2D Rectified Grid in 3D CRS Method
urn:ogc:def:method:WCS:1.1:2dGridIn3dCrs
Method for use by a Coordinate Conversion defining a 2D GridCRS in a 3D baseCRS, based on CV_RectifiedGrid in ISO 19123 so the grid can be rotated and skewed in this baseCRS.
The reverse direction (from the GridCRS to the baseCRS) shall be as specified by the equations:
BaseX = origin(1) + offsets(1,1) * GridX + offsets(2,1) * GridY
BaseY = origin(2) + offsets(1,2) * GridX + offsets(2,2) * GridY
BaseZ = origin(3) + offsets(1,3) * GridX + offsets(2,3) * GridY
where
GridX, GridY are position coordinates in the 2D grid CRS
BaseX, BaseY, BaseZ are position coordinates in the 3D base CRS
origin(1), origin(2), origin(3) are the three coordinates of the grid origin position in the 3D base CRS
offsets(1,1),offsets(1,2), offsets(1,3) are the grid spacings of the first grid axis in the 3D base CRS
offsets(2,1), offsets(2,2), offsets(2,3) are the grid spacings of the second grid axis in the 3D base CRS
The forward direction (from the baseCRS to the GridCRS) equations are not included here.
3
2
origin3d
urn:ogc:def:parameter:WCS:1.1:origin3d
This parameter shall be encoded as a wcs:Origin element, giving the three origin coordinates in the 3D base CRS of this GridCRS.
offsets3d
urn:ogc:def:parameter:WCS:1.1:offsets3d
This parameter shall be encoded as a wcs:Offsets element, giving the grid offsets in the two grid axes, each in the 3D base CRS relative to the specified origin. This wcs:Offsets shall contain six values, the first three values shall specify the grid offset for the first grid axis, and the second three values shall specify the grid offset for the second grid axis.