All Cadcorp SIS API Methods

TopoCreateBoolean Method

Description

Creates a Named Seed object by doing a fast Boolean operation with existing TopoPolygon Items.

Syntax

Public Function TopoCreateBoolean( _
   ByVal seed As String, _
   ByVal list As String, _
   ByVal boolop As Integer _
) As Integer

Parameters

seed

The new Named Seed object, which will be a TopoPolygon item.

 

list

A Named List containing the TopoPolygon Items, which must all be in the same dataset, to combine.

 

boolop

SIS_BOOLEAN_AND	Get the overlap Named Seed between the TopoPolygon Items in list.
SIS_BOOLEAN_OR	Merge the TopoPolygon Items in list into a single Named Seed object.
SIS_BOOLEAN_XOR	Form the Named Seed made up of alternate overlapping sub-areas of the TopoPolygon Items in list.
SIS_BOOLEAN_DIFF	Take bites out of the dominant TopoPolygon in list using the other TopoPolygon Items in list.

Remarks

Available: GEO D OD SISpy

Group:

• Topology Methods

Example

sis.TopoCreateBoolean ("County", "PolysFound", SIS_BOOLEAN_DIFF)