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matlab.io.hdfeos.gd.setTileComp

Namespace: matlab.io.hdfeos.gd

Set tiling and compression for field with fill value

Syntax

setTileComp(gridID,fieldname,tilesize,compCode,compParm)

Description

setTileComp(gridID,fieldname,tilesize,compCode,compParm) sets the tiling and compression for a field that had a fill value. This function must be applied after gd.defField and gd.setFillValue. The compCode argument can be one of the following values.

'rle'Run-length encoding
'skphuff'Skipping Huffman
'deflate'Deflate
'none'No compression

compParm need only be specified when the compression scheme is 'deflate', and then must be an integer between 0 and 9.

This function corresponds to the GDsettilecomp function in the HDF-EOS library C API, but because MATLAB® uses FORTRAN-style ordering, the tilesize parameter is reversed with respect to the C library API.

Examples

Define a temperature field with a 2-by-2 tiling scheme, a fill value of -999, and deflate compression. 

import matlab.io.hdfeos.*
gfid = gd.open('myfile.hdf','create');
upleft = [210584.50041 3322395.95445];
lowright = [813931.10959 2214162.53278];
gridID = gd.create(gfid,'UTMGrid',120,200,upleft,lowright);
spherecode = 0; zonecode = 40;
projparm = zeros(1,13);
gd.defProj(gridID,'utm',zonecode,spherecode,projparm);
gd.defDim(gridID,'Time',10);
gd.defField(gridID,'Pollution',{'XDim','YDim','Time'},'float');
gd.setFillValue(gridID,'Pollution',single(7));
gd.setTileComp(gridID,'Pollution',[40 20 1],'deflate',5);
gd.detach(gridID);
gd.close(gfid);

See Also

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