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Hi John, Next week would be great! Also would we be able to add that getEarthRadius() method to LambertConformal? I can send you an updated file if that will be easier. The reason is that we need this value to help us properly rotate the wind vectors in our RUC files. As far as a data set goes ... I'm reading a GRIB1 file (so it assumes a radius of 6367.47km). We have some legacy code that uses JGrib with this radius. I've been writing a new version of our library using NetCDF and was comparing projections at various points to get a warm fuzzy that the new code is working. When NetCDF was incorrectly using a radius of 6371.229km, the projections differed in some cases by 3 km. After making my fixes, the projections were within 4-5 decimal places of our JGrib version. Does that answer your question? Thanks again, Nate From: John Caron [mailto:caron@xxxxxxxxxxxxxxxx] Sent: Friday, June 10, 2011 10:08 AM To: Mittler, Nathan Cc: netcdf-java@xxxxxxxxxxxxxxxx Subject: Re: [netcdf-java] Bug/fix for processing grib v1 with proper earth radius. Hi Nathan: Sorry, ive been hoping I could just tell you it was done, but we have a delay for another reason, so 4.2.28 will probably be out next week and will have your fixes in it. the question I have is whether you have a dataset where theres any noticeable difference between earth radius 6371.229km and 6367.47km ? thanks for contributing your fix. John On 6/10/2011 10:56 AM, Mittler, Nathan wrote: Hi John, It's been a couple of days, so I figured I should repost .... Any idea when the next release of netcdf-java will be? And whether or not my changes can make it in? Also, I was wondering if we could add a getEarthRadius() method to the LambertConformal projection? Thanks, Nate From: Mittler, Nathan Sent: Wednesday, June 08, 2011 8:06 AM To: 'John Caron'; netcdf-java@xxxxxxxxxxxxxxxx Subject: RE: [netcdf-java] Bug/fix for processing grib v1 with proper earth radius. Hi John, Glad I could help! I'm not quite sure I understand your question ... are you asking whether these changes would somehow affect projections that use the standard Earth radius? I don't have a test dataset that uses the standard radius at the moment, but I would assume there would be no issue. Also, do you have a feel for when the next release of netcdf-java will be? And whether or not these changes could make it in? Thanks, Nate From: netcdf-java-bounces@xxxxxxxxxxxxxxxx [mailto:netcdf-java-bounces@xxxxxxxxxxxxxxxx] On Behalf Of John Caron Sent: Wednesday, June 08, 2011 6:39 AM To: netcdf-java@xxxxxxxxxxxxxxxx Subject: Re: [netcdf-java] Bug/fix for processing grib v1 with proper earth radius. Hi Nathan: These changes look good, thanks very much. It looks like the two bugs cancelled each other out in use. BTW, are there any noticeable effects of the change of standard radius? John This message is intended only for the addressee and may contain information that is company confidential or privileged. Any technical data in this message may be exported only in accordance with the U.S. International Traffic in Arms Regulations (22 CFR Parts 120-130) or the Export Administration Regulations (15 CFR Parts 730-774). Unauthorized use is strictly prohibited and may be unlawful. If you are not the intended recipient, or the person responsible for delivering to the intended recipient, you should not read, copy, disclose or otherwise use this message. If you have received this email in error, please delete it, and advise the sender immediately. - This message is intended only for the addressee and may contain information that is company confidential or privileged. Any technical data in this message may be exported only in accordance with the U.S. International Traffic in Arms Regulations (22 CFR Parts 120-130) or the Export Administration Regulations (15 CFR Parts 730-774). Unauthorized use is strictly prohibited and may be unlawful. If you are not the intended recipient, or the person responsible for delivering to the intended recipient, you should not read, copy, disclose or otherwise use this message. If you have received this email in error, please delete it, and advise the sender immediately. -
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