Javadoc
Returns the value of the 'Grid Offsets' attribute.
Two or more grid position offsets from the grid origin in the GridBaseCRS of this GridCRS. Example: For the grid2dIn2dCRS OperationMethod, this Offsets element shall contain four values, the first two values shall specify the grid offset for the first grid axis in the 2D base CRS, and the second pair of values shall specify the grid offset for the second grid axis. In this case, the middle two values are zero for un-rotated and un-skewed grids.