[opendx-users] Importing NETCDF data

[Frederick R. Phelan Jr.]

Hi,

Does anyone have any experience importing NETCDF data to dx ? I am importing 2-D convective diffusion data with variables u,v,p and c from another program using NETCDF format.

The problem is that DX does seem to realize that the data is time-dependent, and it thinks it is 3-D instead of 2-D ... perhaps it has the time interpreted as a third dimension? When a run it through a SELECT->AUTOCOLOR->ISOSURFACE->IMAGE it shows up as a 3-D surface.

I also tried the data prompter, which does render a 2-D image, but what it renders bares no resemblance to the data. Even the dimensions of the rectangle are distorted.

How can I restructure things so that DX interprets things correctly. I need u,v to be a vector field, and P and C to be 2-D unsteady scalars.

I get the following information from a describe.

---
Memory cache will use 894 MB (54 for small items, 840 for large)
port = 1900
 0:  worker here [508]
Begin Execution
 0:  WARNING:  no 'field' attributes; importing all netCDF variables
Object Description:
Input object is a Group which contains 7 members.
 member 0 is named T
 member 1 is named X
 member 2 is named Y
 member 3 is named u
 member 4 is named v
 member 5 is named p
 member 6 is named c
Each group member is a Field, the basic data carrying structure in DX.
The positions are enclosed within the box defined by the corner points:
[ 0 0 0 ] and [ 50 50 50 ]
Data range is:
minimum = -1.00093, maximum = 9.45735e+008, average = 1.18109e+008
(These are the scalar statistics which will be used by modules
which need scalar values.  The length is computed for vectors and
the determinant for matricies.)
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Thanks!

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Frederick R. Phelan Jr., Ph.D.
Processing Characterization Group
Polymers Division
National Institute of Standards and Technology

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