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Setup by Grid Lines
To determine the position of an occupation point using measurements to two points on each of two known lines and calculated distances from the intersection point of these known lines to each measured point.
To use this type of resection, MAGNET Field requires data on two known lines intersecting each other and two measured points on each of these lines. Based on this data, MAGNET Field calculates four distances from the known lines intersection point to each of the measured points and performs resection to these points.
To configure resection settings, click
and select Options from the dialog menu. Configured settings retain between sessions.
The resection wizard helps you to perform the procedure:
- Specify the occupation point in the Define Instrument setup group.
- In the Occupy field, enter a name of the occupation point. If you determine the coordinates of an unknown occupation point, type in a new point name. If you want to recalculate the coordinates of the known occupation point choose the point either from the map
or from the list
.
- In the HI field, enter the height of the instrument.
- Set Code and attributes for the point.
- Select an existing Code from the drop-down list. You can manually type a code name. If there is no code with such name, the Code dialog will open when saving. There you can quickly create a new code with entered name.
- If the code type is Line or Area, the respective icon indicates that the point belongs to a line or area. Set a Code String and, if required, select an available Control Code (single or dual) from the drop-down list.
- Click the Code
button to access more code and attribute parameters in the Point Attributes dialog.
- In the Scale field, specify the scale factor for the occupation point. (This setting is available when User Defined is selected in the Scale Factor field in the Resection Options dialog.) Click
and select the scale factor for the occupation point. Available choices depend on the Coordinate System, Coordinate Type, and Localization that are used in the job. The asterisk (*) will be added to the scale value, if you have updated the initial value of the Scale field.
Note: The Scale setting is unavailable if WGS84 coordinate type is set in the Display dialog. The Scale setting is locked to Grid to Ground if the transformation to ground coordinates is enabled in the Coordinate System dialog.
- Click Next to proceed and specify known lines.
- Specify known lines intersecting each other: Line 1 and Line 2 in their respective groups.
- Measure any two points on each of two specified lines along line's direction:
At this step, specify and measure four points successively: first point on first grid line, second point on first grid line, first point on second grid line, second point on second grid line.
Note: Maintain the correct direction of the grid lines. The first point should be closer to the start of the line than the second one.
- Type in a name for the point.
- Set Code and attributes for the point.
- Select an existing Code from the drop-down list. You can manually type a code name. If there is no code with such name, the Code dialog will open when saving. There you can quickly create a new code with entered name.
- If the code type is Line or Area, the respective icon indicates that the point belongs to a line or area. Set a Code String and, if required, select an available Control Code (single or dual) from the drop-down list.
- Click the Code
button to access more code and attribute parameters in the Point Attributes dialog.
- Click Next to proceed with measurement of the specified point.
- Follow the displayed instruction.
- Enter the height of the target. Type the value manually or click the button with current target icon to select one of the previously used values from the context menu. Select Edit from the context menu to open the Targets dialog to add or modify target configurations.
- When ready, click
/
to take measurements. More...
- Repeat the routine for every required point. All the measured points are saved as design points in the current job. After the last point is measured, the Setup by Grid Lines Results dialog opens.
Click the EDM button in the dialog's title bar to open the associated drop-down menu with a set of total station functions and parameters that are frequently used and changed during field work.
Click
in the dialog's title bar to review and modify the survey settings. More...
Click
to open the dialog menu with additional options:
To review commands and options available in the Setup by Grid Lines dialog pop-up menu:
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