Re: [thredds] THREDDS 4.3 NetCDF Subsetter errors

• To: "Wright, Simon M." <smw@xxxxxxxxx>
• Subject: Re: [thredds] THREDDS 4.3 NetCDF Subsetter errors
• From: Ryan May <rmay@xxxxxxxx>
• Date: Mon, 17 Nov 2014 15:17:16 -0700

Simon,

Using the data you sent off-list I was able to reproduce the problems you
reported.

The one problem relates to spatial subsetting. I reproduced on both 4.3.20,
which is a little out of date, and 4.3.23, which is the latest on the 4.3.x
branch. It appears to work fine, however, on 4.5.x; I recommend updating to
4.5.3, which is our latest release to resolve this issue.

The other issue on coordinate subsetting is a bit more confusing, so I
still need to dig around here to see if those in the know can shed a bit
more light. This issue is still occurring with the latest 4.5.x code.

Ryan

On Thu, Nov 13, 2014 at 9:21 AM, Wright, Simon M. <smw@xxxxxxxxx> wrote:

>  Dear All
>
>
>
> I’m using the excellent THREDDS Data Server (version 4.3.20 – 20131125.1409) 
> and I’m trying to get to grips with the THREDDS NetCDF Subsetter (NCSS).  
> However, I’m having some problems and was wondering whether anyone can 
> provide some guidance.
>
>
>
> For some datasets that have a British National Grid (BNG) projection 
> (EPSG:27700) I can use the THREDDS NCSS interface to subset data as expected, 
> using both latitude/longitude and BNG coordinates.  However, for other 
> datasets, that also have a BNG projection, when I try to subset the data 
> using latitude and longitude I get an “Exception handled: null” error and 
> when I try to subset with BNG coordinates I get an “Invalid Range Exception 
> handled (Invalid Lat/Lon or Time Range): last (0) must be >= first (1299)” 
> error.
>
>
>
> I have examined the dataset description XML documents but can find any 
> obvious differences between the different BNG datasets.
>
>
>
> Does anyone have any idea why I’m getting the exceptions for some of my BNG 
> datasets?
>
>
>
>
>
>
>
> Many thanks in advance of any help anyone can provide.  Best wishes, Simon.
>
>
>
>
>
>
>
> Simon Wright
>
>
>
> GIS Application Developer
>
> Application Development Group
>
> Shore Section
>
> CEH Lancaster
>
> Lancaster Environment Centre
>
> Library Avenue
>
> Bailrigg
>
> Lancaster
>
> LA1 4AP
>
>
>
> Telephone: 01524 595857
>
>
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-- 
Ryan May
Software Engineer
UCAR/Unidata
Boulder, CO

• References:
  • [thredds] THREDDS 4.3 NetCDF Subsetter errors
    • From: Wright, Simon M.