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HOME > Monitoring_and_Data > Oceanic and Atmospheric Data > Reanalysis: Atmospheric Data > wgrib2-set_pdt
 

wgrib2: -set_pdt

Introduction

Section 4 contains the product definition and the product is defined through the product definition template (PDT). There are many different PDTs but only some are in common usage. The -set_pdt option changes the current PDT to another. For example, you want to add ensemble information to a forecast with not ensemble information. To do this, you have to change the template to one that has ensemble information. Another use of the -set_pdt option is to convert an unsupported PDT to a supported PDT or vice versa. To retain metadata, prefix the PDT with a plus sign. The amount of metadata copied depends on the version of wgrib2.

Usage

-set_pdt X      X=product defintion template number, default size, PDT is cleared
-set_pdt +X     X=product defintion template number, copy metadata from current PDT
                  size may vary depending on current PDT
-set_pdt X:Y    X=product defintion template number, Y=byte size of PDT if variable-sized PDT
                  PDT is cleared
-set_pdt +X:Y   X=product defintion template number, Y=byte size of PDT if variable-sized PDT
                  copy metadata
                Note: using the wrong value of Y can produce errors

Example

wgrib2 prior to v2.0.2
$ wgrib2 p.grb -set_pdt 0
1:0:d=2010111618:var discipline=0 center=7 local_table=0 parmcat=255 parm=255:no_level:-1 missing fcst:
$ wgrib2 p.grb -set_pdt +0
1:0:d=2010111618:PRMSL:no_level:-1 missing fcst:

wgrib2 v2.0.2
$ wgrib2 png.grb
1:4:d=2009060500:RH:2 m above ground:330 hour fcst:std dev
$ wgrib2 png.grb -set_pdt 0
1:4:d=2009060500:var discipline=0 center=7 local_table=1 parmcat=255 parm=255:no_level:-1 missing fcst:
$ wgrib2 png.grb -set_pdt +0
1:4:d=2009060500:RH:2 m above ground:330 hour fcst:


See also: -Sec4, -code_table_4.0, -pdt

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Page last modified: July 30, 2014
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