pdstemplates.h File Reference

This include file contains info on all the available GRIB2 Product Definition Templates used in [Section 4 - the Product Definition Section (PDS)](https://www.nco.ncep.noaa.gov/pmb/docs/grib2/grib2_doc/grib2_sect4.shtml). More...

#include "grib2.h"

Go to the source code of this file.

Data Structures
struct	pdstemplate
	Struct for PDS template. More...

Macros
#define	MAXPDSMAPLEN   200
	Maximum template map length. More...
#define	MAXPDSTEMP   47
	Maximum number of templates. More...

Variables
const struct pdstemplate	templatespds [MAXPDSTEMP]
	Date for struct for PDS template. More...

Detailed Description

This include file contains info on all the available GRIB2 Product Definition Templates used in [Section 4 - the Product Definition Section (PDS)](https://www.nco.ncep.noaa.gov/pmb/docs/grib2/grib2_doc/grib2_sect4.shtml).

Each Template has three parts:

1. The number of entries in the template (mappdslen).
2. A map of the template (mappds), which contains the number of octets in which to pack each of the template values.
3. A logical value (needext) that indicates whether the Template needs to be extended. In some cases the number of entries in a template can vary depending upon values specified in the "static" part of the template. (See Template 4.3 as an example).

Note

Array mappds contains the number of octets in which the corresponding template values will be stored. A negative value in mappds is used to indicate that the corresponding template entry can contain negative values. This information is used later when packing (or unpacking) the template data values. Negative data values in GRIB are stored with the left most bit set to one, and a negative number of octets value in mappds[] indicates that this possibility should be considered. The number of octets used to store the data value in this case would be the absolute value of the negative value in mappds.

Program History Log

Date	Programmer	Comments
2005-12-08	Gilbert	Allow negative scale factors, limits for 4.5 and 4.9
2009-12-15	Vuong	Added Product Definition Templates 4.31, 4.15
2010-08-03	Vuong	Added Product Definition Template 4.40,4.41,4.42,4.43
2010-12-08	Vuong	Corrected Definition Template 4.42,4.43
2010-12-08	Vuong	Corrected Definition Template 4.42,4.43
2012-03-29	Vuong	Added Templates 4.44,4.45,4.46,4.47,4.48,4.50,4.51,4.91,4.32 and 4.52
2013-08-05	Vuong	Corrected 4.91 and added Templates 4.33,4.34,4.53,4.54
2015-10-07	Vuong	Added Templates 4.57, 4.60, 4.61 and allow a forecast time to be negative

Author

Stephen Gilbert

Date

2005-12-08

Definition in file pdstemplates.h.

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Data Type Documentation

pdstemplate

struct pdstemplate

Struct for PDS template.

Definition at line 53 of file pdstemplates.h.

Data Fields
g2int	mappds[MAXPDSMAPLEN]	Number of bytes for each template value.
g2int	mappdslen	The number of entries in the template.
g2int	needext	Does template need extension?
g2int	template_num	Template number.

Macro Definition Documentation

MAXPDSMAPLEN

#define MAXPDSMAPLEN   200

Maximum template map length.

Definition at line 48 of file pdstemplates.h.

MAXPDSTEMP

#define MAXPDSTEMP   47

Maximum number of templates.

Definition at line 47 of file pdstemplates.h.

Variable Documentation

templatespds

const struct pdstemplate templatespds[MAXPDSTEMP]

Date for struct for PDS template.

Definition at line 1 of file pdstemplates.h.

Referenced by getpdsindex(), and getpdstemplate().