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16.5.3.2 Spatial Operators »
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16.5.3.1. Geometry Functions That Produce New Geometries

項16.5.2. 「Geometry Functions」, discusses several functions that construct new geometries from existing ones. See that section for descriptions of these functions:

  • Envelope(g)

  • StartPoint(ls)

  • EndPoint(ls)

  • PointN(ls,N)

  • ExteriorRing(poly)

  • InteriorRingN(poly,N)

  • GeometryN(gc,N)