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matlab.io.hdfeos.gd.readBlkSomOffset

Package: matlab.io.hdfeos.gd

Read Block SOM offset

Syntax

offset = readBlkSomOffset(GID)

Description

offset = readBlkSomOffset(GID) reads the block SOM offset values, in pixels, from a standard SOM (Space Oblique Mercator) projection. offset is a vector of offset values for SOM projection data. This routine can only be used with grids that use the SOM projection.

This function corresponds to the GDblkSOMoffset function in the HDF-EOS library C API.

Examples

import matlab.io.hdfeos.*
gfid = gd.open('myfile.hdf','create');
lowright = [30521379.68485 1152027.64253];
upleft = [-11119487.42844 8673539.24806];
gridID = gd.create(gfid,'SOM',120,60,upleft,lowright);
projparm(1) = 6378137;
projparm(2) = 0.006694348;
projparm(4) = 98096360;  % 98.161 in DDDMMMSSS
projparm(5) = 87069061;  % 87.112 in DDDMMMSSS
projparm(9) = 0.068585416*1440;
projparm(10) = 0.0;
projparm(12) = 6;
gd.defProj(gridID,'som',[],[],projparm);
gd.writeBlkSomOffset(gridID,[5 10 12 8 2]);
gd.detach(gridID);
gd.close(gfid);
gfid = gd.open('myfile.hdf');
gridID = gd.attach(gfid,'SOM');
blk = gd.readBlkSomOffset(gridID);
gd.detach(gridID);
gd.close(gfid);