Use this dialog box to set the locations of control points for use in a rubbersheeting operation.
Method
Use this area to select the rubbersheeting method that best suits your image. After setting the control points, you can switch from one method to the other and preview the results before making a final decision.
- Triangular
-
Specifies the use of the triangular method.
- Polynomial
-
Specifies the use of the polynomial method.
- Degree
-
Used only with the polynomial method, to specify the polynomial degree, which affects the accuracy of the rubbersheet operation.
Control Point Table
- ID
-
Specifies the control point number.
- Error
-
Used only with the polynomial method, to specify the distance from the intended to the actual destination point after the rubbersheet operation. This distance is also known as the root-mean-square (RMS) error for the control point.
- Source Point
-
Specifies the coordinates of the source point in the image.
- Destination Point
-
Specifies the coordinates of the intended destination point, after the rubbersheet operation.
- Total RMS Error
-
Displays the total root-mean-square error for the set of control points.
Buttons
- Add Points <
-
Click to add pairs of source and destination points.
- Grid Points
-
Click to open the Grid Parameters Dialog Box and create a grid to use in the rubbersheeting operation.
- Delete
-
When a row is selected in the Control Point Table, click to delete the row.
- Repick <
-
When a row is selected in the Control Point Table, click to repick a pair of points.
- Zoom To <
-
When a row is selected in the Control Point Table, click to zoom in to the vicinity of the pair of control points.
- Preview
-
Click to preview the effects of a rubbersheet operation using the current settings.
- Import
-
Click to import a set of control points, saved in a text (.txt) file.
- Export
-
Click to export the existing points from the Control Point Table to an external text file.
- Auto Zoom
-
Specifies that the drawing window automatically zooms in to the vicinity of a particular pair of control points when they are selected in a repick operation.