spectra-precision FAST Survey Reference Manual Manuel d'utilisateur télécharger pdf (Page 110)

p108

Run Carlson SurvCE on the handheld device and select

Data Transfer

from the FILE tab.

From within the

Data Transfer

dialog, select the

SurvCADD(Carlson Civil)/Carlson Survey Transfer

option.

Leave the data collector waiting for communications as shown by the resulting

File Transfer

dialog.

Launch either Carlson X-Port or SurvCOM from your desktop computer. If you are using Carlson X-Port, select

Carlson SurvCE/SurvStar/G2

from the

Tools

menu to launch SurvCOM.

From within SurvCOM, and while connected to the handheld computer via a serial cable, you should be able to see

the contents of the handheld device on the right and the contents of the desktop computer on the left simultaneously.

If you do not see the handheld device on the right, you are not connected.

10.

Select the

Geoid

icon located at the bottom of the

SurvCOM

dialog.

11.

From within the

Set Geoid Area

dialog, verify the path to the geoid files is set to the installed location of these files

as defined in step 2 of this document (Typically “…Program Files\Carlson X-Port\”).

12.

Select the desired geoid model to extract an area from.

13.

Key in the approximate latitude and longitude of the center of the area.

14.

Define the grid size for the area you want the model to cover (Supported sizes are 50-250 miles, 80-400 kilometers

and 1-5 degrees, however, keep the size 100 miles or smaller for better performance).

15.

Name the geoid model with any name that you want (e.g. "geoid"). You may want to name this file with a logical

name for the location of the area for future reference (e.g. "geoid-LA").

16.

Select the

button to automatically transfer the file to the “…\Survstar\” directory of the handheld device. A

copy of the file will also be created on your desktop computer in the currently selected folder.

17.

On the handheld device, go to the FILE tab and select

Job Settings

, then choose the GPS tab.

18.

Select the

Geoid Separation File

button and choose the geoid file you created and transferred with SurvCOM.

19.

You have now completed the definition and selection of the geoid file. Select

to exit the

Job Settings

dialog.

Points Tab

This tab is where the user adds pairs of positions to create a localization.



View:

The local coordinates are shown in the POINTS tab by default. Pressing

View

will switch the view to show

the geodetic, Lat/Lon coordinates.



Scale:

The Scale Factor, shown in the Localization dialog when two or more localization points are used, is a

multiplier and represents “grid to ground”. When configured to GPS in release 1.50.004 or higher of SurvCE, any

GPS localization scale factor is displayed within the UNITS tab of

Job Settings

in inverse form to represent

“ground to grid”.



Add

: Enter the alignment or localization points by coordinate values or by entering a point number. If you choose

the point number method, you can enter a point number or select them from the point list. If you choose the

From

List

method, you can access points in the Control File, if a Control File is active (See Job Settings, Options). You

can average as many readings as you like when you add points, and view the range and residuals. It is

recommended that you use the point number option and carefully hand-enter your local grid system coordinates

first, using either List Points, option

Add

, or Keyboard Input. Entry of coordinates “on-the-fly”, in the field,

provides opportunity for error. Once you click

in the coordinate dialog, you will have three options for

establishing the GPS position for the named local point.

Add Method 1--Read GPS:

This allows you to collect measurements from the GPS receiver and average as

many readings as you choose. Once the readings are complete, the software will present a dialog that displays

the range and residuals of the averaged readings.

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Spectra-precision FAST Survey Reference Manual Manuel d'utilisateur Page 110

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