Hi Matt,
I was able to check your sample.
It seems like a problem on your dataset OR on the underlying UCAR NetCDF
java lib.
Let me try to explain that in order to figure out the real issue.
When GeoTools/GeoServer accesses a NetCDF file, it delegates the UCAR
NetCDF lib (currently, 4.6.0 version) to open a NetCDF dataset. Due to the
wide amount of conventions, types, structures existing in the NetCDF world,
the UCAR lib tries to individuate the convention used by the specific
sample, by parsing some attributes, datatypes or elements.
For your case, the lib thinks that your data is part of the M3IOConvention.
https://github.com/Unidata/thredds/blob/master/cdm/src/main/java/ucar/nc2/dataset/conv/M3IOConvention.java#L72
since during the preliminar scan it finds the set of attributes required by
that convention.
// global attributes:
:NCOLS = 921; // int
:NROWS = 301; // int
:XORIG = -144.5; // double
:YORIG = 40.0; // double
:XCELL = 0.10000000149011612; // double
:YCELL = 0.10000000149011612; // double
Afterwards, it tries to setup the coordinates based on that convention:
https://github.com/Unidata/thredds/blob/master/cdm/src/main/java/ucar/nc2/dataset/conv/M3IOConvention.java#L98
And here is where it throws a NPE exception since the expected field
doesn't actually exists.
At this point, I have a set of questions for you.
How did you create this file? Can you share some more information about
that? Is it somehow related with the M3IOConvention?
I'm asking this so you can fix your sample data in case it isn't well
formed OR we can keep in touch with the UCAR team to improve their library
to support this sample in case it is a properly formed dataset.
Please, let me know.
Best Regards,
Daniele
On Fri, Jan 8, 2016 at 5:40 PM, brownbagel <fungyuensang...@hotmail.com>
wrote:
> Hello,
>
> After browsing around this forum, seems like this is a common issue, but I
> still do not seem to find a solution.
>
> I am attempting to upload NetCDF files onto geoserver via netCDF extension.
> Using sample .nc from the web, this extension works.
> However, when I attempt to upload my own files, I encounter the error
> "Could
> not find layer".
>
> I understand that geoserver requires CF/COARDS convention, I have attempted
> to rename my dimensions to be in accordance to this. Are there still other
> aspects of the .nc that I have to alter? Are there alternative methods (ie,
> converting to other file formats?) I've tried converting to geoTiff and
> .shp
> via GDAL but have no success in that.
>
> Attached: my .nc file (dispersion2.nc), geoserver log
> https://www.dropbox.com/sh/m5gebm21z73ng1y/AADky3C3q2mga0WqsyJ57Pbka?dl=0
>
> Thanks & Bless,
> Matt
>
>
>
>
> --
> View this message in context:
> http://osgeo-org.1560.x6.nabble.com/Geoserver-Store-NetCDF-issue-Could-not-find-layers-tp5244318.html
> Sent from the GeoServer - User mailing list archive at Nabble.com.
>
>
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