JMA GRIB

From: ENOMOTO Takeshi (enomoto.takeshi AT XXXXXX)
Date: Sun Jan 26 2003 - 20:41:20 MST

  • Next message: Dave Brown: "Re: JMA GRIB"

    Hello,

    I am trying to read JMA forecast files in GRIB format with NCL.
    The number of longitudinal grids reduced toward the poles
    thus grids are not rectilinear.
    These files do not follow NCL's convection and
    does not provide gridx and gridy.

    Longitude grid arrays are problematic as below.
    Is there anything I can do in the script?
    Otherwise I will preprocess the files with other tools.

    Takeshi
    -------
    ncl 5> printVarSummary(gribfile->lat_37)

    Variable: lat_37 (file variable)
    Type: float
    Total Size: 292 bytes
                 73 values
    Number of Dimensions: 1
    Dimensions and sizes: [lat_37 | 73]
    Coordinates:
                 lat_37: [ 0..90]
    Number Of Attributes: 8
       GridType : Cylindrical Equidistant Projection Grid
       units : degrees_north
       Dj : 1.25
       Di : 65.535
       Lo2 : 60
       La2 : 90
       Lo1 : 330
       La1 : 0
    ncl 6> printVarSummary(gribfile->lon_37)

    Variable: lon_37 (file variable)
    Type: float
    Total Size: 262140 bytes
                 65535 values
    Number of Dimensions: 1
    Dimensions and sizes: [lon_37 | 65535]
    Coordinates:
                 lon_37: [330..133.394]
    Number Of Attributes: 8
       GridType : Cylindrical Equidistant Projection Grid
       units : degrees_east
       Dj : 1.25
       Di : 65.535
       Lo2 : 60
       La2 : 90
       Lo1 : 330
       La1 : 0

    -----
    ENOMOTO, Takeshi, Dr
    enomoto.takeshi AT nasda.go.jp
    Frontier Research System for Global Change

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