Re: [thredds] Odd black tile in TDS/WMS/Godiva2

Hi Rich,

Oddly, if you zoom around or play with the BBOX, you can get the black
box to go away. Here are two BBOX:

BBOX=141.5,35.71111232908,145.11494567866,37.1
BBOX=142.0,35.71111232908,145.11494567866,37.1

The first produces an image without a black box. The second produces an
image that is partially black. The only difference is in the first value
(minx).

I just set my test server up to serve this dataset (using the remote
OPeNDAP access) and I'm seeing the same problem. No useful log messages
in threddsServlet.log, catalina.out, or localhost.*.log.

I'll look at this in the debugger later today or tomorrow to see if I
can figure out what is going on. Jon Blower might have some insight into
what is happening here. I'm also wondering if the current ncWMS code
(which will be part of TDS 4.3) has solved this problem.

Ethan

On 4/6/2011 9:35 AM, Rich Signell wrote:
> TDS WMS folks,
> [I asked this on the ncWMS list, but though it would be wise to ask
> here as well]
> 
> Have any of you seen this strange "black tile" behaviour in TDS/ncWMS/Godiva2?
> I'm using the WMS on TDS 4.2.5, and clicking the "Godiva2" link on the
> bottom of the page.
> 
> When I look at some Fukushima forecast sea-surface temperature fields
> from 
> <http://geoport.whoi.edu/thredds/godiva2/godiva2.html?server=http://geoport.whoi.edu/thredds/wms/ncom_relo/fukushima#>
> I see a black tile in the bottom right of my window for "water_temp"
> and other variables (except for sea_water_velocity, which is odd,
> since the eastward and northward velocity both have the black tile).
> 
> In case you don't want to fire up your browser, here's what it looks like:
> http://coast-enviro.er.usgs.gov/models/share/2011-04-06_0834.png
> 
> Yet if I ask the WMS for a water_temp image over the same region for
> the same time, it looks fine:
> http://coast-enviro.er.usgs.gov/models/share/2011-04-06_0849.png
> 
> If I click right click on the black tile in Godiva2 and copy "image
> location" I get
> <http://geoport.whoi.edu/thredds/wms/ncom_relo/fukushima?LAYERS=water_temp&ELEVATION=0&TIME=2011-04-06T00%3A00%3A00.000Z&TRANSPARENT=true&STYLES=boxfill%2Frainbow&CRS=EPSG%3A4326&COLORSCALERANGE=2%2C21&NUMCOLORBANDS=64&LOGSCALE=false&SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&EXCEPTIONS=XML&FORMAT=image%2Fpng&BBOX=142.23782226564,32.757265625006,146.07398681642,36.593430175788&WIDTH=256&HEIGHT=256>
> which indeed returns black.
> 
> If I copy the "image location" on a tile that works, I get
> <http://geoport.whoi.edu/thredds/wms/ncom_relo/fukushima?LAYERS=water_temp&ELEVATION=0&TIME=2011-04-06T00%3A00%3A00.000Z&TRANSPARENT=true&STYLES=boxfill%2Frainbow&CRS=EPSG%3A4326&COLORSCALERANGE=2%2C21&NUMCOLORBANDS=64&LOGSCALE=false&SERVICE=WMS&VERSION=1.3.0&REQUEST=GetMap&EXCEPTIONS=XML&FORMAT=image%2Fpng&BBOX=142.23782226564,36.593430175788,146.07398681642,40.429594726569&WIDTH=256&HEIGHT=256>
> which works fine.
> 
> I really can't see any difference between these except for the bounds.
> 
> I'm mystified.
> 
> Help?
> 
> Thanks
> -Rich
> 
> 
> 



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