[thredds] Fwd: _FillValue ignored in WMS

(Forwarding, because I don't think the message made it to the mailing list since switching to this email address)

-------- Original Message --------
Subject: _FillValue ignored in WMS
Date: Sat, 17 Jul 2010 15:13:44 +1000
From: Pauline Mak <pauline.mak@xxxxxxxxxxx>
Reply-To: pauline.mak@xxxxxxxxxxx
To: THREDDS THREDDS <thredds@xxxxxxxxxxxxxxxx>
CC: Tim Pugh <T.Pugh@xxxxxxxxxx>

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

Attachment: wms_ncwms.png
Description: PNG image

Attachment: tds.png
Description: PNG image

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