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

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
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:

Yet if I ask the WMS for a water_temp image over the same region for
the same time, it looks fine:

If I click right click on the black tile in Godiva2 and copy "image
location" I get
which indeed returns black.

If I copy the "image location" on a tile that works, I get
which works fine.

I really can't see any difference between these except for the bounds.

I'm mystified.



Dr. Richard P. Signell   (508) 457-2229
USGS, 384 Woods Hole Rd.
Woods Hole, MA 02543-1598

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