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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
> Full Name: Dave Dempsey
> Email Address: address@hidden
> Organization: San Francisco State University
> Package Version: 2.9u4 build date:2011-03-02 08:14 UTC
> Operating System: Mac OS X
> Hardware: Java: home:
> /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home version:
> 1.6.0_24 j3d:1.5.2 fcs (build4)
> Description of problem: Creating display: Omni Control
> visad.SetException: visad.SetException: Gridded3DSet.valueToGrid:
> ManifoldDimension must be 3
> Gridded3DSet.valueToGrid: ManifoldDimension must be 3
>
> I'm trying to calculate surface temperature advection from the latest NAM 40
> km analysis, using the Horizontal Advection formula. I specify temperature @
> height above ground as my scalar field and u- and v-components of wind
> @height above ground as the wind components. (The temperature is probably at
> 2 meters above ground, while the wind components are 10 meters above ground,
> probably. I wonder if this poses a problem.)
>
Hi Dave,
The problem here is the difference in the height, the advection formula in
the derived does not work in this case.
You can add a local formula to do this:
def surfaceHorizontalAdvection(aFF, uFF, vFF):
udtdx=GridMath.multiply(GridMath.ddx(aFF),uFF);
vdtdy=GridMath.multiply(GridMath.ddy(aFF),vFF);
advgrid=GridMath.add(udtdx,vdtdy);
return advgrid.negate();
I tested this in my machine and worked. I will probably make some changes in
the source code, so you will not need to do this in the future.
Yuan
> When I click on the Create Display button, I get the error message above.
>
Ticket Details
===================
Ticket ID: RWC-894290
Department: Support IDV
Priority: Normal
Status: Open