Hi Viv,
adding some feedbacks to Ben's ones.
I have a sample NetCDF with a temperature variable containing scale_factor
and add_offset attributes.
I have a colormap for celsius degrees temperature.
When the system property is properly set, I can see proper colors and
proper values in a getFeatureInfo:
Note the value is a floating point number, coming from the "scale_factor"
and "add_offset" properties being applied.
When disabling that property and rendering again the layer, I have to
switch off the colormap style (since the quantities are different) and need
to use the default raster style.
Note the value now is -6109 since the scale_factor and add_offset hasn't
being applied.
So, as suggested by Ben, what is not working on your case?
Please, let us know.
Cheers,
Daniele
On Tue, Oct 25, 2016 at 2:50 AM, Ben Caradoc-Davies <b...@transient.nz>
wrote:
> Viv,
>
> Devon confirms that you are using the correct JVM system property.
>
> (1) What is the symptom that that you see? Map output unscaled? WMS
> GetFeatureInfo unscaled (clicking on OpenLayers map to get values)? WCS
> response incorrect?
>
> (2) What Conventions global attribute is set in the NetCDF file? The
> behaviour of the library depends on this attribute. If set to "CF-1.6"
> then scale_factor and add_offset should be supported.
>
> (3) "int" is an unusual type for "time"; "int" types are sometimes
> interpreted as categorical data. I do not know if the GeoServer NetCDF
> plugin has been tested with "int" time. The symptom of this being a
> problem would be time not being recognised as a dimension or the entire
> file being rejected. If it works (other than scale/offset not being
> applied), then time is likely OK.
>
> Kind regards,
> Ben.
>
>
> On 24/10/16 22:19, Ben Caradoc-Davies wrote:
> > Viv,
> >
> > that should be everything that is required. I have asked Devon (the
> > implementer of the new functionality) to check that my advice is
> > correct. Thank you for testing it!
> >
> > Kind regards,
> > Ben.
> >
> > On 24/10/16 21:45, viv...@gfz-potsdam.de wrote:
> >> Hi Ben,
> >>
> >> I installed last GeoServer master war archive from 2016-10-23
> >> (http://ares.boundlessgeo.com/geoserver/master/) and netcdf plugin.
> >> Additionally I enabled the JVM system property option:
> >> -Dorg.geotools.coverage.io.netcdf.enhance.ScaleMissing=true
> >>
> >> GeoServer is still not able to deal with scale_factor and add_offset. Is
> >> there something more to do or to install?
> >>
> >> Kind regards,
> >> Viv
> >>
> >>
> >>
> >> Am 2016/10/15 um 05:28 schrieb Ben Caradoc-Davies:
> >>> Viv,
> >>>
> >>> I merged this fix today. It should appear in the next nightly build
> >>> for GeoServer master.
> >>>
> >>> Note that, for reasons of backwards compatibility, this functionality
> >>> is disabled by default. To enable this option, set the JVM system
> >>> property:
> >>>
> >>> -Dorg.geotools.coverage.io.netcdf.enhance.ScaleMissing=true
> >>>
> >>> Kind regards,
> >>> Ben.
> >>>
> >>> On 15/10/16 01:37, Daniele Romagnoli wrote:
> >>>> Hi Viv,
> >>>> a JIRA has been created in the past weeks to deal with that:
> >>>> https://osgeo-org.atlassian.net/browse/GEOT-5516
> >>>>
> >>>> A PR has already been made to handle it (thanks Devon):
> >>>> https://github.com/geotools/geotools/pull/1301
> >>>>
> >>>> I think that it will be merged early next week (these days there is a
> >>>> Freeze due to releases in progress).
> >>>> So it should be available as part of the GeoServer nightly build in a
> >>>> couple of days.
> >>>>
> >>>> Hope this helps.
> >>>> Cheers,
> >>>> Daniele
> >>>>
> >>>> On Fri, Oct 14, 2016 at 2:17 PM, <viv...@gfz-potsdam.de> wrote:
> >>>>
> >>>>> Hello Everyone,
> >>>>>
> >>>>> I have downloaded a NetCDf file that contains packed short integer
> >>>>> values.
> >>>>>
> >>>>> The NetCDF Variables section looks like this:
> >>>>> variables:
> >>>>> float longitude(longitude) ;
> >>>>> longitude:units = "degrees_east" ;
> >>>>> longitude:long_name = "longitude" ;
> >>>>> float latitude(latitude) ;
> >>>>> latitude:units = "degrees_north" ;
> >>>>> latitude:long_name = "latitude" ;
> >>>>> int time(time) ;
> >>>>> time:units = "hours since 1900-01-01 00:00:0.0" ;
> >>>>> time:long_name = "time" ;
> >>>>> time:calendar = "gregorian" ;
> >>>>> short sst(time, latitude, longitude) ;
> >>>>> sst:scale_factor = 0.00053530401667862 ;
> >>>>> sst:add_offset = 286.836646410492 ;
> >>>>> sst:_FillValue = -32767s ;
> >>>>> sst:missing_value = -32767s ;
> >>>>> sst:units = "K" ;
> >>>>> sst:long_name = "Sea surface temperature" ;
> >>>>>
> >>>>>
> >>>>> Can GeoServer handle with scale_factor and add_offset attribute to
> >>>>> unpack
> >>>>> the values?
> >>>>>
> >>>>> Best regards,
> >>>>> viv
> >>>>>
> >>>>> ------------------------------------------------------------
> >>>>> ------------------
> >>>>> Check out the vibrant tech community on one of the world's most
> >>>>> engaging tech sites, SlashDot.org! http://sdm.link/slashdot
> >>>>> _______________________________________________
> >>>>> Geoserver-users mailing list
> >>>>> Geoserver-users@lists.sourceforge.net
> >>>>> https://lists.sourceforge.net/lists/listinfo/geoserver-users
> >>>>>
> >>>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>> ------------------------------------------------------------
> ------------------
> >>>>
> >>>>
> >>>> Check out the vibrant tech community on one of the world's most
> >>>> engaging tech sites, SlashDot.org! http://sdm.link/slashdot
> >>>>
> >>>>
> >>>>
> >>>> _______________________________________________
> >>>> Geoserver-users mailing list
> >>>> Geoserver-users@lists.sourceforge.net
> >>>> https://lists.sourceforge.net/lists/listinfo/geoserver-users
> >>>>
> >>>
> >>
> >>
> >>
> >>
> >
>
> --
> Ben Caradoc-Davies <b...@transient.nz>
> Director
> Transient Software Limited <http://transient.nz/>
> New Zealand
>
> ------------------------------------------------------------
> ------------------
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