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scat2d and scat3d perform interpolation of scattered data. An input data file, containing both locations at which data is known and the data itself, is read. The points are triangulated (as part of a larger Cartesian box); swapping is performed to obtain reasonable connectivity. A tree structure containing the data points is constructed to facilitate interpolation. A second set of points is read in; these are the target locations for the interpolation. Data is interpolated to these points and written out. For file formats, see Section 3.9.
The command line arguments for scat2d and scat3d are:
This argument is mandatory and specifies the stem for all file names used by the program. The input file containing the data to be interpolated is basefilename.data; the input file containing locations to which to interpolate the data is basefilename.points; the optional output volume mesh file is basefilename.vmesh.out; the message file is basefilename.msg; and the output file for interpolated data is basefilename.out.