You are here: Menu Commands > Create > Polygons by > Outersection
GEOVIA Surpac

Polygons by outersection

This function allows you to create new closed segments by performing polygon outersection between two selected closed segments.

To run this function: Choose Create > Polygons by > Outersection, or...

  • In the Function Chooser, type OUTERSECT STRINGS, and press ENTER.

Press the relevant button on the DESCRIPTION FIELDS FOR RESULT STRING form to display the prompt:

Select the intersecting shape

Position the pointer and select a point which is on the intersecting segment.

At the prompt:

Select the shape to be intersected

Position the pointer and select a point which is on the intersected segment.

The OutersectStrings function will continue until the Cancel button is pressed.

The two closed segments are outersected to produce new closed segments. The new segments enclose the areas of the second segment which are not common with the first segment.

Add The new segments will use the design string number as their string number.
Change The two selected segments are deleted and replaced by the new segments. The original segments will only be deleted if they belong to the active layer.
Insert The new segments will have the string number of the intersecting shape as their string number.

String xxx segment yyy is closed direction is made Clockwise

This message advises you of the new segments which are created during execution of the function.

String xxx segment yyy is open. It must be closed to continue