gml:PolygonPatch 

A gml:PolygonPatch is a surface patch that is defined by a set of boundary curves and an underlying surface to which these curves adhere. The curves shall be coplanar and the polygon uses planar interpolation in its interior. 
interpolation is fixed to "planar", i.e. an interpolation shall return points on a single plane. The boundary of the patch shall be contained within that plane.

Element Information

Model

gml:exterior{0,1} , gml:interior*
Children: gml:exterior, gml:interior

Attributes

QName Type Fixed Default Use Inheritable Annotation
interpolation gml:SurfaceInterpolationType planar optional

Source 

<element name="PolygonPatch" type="gml:PolygonPatchType" substitutionGroup="gml:AbstractSurfacePatch">
  <annotation>
    <documentation>A gml:PolygonPatch is a surface patch that is defined by a set of boundary curves and an underlying surface to which these curves adhere. The curves shall be coplanar and the polygon uses planar interpolation in its interior. interpolation is fixed to "planar", i.e. an interpolation shall return points on a single plane. The boundary of the patch shall be contained within that plane.</documentation>
  </annotation>
</element>

Sample