Represents a vertical 3D polygon
| ||LineString3dOffset|| |
Represents the points that comprise the lower edge of the polygon, ordered from the leftmost point to rightmost, relative to an observer viewing the front face of the surface.
| ||RelativePointHeight||repeated|| |
The elevation in centimeters of the top edge of the polygon, relative to points on the lower edge's geometry. Missing index values assume the previous point's elevation. Additional redundant shape points are introduced to the bottom geometry to allow for all required top edge points.