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Dear IDV users, I have a problematic observation file which I can't open with IDV. It is of the type "point" feature, and has a record axis with independent observations. Each record has separate longitude, latitude, time and data values. The original file which _does_ work is here: http://freja.argoss.nl/file-exchange/Surface_Synoptic_latest.nc I have tried to compress the file by doing the following: 1) remove large variables 2) change record axis to a fixed axis 3) scale floats and ints to short 4) add netcdf4 format and compression The resulting file is here: http://freja.argoss.nl/file-exchange/test_packed_surface.nc The result (< 1mb) is indeed much smaller than the original (23mb) and contains identical thata for those variables I have kept. However: Step 1 is fine, IDV reads the file. Step 2 makes the file unreadable for IDV, although I don't see why it should. Step 3 doesn't achieve compression without step 2 (netcdf pads variable records to 4 bytes) Step 4 doesn't achieve compression without step 2 (variable records to small for compression algorithm) Could anyone help me in making this file work in IDV? I've tried to track down the source code in the java-netcdf source code that reads point data files, but so far I didn't succeed. A pointer to the right source file would be great, so I can try to make it work. Kind regards, Hein Zelle -- Dr. Hein Zelle Senior consultant meteorology & oceanography BMT ARGOSS Tel: +31 (0)527-242299 Fax: +31 (0)527-242016 E-mail: hein.zelle@xxxxxxxxxxxxx Website: www.bmtargoss.com BMT ARGOSS b.v. Voorsterweg 28, 8316 PT Marknesse, the Netherlands Postal address: P.O. Box 61, 8325 ZH Vollenhove, the Netherlands Registered in The Netherlands, Registered no. 39060160. Unless otherwise agreed by BMT ARGOSS in writing, all work, services, goods or products supplied by BMT ARGOSS shall be subject to and governed by BMT ARGOSS' own terms and conditions which are available for inspection from BMT ARGOSS on request. E-mail confidentiality notice and disclaimer: The contents of this e-mail and any attachments are intended for the use of the mail addressee(s) shown. If you are not that person, you are not allowed to read it, to take any action based upon it or to copy it, forward, distribute or disclose the contents of it and you should please delete it from your system. BMT ARGOSS does not accept liability for any errors or omissions in the context of this e-mail or its attachments which arise as a result of internet transmission, nor accept liability for statements which are those of the author and clearly not made on behalf of BMT ARGOSS.
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