Rubber Sheeting

Question

Hi Every Body ,
Can any body help me how to implement the Rubber Sheeting in Oracle Spatial 11G.

Answer 1

Hi,-
You are most welcome.
If you have SDO_GEOMETRY which you could in your case with line geometries, you can use our Affine Transform function to do rubber sheeting. The only thing is that you need to know what kind of transform you need to use.
Please let us know if you need further help with affine transforms i.e., SDO_UTIL.AFFINETRANSFORMS
Best regards
baris
SDO_UTIL.AFFINETRANSFORMS(
     geometry IN SDO_GEOMETRY,
     translation IN VARCHAR2,
     tx IN NUMBER,
     ty IN NUMBER,
     tz IN NUMBER,
     scaling IN VARCHAR2,
     psc1 IN SDO_GEOMETRY
     sx IN NUMBER,
     sy IN NUMBER,
     sz IN NUMBER,
     rotation IN VARCHAR2,
     p1 IN SDO_GEOMETRY,
     line1 IN SDO_GEOMETRY,
     angle IN NUMBER,
     dir IN NUMBER,
     shearing IN VARCHAR2
     shxy IN NUMBER,
     shyx IN NUMBER,
     shxz IN NUMBER,
     shzx IN NUMBER,
     shyz IN NUMBER,
     shzy IN NUMBER,
     reflection IN VARCHAR2
     pref IN SDO_GEOMETRY,
     lineR IN SDO_GEOMETRY,
     dirR IN NUMBER,
     planeR IN VARCHAR2,
     n IN SDO_NUMBER_ARRAY,
     bigD IN SDO_NUMBER_ARRAY,
     ) RETURN SDO_GEOMETRY;
Description
Returns a geometry that reflects an affine transformation of the input geometry.
Parameters
geometry
    Input geometry on which to perform the affine transformation.
translation
    A string value of TRUE causes translation to be performed; a string value of FALSE causes translation not to be performed. If this parameter is TRUE, translation is performed about the point at (tx,ty) or (tx,ty,tz).
tx
    X-axis value for translation.
ty
    Y-axis value for translation.
tz
    Z-axis value for translation.
scaling
    A string value of TRUE causes scaling to be performed; a string value of FALSE causes scaling not to be performed.
psc1
    Point on the input geometry about which to perform the scaling. If scaling is TRUE, this geometry should be either a zero point (point geometry with 0,0 or 0,0,0 ordinates for scaling about the origin) or a nonzero point (point geometry with ordinates for scaling about a point other than the origin). If scaling is FALSE, psc1 can be a null value.
sx
    X-axis value for scaling (about either the point specified in the psc1 parameter or the origin).
sy
    Y-axis value for scaling (about either the point specified in the psc1 parameter or the origin).
sz
    Z-axis value for scaling (about either the point specified in the psc1 parameter or the origin).
rotation
    A string value of TRUE causes rotation to be performed; a string value of FALSE causes rotation not to be performed.
    For two-dimensional geometries, rotation uses the p1 and angle values. For three-dimensional geometries, rotation uses either the angle and dir values or the line1 and angle values.
p1
    Point for two-dimensional geometry rotation about a specified point.
line1
    Line for rotation about a specified axis.
angle
    Angle rotation parameter for rotation about a specified axis or about the X, Y, or Z axis.
dir
    Rotation parameter for x(0), y(1), or z(2)-axis roll. If the rotation parameter value is TRUE but the dir parameter is not used, specify a value of -1.
shearing
    A string value of TRUE causes shearing to be performed; a string value of FALSE causes shearing not to be performed.
    For two-dimensional geometries, shearing uses the shxy and shyx parameter values. For three-dimensional geometries, shearing uses the shxy, shyx, shxz, shzx, shyz, and shzy parameter values.
shxy
    Value for shearing due to X along the Y direction.
shyx
    Value for shearing due to Y along the X direction.
shxz
    Value for shearing due to X along the Z direction (three-dimensional geometries only).
shzx
    Value for shearing due to Z along the X direction (three-dimensional geometries only).
shyz
    Value for shearing due to Y along the Z direction (three-dimensional geometries only).
shzy
    Value for shearing due to Z along the Y direction (three-dimensional geometries only).
reflection
    A string value of TRUE causes reflection to be performed; a string value of FALSE causes reflection not to be performed.
    For two-dimensional geometries, reflection uses the lineR value for reflection about an axis and the pref value for the centroid for self-reflection. For three-dimensional geometries, reflection uses the lineR value for reflection about an axis; the dirR value for reflection about the yz, xz, and xy planes; the planeR, n, and bigD values for reflection about a specified plane; and the pref value for the centroid for self-reflection.
pref
    Point through which to perform reflection.
lineR
    Line along which to perform reflection.
dirR
    Number indicating the plane about (through) which to perform reflection: 0 for the yz plane, 1 for the xz plane, or 2 for the xy plane. If the reflection parameter value is TRUE but the dirR parameter is not used, specify a value of -1.
planeR
    A string value of TRUE causes reflection about an arbitrary plane to be performed; a string value of FALSE causes reflection about an arbitrary plane not to be performed.
n
    Normal vector of the plane.
bigD
    Delta value for the plane equation in three-dimensional geometries.
    For three-dimensional geometries, bigD = delta and n = (A,B,C) where n is the normal of the plane in three-dimensional space. Thus, the plane equation is:
    Ax+By+Cz+bigD = 3DDotProd(n,anypointonplane)+bigD = 0