matlab.io.hdfeos.gd

Low-level access to HDF-EOS grid data

Description

To use these MATLAB^® functions, you must be familiar with the HDF-EOS library C interface. In most cases, the syntax of the MATLAB function is similar to the syntax of the corresponding HDF-EOS library function. The functions are implemented as the namespace matlab.io.hdfeos.gd. To use this namespace, prefix the function name with a namespace path, or use the import function to add the namespace to the current import list, prior to calling the function, for example,

import matlab.io.hdfeos.*
gfid = gd.open(filename,'read');

Access

matlab.io.hdfeos.gd.attach	Attach to existing grid
matlab.io.hdfeos.gd.close	Close HDF-EOS grid file
matlab.io.hdfeos.gd.detach	Detach from existing grid
matlab.io.hdfeos.gd.open	Open grid file

Definition

matlab.io.hdfeos.gd.create	Create new grid structure
matlab.io.hdfeos.gd.defComp	Set grid field compression
matlab.io.hdfeos.gd.defDim	Define new dimension within grid
matlab.io.hdfeos.gd.defField	Define new data field within grid
matlab.io.hdfeos.gd.defOrigin	Define origin of pixels in grid
matlab.io.hdfeos.gd.defPixReg	Define pixel registration within grid
matlab.io.hdfeos.gd.defProj	Define grid projection
matlab.io.hdfeos.gd.writeBlkSomOffset	Write Block SOM offset

Basic I/O

matlab.io.hdfeos.gd.getFillValue	Fill value for specified field
matlab.io.hdfeos.gd.readAttr	Read grid attribute
matlab.io.hdfeos.gd.readField	Read data from grid field
matlab.io.hdfeos.gd.setFillValue	Set fill value for specified field
matlab.io.hdfeos.gd.writeAttr	Write grid attribute
matlab.io.hdfeos.gd.writeField	Write data to grid field

Inquiry

matlab.io.hdfeos.gd.compInfo	Compression information for field
matlab.io.hdfeos.gd.dimInfo	Length of dimension
matlab.io.hdfeos.gd.fieldInfo	Information about data field
matlab.io.hdfeos.gd.gridInfo	Position and size of grid
matlab.io.hdfeos.gd.inqAttrs	Names of grid attributes
matlab.io.hdfeos.gd.inqDims	Information about dimensions defined in grid
matlab.io.hdfeos.gd.inqFields	Information about data fields defined in grid
matlab.io.hdfeos.gd.inqGrid	Names of grids in file
matlab.io.hdfeos.gd.nEntries	Number of specified objects
matlab.io.hdfeos.gd.originInfo	Origin code
matlab.io.hdfeos.gd.pixRegInfo	Pixel registration code
matlab.io.hdfeos.gd.projInfo	GCTP projection information about grid
matlab.io.hdfeos.gd.readBlkSomOffset	Read Block SOM offset

Subsetting

matlab.io.hdfeos.gd.defBoxRegion	Define region of interest by latitude and longitude
matlab.io.hdfeos.gd.defVrtRegion	Define vertical subset region
matlab.io.hdfeos.gd.extractRegion	Read region of interest from field
matlab.io.hdfeos.gd.getPixValues	Read data values for specified pixels
matlab.io.hdfeos.gd.getPixels	Pixel rows and columns for latitude/longitude pairs
matlab.io.hdfeos.gd.interpolate	Bilinear interpolation on a grid field
matlab.io.hdfeos.gd.regionInfo	Information about subsetted region

Tiling

matlab.io.hdfeos.gd.defTile	Define tiling parameters
matlab.io.hdfeos.gd.readTile	Read single tile of data from field
matlab.io.hdfeos.gd.setTileComp	Set tiling and compression for field with fill value
matlab.io.hdfeos.gd.tileInfo	Tile size of grid field
matlab.io.hdfeos.gd.writeTile	Write tile to field

Utility

matlab.io.hdfeos.gd.ij2ll	Convert row and column space to latitude and longitude
matlab.io.hdfeos.gd.ll2ij	Convert latitude and longitude to row and column space
matlab.io.hdfeos.gd.sphereCodeToName	Name corresponding to GCTP sphere code
matlab.io.hdfeos.gd.sphereNameToCode	Numeric GCTP code corresponding to sphere name