Documentation for fieldgml

Super-types:	AbstractSurfacePatchType < AbstractParametricCurveSurfaceType (by extension) < AbstractGriddedSurfaceType (by extension)
Sub-types:	ConeType (by extension) CylinderType (by extension) SphereType (by extension)

Super-types:

AbstractSurfacePatchType < AbstractParametricCurveSurfaceType (by extension) < AbstractGriddedSurfaceType (by extension)

Sub-types:

ConeType (by extension)
CylinderType (by extension)
SphereType (by extension)

Name	AbstractGriddedSurfaceType
Abstract	no
Documentation	A gridded surface is a parametric curve surface derived from a rectangular grid in the parameter space. The rows from this grid are control points for horizontal surface curves; the columns are control points for vertical surface curves. The working assumption is that for a pair of parametric co-ordinates (s, t) that the horizontal curves for each integer offset are calculated and evaluated at "s". The defines a sequence of control points: cn(s) : s 1 .....columns From this sequence a vertical curve is calculated for "s", and evaluated at "t". In most cases, the order of calculation (horizontal-vertical vs. vertical-horizontal) does not make a difference. Where it does, the horizontal- vertical order shall be the one used. Logically, any pair of curve interpolation types can lead to a subtype of GriddedSurface. The following clauses define some most commonly encountered surfaces that can be represented in this manner.

Name

AbstractGriddedSurfaceType

Abstract

Documentation

A gridded surface is a parametric curve surface derived from a rectangular grid in the parameter space. The rows from this grid are control points for horizontal surface curves; the columns are control points for vertical surface curves. The working assumption is that for a pair of parametric co-ordinates (s, t) that the horizontal curves for each integer offset are calculated and evaluated at "s". The defines a sequence of control points: cn(s) : s 1 .....columns From this sequence a vertical curve is calculated for "s", and evaluated at "t". In most cases, the order of calculation (horizontal-vertical vs. vertical-horizontal) does not make a difference. Where it does, the horizontal- vertical order shall be the one used. Logically, any pair of curve interpolation types can lead to a subtype of GriddedSurface. The following clauses define some most commonly encountered surfaces that can be represented in this manner.

XML Instance Representation

<...>

<gml:row> [1..*]
Start Choice [1]

<gml:posList> ... </gml:posList> [1]

Start Group: gml:geometricPositionGroup [1..*]
Start Choice [1]

<gml:pos> ... </gml:pos> [1]

<gml:pointProperty> ... </gml:pointProperty> [1]

End Choice
End Group: gml:geometricPositionGroup
End Choice
</gml:row>

<gml:rows> integer </gml:rows> [0..1]

'The attribute rows gives the number of rows in the parameter grid.'

<gml:columns> integer </gml:columns> [0..1]

'The attribute columns gives the number of columns in the parameter grid.'

</...>

Diagram

Schema Component Representation

</sequence>

</extension>

</complexContent>

</complexType>

Generated by <oXygen/> XML Editor using a modified version of xs3p that adds schema diagrams and chunking support. Last modified:

Complex Type: AbstractGriddedSurfaceType

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