gml:ArcByBulge 

An ArcByBulge is an arc string with only one arc unit, i.e. two control points, one bulge and one normal vector.
As arc is an arc string consisting of a single arc, the attribute "numArc" is fixed to "1".

Element Information

Model

(gml:pos | gml:pointProperty | gml:pointRep | gml:posList | gml:coordinates) , gml:bulge , gml:normal
Children: gml:bulge, gml:coordinates, gml:normal, gml:pointProperty, gml:pointRep, gml:pos, gml:posList

Attributes

QName Type Fixed Default Use Inheritable Annotation
interpolation gml:CurveInterpolationType circularArc2PointWithBulge optional
numArc integer 1 optional
numDerivativeInterior integer 0 optional
numDerivativesAtEnd integer 0 optional
numDerivativesAtStart integer 0 optional

Source 

<element name="ArcByBulge" type="gml:ArcByBulgeType" substitutionGroup="gml:ArcStringByBulge">
  <annotation>
    <documentation>An ArcByBulge is an arc string with only one arc unit, i.e. two control points, one bulge and one normal vector. As arc is an arc string consisting of a single arc, the attribute "numArc" is fixed to "1".</documentation>
  </annotation>
</element>

Sample