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Missing Line
To find or to verify the distance (horizontal, vertical, and slope distances) between two points (which usually have no direct visibility between them) by measuring them from the third point which has two given points in the direct visibility.
The Missing Line emulates the total station measurement from one point to another actually measuring these two points from the third point. The result is stored in the Raw Data database as the MLM type of measurement and marked with
icon in the list.
MAGNET Field offers two ways to use Missing Line feature: to measure the distance between two points that have an obstruction between them (clear the Check Measurement box) and to find the difference from the calculated distance between two known points and measured distance between these two points (select the Check Measurement box).
In the Ref Line tab, enter the data for missing line measurement and perform measurement.
- In the Method field, select either radial mode (A-B, A-C), or continuous mode (A-B, B-C) mode for missing line measurement.
- If the Check Measurement box is cleared, use missing line measurement to calculate the distance between two points:
- In the Start Point field, specify a starting point for missing line measurement. Enter an existing point name manually, or select from the map
or from the list
of job points. Alternatively, you can measure a new point, click
to open the Sideshot dialog. After saving the measured point to the current job, this point is instantly entered to the corresponding field.
- In the End Point field, specify an ending point for missing line measurement. Enter an existing point name manually, or select from the map
or from the list
of job points. Alternatively, you can measure a new point, click
to open the Sideshot dialog. After saving the measured point to the current job, this point is instantly entered to the corresponding field.
- Click the Calc button to find the distance between two entered points. If these points were known job points the distance is calculated based on points data. If they were new points measured by a total station, the distance is calculated based on missing line measurement data. The Data tab opens and displays the result of missing line measurement.
- If the Check Measurement box is selected, use missing line measurement to find the difference between the calculated distance and measured distance between two points:
- In the Start Point field, specify a starting point for missing line measurement. Enter an existing point name manually, or select from the map
or from the list
of job points. Then click
to open the Sideshot dialog and measure the specified point. After saving the measured point, the measured data is added as the check point for the specified point and used to find the difference between calculated and measured distances.
- In the End Point field, specify an ending point for missing line measurement. Enter an existing point name manually, or select from the map
or from the list
of job points. Then click
to open the Sideshot dialog and measure the specified point. After saving the measured point, the measured data is added as the check point for the specified point and used to find the difference between calculated and measured distances.
- Click the Calc button to find the distance between two measured points and find the difference between calculated and measured distances. The Data tab opens and displays the result of missing line measurement.
Use the Data and Map tabs to review the results of the Missing Line calculation:
- Review the Missing Line calculation results:
- Start Point - the name of the first point for missing line measurement.
- End Point - the name of the second point for missing line measurement.
- dHD - the horizontal distance between the start and end point.
- dVD - the vertical distance between the start and end point.
- dSD - the slope distance between the start and end point.
- Diff_HDist - the difference between the horizontal distances resulted from point coordinates and from performed measurements (available if the Check Measurement box was selected).
- Diff_VDist - the difference between the vertical distances resulted from point coordinates and from performed measurements (available if the Check Measurement box was selected).
- Diff_SDist - the difference between the slope distances resulted from point coordinates and from performed measurements (available if the Check Measurement box was selected).
- The occupation setup is also included in the results.
- Click
to export the results to a *.txt file.
- Open the Map tab to view the results graphically in the horizontal plane showing the start point, end point and the line between them.
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