> On Aug 20, 2014, at 8:33 PM, <Terry.Rankine@xxxxxxxx> wrote:
>
<snip>
> What do others do for this problem?
>
Set the min and max to the 2.5% and 97.5% percentiles of the data being
plotted. That usually gives pretty good results.
-Mike
> Regards
> Terry
>
>
>
> -----Original Message-----
> From: thredds-bounces@xxxxxxxxxxxxxxxx
> [mailto:thredds-bounces@xxxxxxxxxxxxxxxx] On Behalf Of
> Terry.Rankine@xxxxxxxx
> Sent: Thursday, 21 August 2014 10:45 AM
> To: j.d.blower@xxxxxxxxxxxxx; thredds@xxxxxxxxxxxxxxxx
> Subject: [ExternalEmail] Re: [thredds] NetCDF, WMS, and auto color scale
> (not set by admin)
>
> The two workflows we have are
> 1. Dump the data in "this" folder heriachy/structure - it will magically
> appear for you.
> 2. Email us and we will host it.
>
> I cant see any issue with scripting it, but I was under the impression that
> changes to the xml file would require TDS to be restarted, plus its just
> another bit of data to keep in 'sync' somehow.
>
> My desire here would be that, as an admin, I would tell the wmsConfig.xml
> <location /this/path/his-data-set-*.nc>
> <layer name=elevation>
> <default color range>
> <min>$delegate[elevation.vmin]</min>
> <max>$delegate[elevation.vmax]</max>
> </default color range>
> </layer>
> </location>
>
> As an admin I would deliberately hand over the 'setting the right view
> stuff' for those who could control the data production/attribution. Freeing
> me from that role.
>
> I completely understand where it is not appropriate - but I don't believe
> that makes it 'inappropriate' for the simple cases.
>
> Terry
>
> -----Original Message-----
> From: thredds-bounces@xxxxxxxxxxxxxxxx
> [mailto:thredds-bounces@xxxxxxxxxxxxxxxx] On Behalf Of Jon Blower
> Sent: Thursday, 21 August 2014 2:48 AM
> To: thredds@xxxxxxxxxxxxxxxx
> Subject: Re: [thredds] NetCDF, WMS, and auto color scale (not set by admin)
>
> Hi Terry,
>
> As far as I remember THREDDS has always required setting of the default
> colour scale range by the admin. (However the standalone ncWMS could do this
> automatically, because it scans datasets during an ingestion step, which
> THREDDS does not perform.)
>
> There is currently no way to read the default colour range from the NetCDF
> files, although a means could theoretically be invented, with "special"
> attributes. One problem is that, in a multidimensional variable, the most
> appropriate range for one z or t level may not be so appropriate for another
> value of z or t. There are other interesting issues with the behaviour of
> NetCDF attributes in aggregations (what happens if different files in the
> same aggregation have different attributes?)
>
> How do the data providers communicate their preferences to you at the
> moment? Could you, for example, craft a script that takes their values (from
> a simple text file maybe) and inserts it appropriately into the
> wmsConfig.xml automatically?
>
> Cheers,
> Jon
>
>
>>
>>
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Wed, 20 Aug 2014 01:19:29 +0000
>> From: <Terry.Rankine@xxxxxxxx>
>> To: <thredds@xxxxxxxxxxxxxxxx>
>> Subject: [thredds] NetCDF, WMS, and auto color scale (not set by
>> admin)
>> Message-ID:
> <918EBF4F0E40D340B213B473CCAB6B126000492D@xxxxxxxxxxxxxxxxxxxxxxxxxx>
>> Content-Type: text/plain; charset="us-ascii"
>>
>> Hi Guys
>>
>>
>>
>> In older versions of thredds I could leave the auto color scaling for
>> a WMS to thredds to take care of for me. Can I have it back - but a
>> bit
> different.
>>
>>
>>
>> As a system admin - I am just 'serving the data' not really
>> understanding what 'sensible viewing defaults' for
>> defaultColorScaleRange for any file in the directory should be.
>> However - the data owners I interact with all have a 'preference' on
>> how to color/scale their visualisations for their data files.
>>
>>
>>
>> Is there a way to make thredds read the netCDF file - load the
>> variable, and load the visualisation range FROM THE DATA FILE - not
>> the wmsConfig.xml - where I would need to explicitly set it?
>>
>>
>>
>> IE - if on the elevation layer for this service:
>>
>> http://vhirl-dev.csiro.au/thredds/dodsC/dem/testconvert/bathymetry_sur
>> veys_G
>> A-2476_100m_version1_WGS84UTM49S_esri_grid_grid100m_GA-2476_Exmouth_10
>> 0m_exm
>> outh100m.nc4.html
>>
>>
>>
>> I set a netcdf parameter like defaultColorScaleRange or something less
>> thredds specific, max/min or something which could guide the 'lazy'
>> configuration option for the data?
>>
>>
>>
>> Regards
>>
>> Terry
>
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