Hi Dan -- I assume from your description that you tried to do a "change range" on the theta-e plot. In my example, the original range was 250-420K.....so perhaps you just tried changing the range to something like 310-420K or something? The behaviour of this is that it then treats all values from 250-309 as if there were equal to 310, for the purpose of mapping from the data to the color table. The way I know of to accomplish this is to edit the color table, click on the "Transparency" radio button, set the transparency to 100%, and then grab the slider above the "250" and drag it to the right (you should see black/white checkboard pattern). You will then get something like the attached (I hope) image. Hope that helps... tom On Sun, Apr 20, 2008 at 12:42 PM, Dan Grey <dangrey@xxxxxxxxx> wrote: > I've got a sat pic (from a server under "Images") on the surface, and > a colour-shaded plot of theta-e at 850 hPa from the GFS above. I > restrict the visible range of the theta-e to a value so only areas > above a certain value are shown (to illustrate a plume event). However > areas with theta-e below my range appear black, rather than showing > through the sat pic below. > > Am I missing something simple, is this is intended behaviour, or is it a bug? > > > Dan > _______________________________________________ > idvusers mailing list > idvusers@xxxxxxxxxxxxxxxx > For list information, to unsubscribe, visit: > http://www.unidata.ucar.edu/mailing_lists/ > -- Tom Whittaker University of Wisconsin-Madison Space Science & Engineering Center (SSEC) Cooperative Institute for Meteorological Satellite Studies (CIMSS) 1225 W. Dayton Street Madison, WI 53706 USA ph: +1 608 262 2759
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