gml:exterior

A boundary of a surface consists of a number of rings. In the normal 2D case, one of these rings is distinguished as being the exterior boundary. In a general manifold this is not always possible, in which case all boundaries shall be listed as interior boundaries, and the exterior will be empty.

Element information

Content

• Choice [1..1]
  from subst. group gml:AbstractRing
  gml:LinearRing    A LinearRing is defined by four or more coordinate tuples, with linear interpolation between them; the first and last coordinates shall be coincident. The number of direct positions in the list shall be at least four.
  gml:Ring    A ring is used to represent a single connected component of a surface boundary as specified in ISO 19107:2003, 6.3.6. Every gml:curveMember references or contains one curve, i.e. any element which is substitutable for gml:AbstractCurve. In the context of a ring, the curves describe the boundary of the surface. The sequence of curves shall be contiguous and connected in a cycle. If provided, the aggregationType attribute shall have the value "sequence".

Attributes

None

Used in

• Type gml:PolygonPatchType (Element gml:PolygonPatch)
• Type gml:PolygonType (Element gml:Polygon)
• Type gml:RectangleType (Element gml:Rectangle)
• Type gml:TriangleType (Element gml:Triangle)

Sample instance

<gml:exterior>
   <gml:LinearRing>
      <gml:pos>1.0 1.0</gml:pos>
   </gml:LinearRing>
</gml:exterior>