dividePolys function

Divide a Single Polygon into Several Polygons

Divide a single polygon (with several outer-contour components) into several polygons, a polygon for each outer contour, by modifying the PID and SID indices.

dividePolys (polys)

Arguments

• polys: PolySet with one or more polygons, each with possibly several components/holes.

Details

Given the input PolySet , this function renumbers the PID

and SID indices so that each outer contour has a unique PID and is followed by all of its holes, identifying them with SIDs greater than one.

Returns

PolySet , possibly with the addition of an SID column if it did not already exist. The function may also reorder columns such that PID, SID, POS, X and Y appear first, in that order.

Author(s)

Nicholas M. Boers, Staff Software Engineer

Jobber, Edmonton AB

Last modified Rd: 2007-06-06

See Also

combinePolys.