Hey Cory- > Thanks Don....now I'm trying to place 10m HAGL wind barbs over topography. I > have to select a formula to calculate wind speed and direction and running to > trouble with surface winds. I can either plot 10m HAGL winds however, it is a > 2d plot where I can only raise and lower the image. The other is the True > wind vector formula, however, that only allows selection of constant pressure > surfaces (from the Gempak file)...not 10m HAGL. Is this feasible? It's a little complicated, but will be easier in the next release. For now: - select the Misc->Any Field formula and the 3D Surface->Wind Barbs Over Topography and hit the Create Display button. - when the topography dialog pops up, select geopotential height @ surface - When the dialog pops up for "field", select the Grids->Make flow vectors from grid relative u and v data formula. - Next, select the 2D grid->u-component of wind @ HAGL and 2D grid->v-component of wind @ HAGL for u and v. That will give you a plot. A couple of caveats: - it will not plot the vectors at 10 meters above the topography but right at the topography surface. The 10 meters gets lost in the combination. - The barbs are plotted horizontally at the location of the grid point. If you underlay a topography, the barbs will cut through the surface. They don't end up draped over it. Streamlines will end up on the surface. > Next you guys should try to develop an app with IDV that allows users to kill > mosquitoes....man they are ferocious up here Maybe we could put a 3D hand in the IDV. ;-) Don ________________________________________ > From: Unidata IDV Support address@hidden > Sent: Tuesday, June 23, 2009 1:24 PM > To: Joshua C Demko > Cc: address@hidden > Subject: [Support #LZX-581713]: color shaded image over topography > > Hi Cory- > > Best to send these to address@hidden in case I'm not around. > > > Real quick question? I am trying to remember the steps to drapping a color > > shaded image over topography. Here are my steps... > > > > Select temperature @ HAGL > > Then under display select Color-Shaded image over topography under the > > display window... > > Under the field selector I choose Formulas, then Miscellaneous, then Any > > Field hit OK > > Then select 2d field (WRF gridded data) such as temperature > > > > Error dialog box pops up at that junction with the following error... > > > > topography units K must convertible with m or gpm > > Now I am able to do this same procedure only for the model terrain but no > > other Met field. I believe I remember the steps correctly. I am using IDV > > 2.7 beta 3. > > You need to select a topography (vertical units of m or gpm) for the > topography field. You've already selected the temperature field in the first > step. When the dialog pops up, select the 2D grid->geopotential height @ > surface (HGHT_NONE) field. It should show up as a topography field now in > 2.7 b3 so you don't have to use the Any Field any more. > > Don Murray > > Ticket Details > =================== > Ticket ID: LZX-581713 > Department: Support IDV > Priority: Normal > Status: Open > Ticket Details =================== Ticket ID: LZX-581713 Department: Support IDV Priority: Normal Status: Open
NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.