Geometric Control – Point Difference¶
Use this dialog to compare two coordinate sets for a point and calculate the deviation between the measured and theoretical positions.
Where can I find the dialog?¶
Right-click in the horizontal list field for points, and select Geometric Control - Point Difference...
Prerequisites¶
To perform a point difference analysis, you need:
Requirements for application layers
- An application layer with measured points (observed positions)
- An application layer with theoretical points (reference values/"ground truth")
Procedure¶
Procedure
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Select the points in the application layer with the measured points you want to analyze for deviation.
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Right-click and select Geometric Control - Point Difference...
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Select the application layer with the theoretical points ("ground truth") you want to compare with.
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Choose the method for finding corresponding points.
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Enter tolerance requirements for acceptable deviations.
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Click OK to perform the control.
Results¶
The calculation results are presented in three ways:
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Horizontal list window: Numeric values for each point
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Excel report: Detailed point difference report
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Graphical representation: Visual display in plan and 3D view
More information
You can read more about geometric control in the user documentation.