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Attributes
Diagrams
Instances
Properties
Source
Element gml:Bezier
Namespace http://www.opengis.net/gml
Diagram
Diagram index110.tmp#id186 index110.tmp#id187 index110.tmp#id188 index110.tmp#id185 index130.tmp#id653 index130.tmp#id654 index130.tmp#id655 index81.tmp#id71 index82.tmp#id189 index83.tmp#id193 index85.tmp#id194 index86.tmp#id72 index130.tmp#id651 index130.tmp#id652 index130.tmp#id650 index487.tmp#id660 index487.tmp#id661 index487.tmp#id662 index81.tmp#id71 index82.tmp#id189 index83.tmp#id193 index85.tmp#id194 index86.tmp#id72 index487.tmp#id658 index487.tmp#id659 index487.tmp#id657
Type gml:BezierType
Type hierarchy
Properties
content: complex
Model (gml:pos | gml:pointProperty | gml:pointRep | gml:posList | gml:coordinates) , gml:degree , gml:knot{2,2}
Children gml:coordinates, gml:degree, gml:knot, gml:pointProperty, gml:pointRep, gml:pos, gml:posList
Instance
<gml:Bezier interpolation="polynomialSpline" isPolynomial="true" numDerivativeInterior="0" numDerivativesAtEnd="0" numDerivativesAtStart="0">
  <gml:pos axisLabels="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:pos>
  <gml:pointProperty xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{1,1}</gml:pointProperty>
  <gml:pointRep xlink:actuate="" xlink:arcrole="" xlink:href="" gml:remoteSchema="" xlink:role="" xlink:show="" xlink:title="" xlink:type="simple">{1,1}</gml:pointRep>
  <gml:posList axisLabels="" count="" srsDimension="" srsName="" uomLabels="">{1,1}</gml:posList>
  <gml:coordinates cs="," decimal="." ts=" ">{1,1}</gml:coordinates>
  <gml:degree>{1,1}</gml:degree>
  <gml:knot>{2,2}</gml:knot>
</gml:Bezier>
Attributes
QName Type Fixed Default Use Annotation
interpolation gml:CurveInterpolationType polynomialSpline optional
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 a Bezier the interpolation is fixed as "polynomialSpline".
isPolynomial boolean true optional
The attribute isPolynomial is set to true as this is a polynomial spline.
numDerivativeInterior integer 0 optional
The attribute "numDerivativesInterior" specifies the type of continuity that is guaranteed interior to the curve. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity.
NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtEnd integer 0 optional
The attribute "numDerivativesAtEnd" specifies the type of continuity between this curve segment and its successor. If this is the last curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity.
NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
numDerivativesAtStart integer 0 optional
The attribute "numDerivativesAtStart" specifies the type of continuity between this curve segment and its predecessor. If this is the first curve segment in the curve, one of these values, as appropriate, is ignored. The default value of "0" means simple continuity, which is a mandatory minimum level of continuity. This level is referred to as "C 0 " in mathematical texts. A value of 1 means that the function and its first derivative are continuous at the appropriate end point: "C 1 " continuity. A value of "n" for any integer means the function and its first n derivatives are continuous: "C n " continuity.
NOTE: Use of these values is only appropriate when the basic curve definition is an underdetermined system. For example, line string segments cannot support continuity above C 0 , since there is no spare control parameter to adjust the incoming angle at the end points of the segment. Spline functions on the other hand often have extra degrees of freedom on end segments that allow them to adjust the values of the derivatives to support C 1 or higher continuity.
Source
<element name="Bezier" type="gml:BezierType" substitutionGroup="gml:BSpline"/>
Schema location http://schemas.opengis.net/gml/3.1.1/base/geometryPrimitives.xsd