Spatial Filter Methods

The following methods control Named Spatial Filter objects. A Named Spatial Filter is an object which includes or excludes items based on their position and geometry.

Named Spatial Filter objects can be applied to overlays to control the visibility of the items in that overlay: only items which pass are drawn, all other items become temporarily invisible.

In addition, many SIS Desktop methods, e.g. Scan, accept a Named Spatial Filter as an argument.

Named Spatial Filter objects can be saved in, and loaded from, Named Object Libraries. Named Spatial Filter objects can be created, edited and set using the methods below.

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ChangeLocusTestMode	Changes geometrical test performed by named Spatial Filter object.
CombineLocus	Creates a named Spatial Filter by combining two named spatial filters using a Boolean operation.
CreateBufferFromItems	Creates a Polygon or QZone item surrounding the items in named list.
CreateBufferLocusFromItems	Creates a named buffer Spatial Filter around items in a named list.
CreateCircleLocus	Creates a named circular Spatial Filter.
CreateItemFromLocus	Creates an item from a named Spatial Filter.
CreateLocusFromItem	Creates a named Spatial Filter from the current open item.
CreateRectLocus	Creates a named rectangular Spatial Filter.
GetOverlayLocus	Gets a copy of an overlay drawing Spatial Filter.
LocusIntersect	Creates a named Spatial Filter by intersecting two existing loci.
SetOverlayLocus	Applies a copy of a named Spatial Filter to an overlay in the current SWD.

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