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HDF Reference Manual

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GR - Multifile General Raster Image Interface

GRattrinfo/mgatinf -- Retrieves information about an attribute.

GRcreate/mgcreat -- Creates a new raster image.

GRend/mgend -- Terminates the GR interface session.

GRendaccess/mgendac -- Terminates access to a raster image.

GRfileinfo/mgfinfo -- Retrieves the number of raster images and the number of global attributes in the file.

GRfindattr/mgfndat -- Finds the index of a data object's attribute given an attribute name.

GRgetattdatainfo -- Retrieves location and size of attribute's data. (H4 Mapping project specific)

GRgetattr/mggnatt/mggcatt -- Reads the values of an attribute for a data object.

GRgetchunkinfo/mggichnk -- Raster image identifier returned by GRcreate or GRselect

GRgetcompinfo/mggcompress -- Retrieves raster image data compression type and compression information.

GRgetdatainfo -- Retrieves location and size of data blocks in a specified raster image, starting at a specified block. (H4 Mapping project specific)

GRgetiminfo/mggiinf -- Retrieves general information about a raster image.

GRgetlutid/mggltid -- Gets the identifier of a palette given its index.

GRgetlutinfo/mgglinf -- Retrieves information about a palette.

GRgetnluts/mggnluts -- Retrieves the number of palettes for an image.

GRidtoref/mgid2rf -- Maps a raster image identifier to a reference number.

GRluttoref/mglt2rf -- Maps a palette identifier to a reference number.

GRnametoindex/mgn2ndx -- Maps the name of a raster image to an index.

GRreadchunk/mgrchnk/mgrcchnk -- Reads a data chunk from a chunked raster image (pixel-interlace only)

GRreadimage/mgrdimg/mgrcimg -- Raster image identifier returned by GRcreate or GRselect

GRreadlut/mgrdlut/mgrclut -- Reads a palette.

GRreftoindex/mgr2idx -- Maps the reference number of a raster image to an index.

GRreqimageil/mgrimil -- Specifies the interlace mode to be used in the subsequent raster image read operation(s).

GRreqlutil/mgrltil -- Specifies the interlace mode to be used in the next palette read operation(s).

GRselect/mgselct -- Selects the existing raster image.

GRsetaccesstype/mgsactp -- Sets the access for an RI to be either serial or parallel I/O.

GRsetattr/mgsnatt/mgscatt -- Assigns an attribute to a raster image or a file.

GRsetcompress/mgscompress -- Specifies if the raster image will be stored in a file as a compressed raster image.

GRsetchunk/mgschnk -- Makes a raster image a chunked raster image.

GRsetchunkcache/mgscchnk -- Specifies the maximum number of chunks to cache.

GRsetexternalfile/mgsxfil -- Specifies that the raster image will be written to an external file.

GRstart/mgstart -- Initializes the GR interface.

GRwritechunk/mgwchnk/mgwcchnk -- Writes a data chunk to a chunked raster image (pixel-interlace only)

GRwriteimage/mgwrimg/mgwcimg -- Writes a raster image.

GRwritelut/mgwrlut/mgwclut -- Writes a palette.

GR2bmapped -- Checks whether a raster image is to be mapped


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