Package net.opengis.gml311

Interface AffinePlacementType

  • All Superinterfaces:
    EObject, Notifier
    All Known Implementing Classes:
    AffinePlacementTypeImpl
    public interface AffinePlacementType
extends EObject
    A representation of the model object 'Affine Placement Type'. A placement takes a standard geometric construction and places it in geographic space. It defines a transformation from a constructive parameter space to the co-ordinate space of the co-ordinate reference system being used. Parameter spaces in formulae in this International Standard are given as (u, v) in 2D and(u, v, w) in 3D. Co-ordinate reference systems positions are given in formulae, in this International Standard, by either (x, y) in 2D, or (x, y, z) in 3D. Affine placements are defined by linear transformations from parameter space to the target co-ordiante space. 2-dimensional Cartesian parameter space,(u,v) transforms into 3-dimensional co- ordinate reference systems,(x,y,z) by using an affine transformation,(u,v)->(x,y,z) which is defined : x ux vx x0 u y = uy vy + y0 v x uz vz z0 Then, given this equation, the location element of the AffinePlacement is the direct position (x0, y0, z0), which is the target position of the origin in (u, v). The two reference directions (ux, uy, uz) and (vx, vy, vz) are the target directions of the unit vectors at the origin in (u, v).

    The following features are supported:

    See Also:
    Gml311Package.getAffinePlacementType()