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Re: [thredds] _FillValue ignored in WMS

Hi Ethan,

I've just tried this, but didn't seem to have worked...

I am using TDS Version 4.2.20100707.0012, downloaded from:

ftp://ftp.unidata.ucar.edu/pub/thredds/4.2/snapshot/thredds.war
The standalone ncWMS is still displaying the image correctly, but using TDS (and the GoDiva2 link), I'm still getting a lot of black areas. I had to copy the wmsConfig.xml file across to $TOMCAT_HOME/content/thredds.
I've changed the config to use the same colour scale as what's shown in the standalone ncWMS: 

        <datasetPath pathSpec="testAll/20010101*.nc">
            <pathDefaults>
                <allowFeatureInfo>false</allowFeatureInfo>
                <defaultPaletteName>rainbow</defaultPaletteName>
            </pathDefaults>
            <variables>
                <variable id="sea_surface_temperature">
<defaultColorScaleRange>272 306.3</defaultColorScaleRange> 
                </variable>
            </variables>
        </datasetPath>
I think this setting should be OK - because when I clicked on the GoDiva link at the bottom, the colour scales (on the right hand side) was shown as 272 to 306.3. 

And now, for the comparison:

http://localhost:8080/ncWMS-1.0RC2/wms?LAYERS=AVHRR%2Fsea_surface_temperature&ELEVATION=0&TIME=2001-01-01T22%3A44%3A00.000Z&TRANSPARENT=true&STYLES=boxfill%2Frainbow&CRS=EPSG%3A4326&COLORSCALERANGE=271.99%2C306.31&NUMCOLORBANDS=254&LOGSCALE=false&SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&EXCEPTIONS=XML&FORMAT=image%2Fpng&BBOX=103.98999786377,-48.020000457764,165.02000427246,-7.9899997711182&WIDTH=256&HEIGHT=256

http://localhost:8080/thredds/wms/testAll/20010101-ABOM-L3P_GHRSST-SSTsubskin-AVHRR_MOSAIC_01km-AO_DAAC-v01-fv01_0.nc?service=WMS&version=1.3.0&request=GetMap&Layers=sea_surface_temperature&ELEVATION=0&TIME=2001-01-01T22%3A44%3A00.000Z&TRANSPARENT=true&STYLES=boxfill%2Frainbow&CRS=EPSG%3A4326&COLORSCALERANGE=271.99%2C306.31&NUMCOLORBANDS=254&LOGSCALE=false&SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&EXCEPTIONS=XML&FORMAT=image%2Fpng&BBOX=103.98999786377,-48.020000457764,165.02000427246,-7.9899997711182&WIDTH=256&HEIGHT=256
And have attached the resulting images. There were generated using the file located here: 

http://opendap-ivec.arcs.org.au/thredds/fileServer/IMOS/SRS/ABOM-L3P_GHRSST-SSTsubskin-AVHRR_MOSAIC_01km/2001/20010101-ABOM-L3P_GHRSST-SSTsubskin-AVHRR_MOSAIC_01km-AO_DAAC-v01-fv01_0.nc

Cheers,

-Pauline.

On 20/07/10 1:53 AM, Ethan Davis wrote:

Hi Pauline,

Could you try this in our latest TDS snapshot and/or send an example
dataset?

The latest TDS snapshot is 4.2.20100707.0012. It is available from our
FTP server at

ftp://ftp.unidata.ucar.edu/pub/thredds/4.2/snapshot/

Thanks,

Ethan

On 7/16/2010 11:13 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.


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--
Pauline Mak
AODN-DO
Ph: (03) 6226 8586
Mob: 0411 638 196
Email: pauline.mak@xxxxxxxxxxx

Attachment: TDS.png
Description: PNG image

Attachment: ncWMS.png
Description: PNG image

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