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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
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Hi Tom/Don, I had in mind to obtain the heights of the wet-bulb freezing level surface, which is why I was thinking it would be nice if there was an isosurface method that would return the heights of the surface. I think all one can do with folded areas is be content with a discontinuity in any 2d representation, though a discontinuity might not be the result of a fold. Paul On 11 December 2013 02:13, Don Murray (NOAA Affiliate) <don.murray@xxxxxxxx>wrote: > All- > > Gridded3DSet would return you a geometry in VisAD coordinates and you > could then convert those to lat/lon/alt by running them through the > MapProjectionDisplay's coordinate system (fromReference), I would presume. > But tom's point is valid in that you can't always map an isosurface to a > 2D surface. Even a "simple" field like temperature might have folds where > there are inversions. > > Don > > > On 12/10/13 8:08 AM, Tommy Jasmin wrote: > >> On 12/10/13 8:52 AM, Tom Whittaker wrote: >> >>> Paul -- I don't know of anything off-hand. One issue I see is if >>> there is a fold in the isosurface, a 2D representation is impossible. >>> For example, think of an isosurface of wind speed for, say, the 40kt >>> isosurface -- they would be "tubes" and "bubbles"... >>> >>> tom >>> >>> On Mon, Dec 9, 2013 at 11:47 PM, Paul Graham <meteorpaul@xxxxxxxxx> >>> wrote: >>> >>>> Hi IDV'ers, >>>> >>>> I'm interested to know if there is a way to extract an isosurface >>>> from a 3d >>>> gridded field and store it as a 2d grid of isosurface heights for >>>> display >>>> or other purposes, using an IDV Jython script? >>>> >>>> Any help is appreciated. >>>> >>>> Thanks, >>>> >>>> Paul >>>> _______________________________________________ >>>> >>>> >> Hi guys - you are probably both aware but just to be sure, the VisAD >> Gridded3DSet >> class does have methods to extract both isosurfaces and isolines : >> >> http://www.ssec.wisc.edu/visad-docs/javadoc/visad/Gridded3DSet.html >> >> > -- > Don Murray > NOAA/ESRL/PSD and CU-CIRES > 303-497-3596 > http://www.esrl.noaa.gov/psd/people/don.murray/ > > > _______________________________________________ > idvusers mailing list > idvusers@xxxxxxxxxxxxxxxx > For list information, to unsubscribe, visit: http://www.unidata.ucar.edu/ > mailing_lists/ > -- Paul Graham Email: meteorpaul@xxxxxxxxx Mobile: 0403003784
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