Schema Central > NIEM 2.1 > geospatial.xsd > geo:ArcByCenterPoint
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geo:ArcByCenterPoint

A 2D arc defined by its center point, radius, and bearings at start and end.  This variant of the arc requires that the points on the arc shall be computed instead of storing the coordinates directly. The single control point is the center point of the arc plus the radius and the bearing at start and end. This representation can be used only in 2D. The element gml:radius specifies the radius of the arc. The element gml:startAngle specifies the bearing of the arc at the start. The element gml:endAngle specifies the bearing of the arc at the end. The interpolation is fixed as "circularArcCenterPointWithRadius". Since this type describes always a single arc, the attribute "numArc" is fixed to "1".

Element information

Type: geo:ArcByCenterPointType

Properties: Global, Qualified, Nillable

Content

Attributes

NameOccTypeDescriptionNotes
s:id [0..1]xsd:IDfrom type s:ComplexObjectType
s:metadata [0..1]xsd:IDREFSfrom type s:ComplexObjectType
s:linkMetadata [0..1]xsd:IDREFSfrom type s:ComplexObjectType

Sample instance

<geo:ArcByCenterPoint>
   <gml:ArcByCenterPoint numArc="1">
      <gml:pos>1.0 1.0</gml:pos>
      <gml:radius uom="">1.0</gml:radius>
      <gml:startAngle uom="">1.0</gml:startAngle>
      <gml:endAngle uom="">1.0</gml:endAngle>
   </gml:ArcByCenterPoint>
</geo:ArcByCenterPoint>

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