Documentation for Geography Markup Language
Definition Type: ComplexType
Name: ArcByCenterPointType
Namespace: http://www.opengis.net/gml
Type: gml:AbstractCurveSegmentType
Containing Schema: geometryPrimitives.xsd
Abstract
Documentation:
This variant of the arc requires that the points on the arc have to be computed instead of storing the coordinates directly. The control point is the center point of the arc plus the radius and the bearing at start and end. This represenation can be used only in 2D.
Collapse XSD Schema Diagram:
Drilldown into endAngle in schema geometryprimitives_xsd Drilldown into startAngle in schema geometryprimitives_xsd Drilldown into radius in schema geometryprimitives_xsd Drilldown into coordinates in schema geometrybasic0d1d_xsd Drilldown into pointRep in schema geometrybasic0d1d_xsd Drilldown into pos in schema geometrybasic0d1d_xsd Drilldown into numDerivativeInterior in schema geometryprimitives_xsd Drilldown into numDerivativesAtEnd in schema geometryprimitives_xsd Drilldown into numDerivativesAtStart in schema geometryprimitives_xsd Drilldown into AbstractCurveSegmentType in schema geometryprimitives_xsd Drilldown into numArc in schema geometryprimitives_xsd Drilldown into interpolation in schema geometryprimitives_xsdXSD Diagram of ArcByCenterPointType in schema geometryprimitives_xsd (Geography Markup Language)
Collapse XSD Schema Code: 
<complexType name="ArcByCenterPointType">
    <annotation>
        <documentation>
				This variant of the arc requires that the points on the arc have to be computed instead of storing the coordinates directly. The control point is the center point of the arc plus the radius and the bearing at start and end. This represenation can be used only in 2D.
			</documentation>
    </annotation>
    <complexContent>
        <extension base="gml:AbstractCurveSegmentType">
            <sequence>
                <choice>
                    <annotation>
                        <documentation>GML supports two different ways to specify the control points of a curve segment.
1. A "pos" (DirectPositionType) or "pointRep" (PointPropertyType) element. The "pos" element contains a center point that is only part of this curve segment, a "pointRep" element contains a point that may be referenced from other geometry elements or reference another point defined outside of this curve segment (reuse of existing points).
2. The "coordinates" element can be used to specifiy the coordinates of the center point, too. The number of direct positions in the coordinate list must be one.</documentation>
                    </annotation>
                    <choice>
                        <element ref="gml:pos" />
                        <element ref="gml:pointRep" />
                    </choice>
                    <element ref="gml:coordinates" />
                </choice>
                <element name="radius" type="gml:LengthType">
                    <annotation>
                        <documentation>The radius of the arc.</documentation>
                    </annotation>
                </element>
                <element name="startAngle" type="gml:AngleType" minOccurs="0">
                    <annotation>
                        <documentation>The bearing of the arc at the start.</documentation>
                    </annotation>
                </element>
                <element name="endAngle" type="gml:AngleType" minOccurs="0">
                    <annotation>
                        <documentation>The bearing of the arc at the end.</documentation>
                    </annotation>
                </element>
            </sequence>
            <attribute name="interpolation" type="gml:CurveInterpolationType" fixed="circularArcCenterPointWithRadius">
                <annotation>
                    <documentation>The attribute "interpolation" specifies the curve interpolation mechanism used for this segment. This mechanism
uses the control points and control parameters to determine the position of this curve segment. For an ArcByCenterPoint the interpolation is fixed as "circularArcCenterPointWithRadius".</documentation>
                </annotation>
            </attribute>
            <attribute name="numArc" type="integer" use="required" fixed="1">
                <annotation>
                    <documentation>Since this type describes always a single arc, the attribute is fixed to "1".</documentation>
                </annotation>
            </attribute>
        </extension>
    </complexContent>
</complexType>
Collapse Child Elements:
Name Type Min Occurs Max Occurs
pos gml:pos (1) (1)
pointRep gml:pointRep (1) (1)
coordinates gml:coordinates (1) (1)
radius gml:radius (1) (1)
startAngle gml:startAngle 0 (1)
endAngle gml:endAngle 0 (1)
Collapse Child Attributes:
Name Type Default Value Use
numDerivativesAtStart gml:numDerivativesAtStart 0 Optional
numDerivativesAtEnd gml:numDerivativesAtEnd 0 Optional
numDerivativeInterior gml:numDerivativeInterior 0 Optional
interpolation gml:interpolation (Optional)
numArc gml:numArc Required
Collapse Derivation Tree:
Collapse References:
gml:ArcByCenterPointgml:CircleByCenterPointType,
Documentation for Geography Markup Language

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