Creates a Named Seed object by doing a fast Boolean operation with existing TopoPolygon Items.
| Visual Basic | 
|---|
| Public Function TopoCreateBoolean( _ ByVal seed As String, _ ByVal list As String, _ ByVal boolop As Integer _ ) As Integer | 
| 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. | 
Available: GEO ME MD OD SISpy
Group:
sis.TopoCreateBoolean ("County", "PolysFound", SIS_BOOLEAN_DIFF)
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