land:surfFaceType

Represents a face on a 3D surface by referencing points from the Pnts collection"

The number of poitns are determined by the surfType attrinute: 3 for TIN, 4 for grid

Note: TIN is the acronym for "triangulated irregular network"

The point references are stored as a space delimited text value in the form of "id id id"

Example, "62 68 44" for TIN, ""62 68 44 71" for Grid