[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[IDV #UQR-619669]: Gridded Fields on U,V or Speed,Dir of Points Obs Data

This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.

  • Subject: [IDV #UQR-619669]: Gridded Fields on U,V or Speed,Dir of Points Obs Data
  • Date: Fri, 09 Mar 2012 13:57:07 -0700
> Hi
> 
> I am trying to make a streamline view on wind speed and direction point data.
> 
> I have a csv that contains
> Latitude[unit="degree"],Longitude[unit="degree"],WINDSPEED[unit="m/sec"],WINDDIRECTION[unit="degree"]
> I converted them to U,V vectors.
> 
> Once I loaded the csv into IDV
> I have "Gridded Fields" U and V separately
> 
> And I use "Formulas">"Grids">"Make flow vectors from u and v data" to
> form a "Wind Barb Plan View"
> 
> It seems to me that the wind barb output from gridded UV is very
> different from the originaly csv WindSpeed and WindDirection
> (using station model)
> 
> I have tried to find the document for this but fail.
> WANT TO KNOW:
> Is this supported by IDV?
> Any tunning I need to do?

Eric,
    I think you are on the right track, not sure how much difference in your 
output. Can you send me some output image and maybe a small sample data?


Yuan
> 
> Thanks a lot!
> 
> --
> Best Regards,
> Eric Fong
> 
> 


Ticket Details
===================
Ticket ID: UQR-619669
Department: Support IDV
Priority: Normal
Status: Open