Re: [thredds] _FillValue ignored in WMS

• To: Pauline.Mak@xxxxxxxxxxx
• Subject: Re: [thredds] _FillValue ignored in WMS
• From: Roy Mendelssohn <Roy.Mendelssohn@xxxxxxxx>
• Date: Mon, 19 Jul 2010 07:19:35 -0700

This seems like the same problem that the WCS service had for awhile with 
making GeoTIFFS,

-Roy
On Jul 16, 2010, at 10:13 PM, Pauline Mak wrote:

> Hi all,
> 
> I've just downloaded the latest version of TDS and tried out WMS on some 
> datasets.  It looks like the TDS implementation of the WMS server is ignoring 
> the _FillValue attribute...?
> 
> I've tried this on ncWMS-1.0RC2 and it was able to generate a correct image.
> 
> I used the same KVP (except for LAYERS!) for both ncWMS and TDS:
> 
> http://localhost:8080/ncWMS-1.0RC2/wms?LAYERS=bomTest%2Ftemp&ELEVATION=-5&TIME=2010-07-07T12%3A00%3A00.000Z&TRANSPARENT=true&STYLES=boxfill%2Frainbow&CRS=EPSG%3A4326&NUMCOLORBANDS=254&LOGSCALE=false&SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&EXCEPTIONS=XML&FORMAT=image%2Fpng&BBOX=0,-90,180,90&WIDTH=256&HEIGHT=256
> 
> http://localhost:8080/thredds/wms/testAll/ocean_an_20100707_temp.nc?LAYERS=temp&ELEVATION=-5&TIME=2010-07-07T12%3A00%3A00.000Z&TRANSPARENT=true&STYLES=boxfill%2Frainbow&CRS=EPSG%3A4326&NUMCOLORBANDS=254&LOGSCALE=false&SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&EXCEPTIONS=XML&FORMAT=image%2Fpng&BBOX=0,-90,180,90&WIDTH=256&HEIGHT=256
> 
> And got the attached images (tds.png is generated from TDS, wms_ncwms.png is 
> generated by ncWMS).
> 
> I am currently using:
> 
> Version 4.2.20100607.1833 - 20100607.1833
> 
> With Java version:
> 
> java version "1.6.0_20"
> Java(TM) SE Runtime Environment (build 1.6.0_20-b02-279-10M3065)
> Java HotSpot(TM) 64-Bit Server VM (build 16.3-b01-279, mixed mode)
> 
> We had observe the same behaviour on another TDS server too, although, I'm 
> not sure what OS it's running on, or what the version of Java it's using.
> 
> I think at some point in time, I had a version of 4.2 that worked with 
> _FillValues correctly, but I no longer have access to that version anymore to 
> do a comparison...
> 
> Cheers,
> 
> -Pauline.
> 
> -- 
> Pauline Mak
> AODN-DO
> Ph: (03) 6226 8586
> Mob: 0411 638 196
> Email: pauline.mak@xxxxxxxxxxx
> <wms_ncwms.png><tds.png>_______________________________________________
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**********************
"The contents of this message do not reflect any position of the U.S. 
Government or NOAA."
**********************
Roy Mendelssohn
Supervisory Operations Research Analyst
NOAA/NMFS
Environmental Research Division
Southwest Fisheries Science Center
1352 Lighthouse Avenue
Pacific Grove, CA 93950-2097

e-mail: Roy.Mendelssohn@xxxxxxxx (Note new e-mail address)
voice: (831)-648-9029
fax: (831)-648-8440
www: http://www.pfeg.noaa.gov/

"Old age and treachery will overcome youth and skill."
"From those who have been given much, much will be expected" 

• References:
  • [thredds] _FillValue ignored in WMS
    • From: Pauline Mak