The tool allows one to close NoData gaps in a grid by thin plate spline interpolation from cell values around the gaps.

Name	Type	Identifier	Description	Constraints
Input
Grid	grid, input	GRID	The input grid.
Mask	grid, input, optional	MASK	An optional mask grid. Masked cells are not closed.
Output
Closed Gaps Grid	grid, output, optional	CLOSED	The output grid.
Options
Maximum Gap Size	integer number	MAXGAPCELLS	The maximum gap size to be closed [number of cells]. Ignored if set to zero.	Minimum: 0 Default: 0
Maximum Points	integer number	MAXPOINTS	The maximum number of points used for spline interpolation [-].	Minimum: 2 Default: 1000
Number of Points for Local Interpolation	integer number	LOCALPOINTS	The number of nearest neighbours used for spline interpolation [-].	Minimum: 2 Default: 20
Extended Neighbourhood	boolean	EXTENDED	The extended neighbourhood not only includes the immediate neighbouring cells of a gap, but also their neighbours.	Default: 0
Neighbourhood	choice	NEIGHBOURS	The analysed neighbourhood, either the four cardinal neighbours or all eight neighbours.	Available Choices: [0] Neumann [1] Moore Default: 0
Radius	integer number	RADIUS	The nearest neighbour search radius [map units]. If zero, simply the nearest 'Number of Points for Local Interpolation' are used.	Minimum: 0 Default: 0
Relaxation	floating point number	RELAXATION	The regularization parameter controlling the amount of smoothing [-]. If the value is zero, exact interpolation is used.	Minimum: 0.000000 Default: 0.000000