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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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