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Setup by Grid Lines
Setup by Grid Lines method allows you 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 method, 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.
The icon
brings up the Setup by Grid Lines dialog menu with additional options. More...
Setup by Grid Lines: Define Instrument setup
Set the occupied point:
- In Occupy, enter the name of the occupation point which position will be computed:
- For an unknown occupation point, type in a new point name.
- To recalculate coordinates of a known occupation, set the existing point in one of the following ways:
- Type in a known occupation point name.
- Choose a known occupation point from the map
. - Choose a known occupation point from the list
of job points in the open Points (Select Points From List) dialog.
- Set Code for the point:
- Enter or select a code for the point from the drop-down list. Depending on your selection another drop-down list may appear to set code string and control code.
- Alternatively, click the
Code button to open the Point Attributes dialog and select point codes as well as other point attributes (such as style, photo, note).
- Enter the height of the instrument (
HI) in the current units.
- Click Next to proceed in the Setup by Grid Lines: Specify Grid Lines dialog.
Setup by Grid Lines: Specify Grid Lines
Specify two known lines intersecting each other:
- Specify Line 1 and Line 2 in their respective groups.
- Use combinations of switching buttons to choose the way to enter the line parameters:
- Switch button to Line and select a line form the map
, choose either an existing line or line's start and end points. The field next to the button will show Line selected upon selection.
- Switch buttons to Start Point and End Point. Select each point by typing its name, selecting it from the map
or from the list
.
- Switch buttons to Start Point and Azimuth. Select start point by typing its name, selecting it from the map
or from the list
. Specify the line's direction by entering Azimuth and Grade.
- If Grid or Ground coordinate type is set in the Display dialog, a known line can be specified as parallel to one of the coordinate axes:
- Switch button to Northing to specify a parallel line and enter Northing coordinate and elevation for this line.
- Switch button to Easting to specify a meridian line and enter Easting coordinate and elevation for this line.
- From the drop-down list, select the instrument position relative to the Line 1 direction. Choose either Right of line or Left of line.
|
Position L is left of the line 1-2.
Position R is right of the line 1-2.
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- When both grid lines are specified, click Next to proceed in the Setup by Grid Lines: Measure Points dialog.
Setup by Grid Lines: Measure Points
Measure two points on each of two specified grid lines:
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.
- Type in the name of the point.
- Set Code for the point:
- Enter or select a code for the point from the drop-down list. Depending on your selection another drop-down list may appear to set code string and control code.
- Alternatively, click the
Code button to open the Point Attributes dialog and select point codes as well as other point attributes (such as style, photo, note).
- Click Next to proceed with measurement of the specified point.
- Follow the displayed instruction.
- Review the height of the reflector, enter a new value, if required. Type the value manually or click the button with current reflector icon to select one of the previously used values from the context menu. If prism is used as a target you can also quickly review or change its configuration: select Edit from the context menu to open the Prisms dialog.
- When ready, click
/
to take measurements. More...
- Go trough steps 1-5 for every required point. After the last point is measured the Setup by Grid Lines: Results dialog opens.
Setup by Grid Lines: Results
Review, accept and save the results of setup by grid lines.
The dialog displays the data collected from the performed measurements:
- BS: Check mark indicates that the point is used as BS (backsight) point. You can select
any point as backsight point;
- Point: the name of the point;
- Res HA: Difference of each HA measurement within the set from the average of all the HA's in the set;
- Res VA: Difference of each VA measurement within the set from the average of all the VA's in the set;
- Res SD: Difference of each SD measurement within the set from the average of all the SD's in the set;
- H: Check mark indicates that the horizontal coordinates of the point are used in the calculation;
- V: Check mark indicates that the vertical coordinate of the point is used in the calculation;
- HA, VA, SD: Check marks indicate that the Horizontal angle, Vertical angle and the Slope Distance are used in calculation;
- HR: The height of reflector;
- Target Type: Method of distance measurement with EDM (Prism, Sheet, Non-Prism or Long Non-Prism);
- PC: Prism constant for Topcon GTS-900/GPT-9000, QS, and IS instruments in the Robotic mode; and for Sokkia SX/PS, and DX/DS instruments in the in the Robotic and Motorized modes;
- HA: Horizontal Angle measurement within the corresponding set;
- VA: Vertical Angle measurement within the corresponding set;
- SD: Slope Distance measurement within the corresponding set;
- Set: The number of measurement set and the type of performed measurement.
If there is sufficient data to compute the setup by grid lines, the resection's results are displayed: standard deviations for coordinates and calculated scale factor.
Note: Grayed Scale Factor indicates that this resection will not affect the scale factor currently used in job.
Use the context menu to manage the list of performed measurement sets:
- Copy All To Clipboard - copies to clipboard the data of all the measurement sets in the list.
- Copy Selection To Clipboard - copies to clipboard the data of highlighted measurement sets.
- Edit - opens the Enter Rod Height dialog to edit the height of the reflector for a highlighted measurement set.
- Select All - highlights all the measurement sets from the list.
- Select All Below - highlights a currently highlighted measurement set and all the measurement sets in the list displayed below.
- Select Multiple - highlights multiple measurement sets by sequential clicking on data item names.
- Cancel Selection - removes all the highlights in the list.
Click
to save the results to a *.txt file.
Click
to return to Setup by Grid Lines: Measure Points and re-measure four required points.
Click Accept to open the Point Check dialog and save to the job the determined occupation point coordinates based on performed Setup by Grid Lines.
Setup by Grid Lines: Pop-up menu
Click
to open the Setup by Grid Lines dialog menu:
- Setup: click to expand the menu:
- PTL Mode - the coordinates of the measured points will be displayed from the specified reference line.
- Grid Lines - set up the grid to be displayed on the Map.
- Edit Points: opens the Points list to edit points.
- Inverse: opens the Two-Point Inverse calculation dialog.
- Robotic: click to expand the menu (available for Robotic survey configuration):
- Tilt opens the Remote Control Tilt dialog displaying the virtual bubble level of the connected total station.
- Remote Settings opens the dialog to configure the settings for the total station signal tracking. If a Topcon or Sokkia robotic total station is used, the Search/Track Parameters dialog opens.
- Config Link opens the Remote Connection dialog to view or modify configuration of remote connection of the instrument with the RC device and the data controller. This option will be enabled for IS Robot.
- Virtual Joystick if this option is selected, clicking
opens the Remote Control (Virtual Joystick) dialog, containing virtual joystick for total station rotation.
- Options: opens the Resection Options dialog.
- Raw Data - click to expand the menu:
- Add Raw Note allows you enter a Raw Note Text to give a description during the survey if required.
- View Last Point contains the information about the last point that has been logged since this dialog was opened.
- Edit - displays the collected raw data.
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