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I'm looking for some examples of extracting data from grib files using the
Java decoders. The Grib1Dump utility shows the output at the bottom of this
message. However, when I load the file using the code below, I get zero
records. I'm new to grib files, and my understanding is that there should be a
record for each parameter.
ucar.unidata.io.RandomAccessFile raf = new
ucar.unidata.io.RandomAccessFile("data/seaTemp1","r");
Grib1Input gribInput = new Grib1Input(raf);
System.out.println("GRIB version is " + gribInput.getEdition());
List records = gribInput.getRecords();
System.out.println("Number of records is " + records.size());
Dump of the GRIB file:
Header : GRIB1
Discipline : 0 Meteorological Products
GRIB Edition : 1
GRIB length : 390002
Originating Center : 58 U.S. Navy Fleet Numerical
Meteorology and Oceanography Center
Originating Sub-Center : 0 WMO Secretariat
Product Definition : 0 Forecast/Uninitialized Analysis/
Image Product
Parameter Category : -1 Meteorological Parameters
Parameter Name : 80 var80 temperature of sea water
Parameter Units : deg_K
Reference Time : 2008-07-30T12:00:00Z
Time Units : hour
Time Range Indicator : product valid at RT + P1
Time 1 (P1) : 0
Time 2 (P2) : 0
Generating Process Type : 78 126 wave triangular, 28 layer
Spectral model from Medium Range Forecast run
Level Type : 1 surface
Level Value 1 : 0.0
Level Value 2 : 0.0
GDS Exists : true
BMS Exists : false
Number of data points : 259920
Grid Name : Latitude/Longitude Grid
Grid Shape: 0 spherical
Spherical earth radius: 6367.47
Nx : 720
Ny : 361
La1 : -90.0
Lo1 : 0.0
Resolution & Component flags : 128
Winds : Relative
La2 : 90.0
Lo2 : -0.5
Dx : 0.5
Dy : 0.5
Scanning mode : 64
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