encloses an area of the TIN surface designated as a hole.<br/>the boundary <i>LineStrings</i> of the <i>Polygon</i> behave as breaklines in that triangles in the <i>Patches</i> attribute of the <i>TIN</i> value must be adjusted so that becomes an edge of two or more triangles. Hole boundaries are treated like drape void boundaries in that the elevation of the original TIN surface The area bounded by TIN elements having a <i>'</i>break void', 'drape void', 'void' and 'hole' element type are still considered to be part of the TIN surface, rather than a hole bounded by an interior boundary of the surface. This distinction is significant when merging two TIN surfaces.<br/>
