Schema Central > NIEM 2.1 > geometryPrimitives.xsd > gml:Ring
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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".

Element information

Type: gml:RingType

Properties: Global, Qualified



aggregationType [0..1]gml:AggregationTypefrom group gml:AggregationAttributeGroup

Used in

Substitution hierarchy

Sample instance

      <gml:LineString gml:id="ID">
         <gml:identifier codeSpace="">string</gml:identifier>
         <gml:pos>1.0 1.0</gml:pos>

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