List of points defining a loop. There are no repeated points in the list. All data are global, with the assumption that positive Z is up, and if CADModelAzimuth is undefined or zero, positive X is East and positive Y is North. If CADModelAzimuth is defined it is the angle of positive Y to North, positive X is the vectorial product of Y and Z. If geometry is to be precise, use Longitude, Latitude and Elevation in the Location element to define the origin. Otherwise the origin is an arbitrary point. Use PlanarGeometry to define a three dimensional polygon that lies on a plane, and has no self-intersection. |