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GEOVIA Surpac

Erase polygons

This function erases polygons which have been drawn with the DRAW Polygons function.

To run this function: Choose Display > Hide strings > With colour fill, or...

  • In the Function Chooser, type ERASE POLYGONS, and press ENTER.

Layer name

The name of the layer from which to erase the data. The active layer is provided as the default value. You can erase data from all graphics layers by leaving this field blank.

String range

The string range to be erased from the screen. The range must be a standard range specifier. You can leave the range blank to erase all strings in the layer.

Segment range

The segment range to be erased from the screen.

Seg pnt range

Enter the segment point range which is to be erased from the screen.

In the case of each of the ranges entered above, if the range is a blank then this signifies that all of a particular string, segment or segment points are to be erased. Therefore to erase all polygons simply choose Apply.

Desc field number

The entry in this field has no effect for this function.

Output

The specified strings and segments in the active layer are erased from the screen. The data is not deleted. You can draw the data at any time using any of the drawing functions.