[ncl-talk] NCL Errors with Plotting IMS Snow Example

[Rick Brownrigg]

Hi,

At around line 170 of the script we see these two lines:

  res at tfDoNDCOverlay        = "NDCViewport"
; res at tfDoNDCOverlay        = True      ; old method
The docs for this resource indicate that it used to be of type bool, but
changed to an enumeration. However, the given default value for this
resource is shown as False, and the error in the script comes about because
a utility function called by the plotting code expects a logical value as
well, not an enumeration.  So this sounds like both a code bug and a
documentation bug.

You might try uncommenting the line setting the resource to True.

Let me know -- you may get a different error related the resource expecting
an enumerated value.  I'll file a bug report.

Rick

On Tue, Sep 25, 2018 at 3:52 PM Stuart D Smith <smit1770 at purdue.edu> wrote:

> Hello,
>
>
>
> I am working through the plotting example,  “NIC IMS Snow and Ice
> Products” from the NCL site (
> https://www.ncl.ucar.edu/Applications/nic_ims.shtml ). I did have to make
> adjustments to the script (attachment for reference), since the file
> extensions to the ftp site have changed. When plotting the example with the
> 24 km data, I receive unusual errors when trying to plot the last two
> figures. The error I receive is the following:
>
>
>
> “fatal:Conditional statements (if and do while) require SCALAR logical
> values, see all and any functions
>
> fatal:["Execute.c":8640]:Execute: Error occurred at or near line 1809 in
> file /apps/cent7/ncl/6.4.0/lib/ncarg/nclscripts/csm/gsn_csm.ncl
>
> fatal:["Execute.c":8640]:Execute: Error occurred at or near line 7482 in
> file /apps/cent7/ncl/6.4.0/lib/ncarg/nclscripts/csm/gsn_csm.ncl
>
> fatal:["Execute.c":8640]:Execute: Error occurred at or near line 181 in
> file Plot_IMS_4k.ncl”
>
>
>
> I have also tried to adjust the plotting script to work for 4km data.
> However, when plotting the first figure it fails to draw the figure and
> provides the following error message:
>
>
>
> fatal:ContourPlotDraw: Workspace reallocation would exceed maximum size
> 100000000
>
> fatal:ContourPlotDraw: draw error
>
> fatal:ContourPlotDraw: draw error
>
> fatal:PlotManagerDraw: error in plot draw
>
> fatal:_NhlPlotManagerDraw: Draw error
>
> fatal:Conditional statements (if and do while) require SCALAR logical
> values, see all and any functions
>
> fatal:["Execute.c":8640]:Execute: Error occurred at or near line 1809 in
> file /apps/cent7/ncl/6.4.0/lib/ncarg/nclscripts/csm/gsn_csm.ncl
>
> fatal:["Execute.c":8640]:Execute: Error occurred at or near line 7482 in
> file /apps/cent7/ncl/6.4.0/lib/ncarg/nclscripts/csm/gsn_csm.ncl
>
> fatal:["Execute.c":8640]:Execute: Error occurred at or near line 181 in
> file Plot_IMS_4k.ncl
>
>
>
> Could I please have guidance to correct the errors in order to plot both
> spatial resolutions correctly? I also wanted guidance on adjusting the
> script to plot a specific area rather than plotting the full extent. The
> data I have been using is listed in the example on the site, but I have
> also provided links to the ftp sites as well, which are listed below. Thank
> you for your time.
>
>
>
> Regards,
>
>
>
> -Stuart
>
>
>
> 4km IMS data
>
> ftp://sidads.colorado.edu/pub/DATASETS/NOAA/G02156/4km/2006/
>
> IMS metadata
>
> ftp://sidads.colorado.edu/pub/DATASETS/NOAA/G02156/metadata/
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