Breakline

reprrepresents a local ridge or depression in the TIN surface. When a breakline is specified for a <i>TIN</i> value, triangles in the <i>Patches</i> attribute of the <i>TIN</i> value must be adjusted so that no triangle is crossed by the breakline. The elevation along the breakline takes precedence over the elevation of the original TIN surface for the entire length of the breakline. During (re)triangulation, <i>Triangle </i>values in the vicinity of each breakline are adjusted so that, if the <i>Triangle</i> value intersects the <i>LineString</i> breakline value, then either: a) one of the <i>Point</i> values in the <i>ExteriorRing</i> attribute value of the <i>Triangle</i> value is spatially 3D equal to one of the <i>Point </i>values in the <i>Points</i> attribute of the <i>ST_LineString</i> value of the breakline, or b) two of the <i>Point</i> values in the <i>ExteriorRing</i> attribute of the <i>Triangle</i> value are spatially 3D equal to two consecutive <i>Point</i> values in the <i>Points</i> triangle lies along the breakline.