2D Rectified Grid in 2D CRS Method
urn:ogc:def:method:WCS:1.1:2dGridIn2dCrs
Method for use by a Coordinate Conversion defining a 2D GridCRS in a 2D baseCRS, based on CV_RectifiedGrid in ISO 19123 so the grid can be rotated and skewed in this baseCRS.
The reverse direction (from the grid CRS to the baseCRS) shall be as specified by the equations:
BaseX = origin(1) + offsets(1,1) * GridX + offsets(1,2) * GridY
BaseY = origin(2) + offsets(2,1) * GridX + offsets(2,2) * GridY
where
GridX, GridY are position coordinates in the grid 2D CRS
BaseX, BaseY are position coordinates in the 2D base CRS
origin(1), origin(2) are the two coordinates of the grid origin position in the 2D base CRS
offsets(1,1), offsets(1,2) are the grid point offsets of the first grid axis in the 2D base CRS
offsets(2,1), offsets(2,2) are the grid point offsets of the second grid axis in the 2D base CRS
The forward direction (from the baseCRS to the GridCRS) equations are not included here.
2
2
origin2d
urn:ogc:def:parameter:WCS:1.1:origin2d
This parameter shall be encoded as a wcs:Origin element, giving the two origin coordinates in the 2D base CRS of this GridCRS.
offsets2d
urn:ogc:def:parameter:WCS:1.1:offsets2d
This parameter shall be encoded as a wcs:Offsets element, giving the grid offsets in the two grid axes, each in the 2D base CRS relative to the specified origin. This wcs:Offsets shall contain four values, the first two values shall specify the grid offset for the first grid axis, and the second pair of values shall specify the grid offset for the second grid axis.