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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
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On Wed, 20 Feb 2008, Jelle Ferwerda wrote:
Hi all, A few moments I subscribed to the decoders mailing list. Great facility. I am looking for some assistence.. Let me start off by explaining I am a fair newby when it comes to programming java, although I do have experience in IDL, PHP programming. I am trying to implement a decoder to decode EUMETSET multi sensor precipitation estimate data (http://www.eumetsat.int/home/Main/Access_to_Data/Meteosat_Meteorological_Products/Product_List/SP_1119538666663?l=en on this page also a link to datafile downloads) I have downloaded the GRIBjava decoder. I am now trying to build a decoder so that I can retrieve the MPE data. Unfortunately when I get to the point of accessing the file and trying to get the individual grid definitions I get an error. The error:
Jelle,The Grib2 decoder isn't a batch file decoder for getting data. The idea is to make an index for the file using Grib2Indexer <fileName> and to use the Index to find what parameter to actually decode the requested parameter
data. The design was the result of very large Grib files. % Grib2Dump <fileName> shows the metadata of each record. % Grib2Indexer <fileName> gives the index of the fileThe file IndexFormat.txt in the root of the distribution explains the details of a Grib index. sample line:
0 0 0 6 2 103 2.0 255 0.0 2008-02-11T14:00:00Z 0 -418705429 121261 121342% Grib2GetData <fileName> <GDS offset> <PDS offset> gets the data for record
from above sample index line: % Grib2GetData <fileName> 121261 121342 Don't forget to set the CLASSPATH variable to the jar file.I'll download a test file to see if there are any problems decoding this type of data.
Robb... =============================================================================== Robb Kambic Unidata Program Center Software Engineer III Univ. Corp for Atmospheric Research rkambic@xxxxxxxxxxxxxxxx WWW: http://www.unidata.ucar.edu/ ===============================================================================
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