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

[IDV #KKS-476124]: Aggregate grids by time

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 Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated.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 #KKS-476124]: Aggregate grids by time
  • Date: Thu, 16 Apr 2015 09:46:43 -0600
> Yuan et al:
> 
> I've recently been making extensive use of the Aggregate grids by
> time Data Source Type in IDV.  I am running IDV 5.0u3 and accessing Grib
> files locally stored on my iMac running MacOS 10.10.2.
> 
> What I've noticed is that this Data Source Type works only
> intermittently.  Sometimes I will load in 24 files in this manner and it
> correctly identifies and sequences all the available times. This leads
> to loops that include plots at all the available time. Other times, it
> only identifies one time and it will only plot one time.
> 
> I often save bundles when the files load in correctly.  If I close
> IDV and reload them, sometimes it will only identify and plot one time
> rather than all 24.  Further, when I reload the bundle, it will
> sometimes have the same problem, but plot a different time.  If I try a
> few times, eventually the bundle will finally load correctly.
> 
> Let me know if you have any ideas what might be going on.
> 
> Jim
> 
> 
Jim,
        I had a brief chat with Sean this morning about the issue you were 
experiencing. It is likely
the grib files you were trying to aggregate have multiple time dimensions and 
the ncml time aggregation is
not a good approach, in fact, the ncml time aggregation is going to be 
deprecated in the future. The
better solution will be something like grid collection type, which can take 
care multiple time dimensions
and other complicated structure when doing the aggregation. However, I don't 
have the time line when
this feature will be available.

Yuan


Ticket Details
===================
Ticket ID: KKS-476124
Department: Support IDV
Priority: Normal
Status: Open