[Met_help] [rt.rap.ucar.edu #79924] History for NETCDF Error

[John Halley Gotway via RT]

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  Initial Request
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John, first a reminder - I have two other issues into you guys which I am awaiting a reply.  On this issue, I am verifying global ensemble wind speeds > 15kts.  So the forecast is the probability of wind speeds > 15kts.  I am using the model analysis for ground truth.  In this case I take the model U and V components, calculate the wind speed, threshold it to > 15kts and then write it out to a NETcdf file.  When MET tries to read this file is spits the following error:

DEBUG 1: Default Config File: /h/WXQC/met-5.2/share/met/config/GridStatConfig_default
DEBUG 1: User Config File: /h/WXQC/met-5.2/data/config/GridStatConfig_geps_updated
DEBUG 4: Met2dDataFileFactory::new_met_2d_data_file() -> created new Met2dDataFile object of type "FileType_Gb1".
DEBUG 4: Met2dDataFileFactory::new_met_2d_data_file() -> created new Met2dDataFile object of type "FileType_NcMet".
ERROR  : 
ERROR  : read_netcdf_grid_v3() -> Projection type latlon not currently supported.
ERROR  :

The MET documentation says MET supports latlon grids so not sure why the error.  I placed the NETcdf file in question on your server.


Thanks
Bob Craig



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  Complete Ticket History
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Subject: NETCDF Error
From: John Halley Gotway
Time: Wed Mar 22 09:58:36 2017

Bob,

I was able to replicate the error you're seeing by calling
plot_data_plane
on obdata.nc:

met-5.2/bin/plot_data_plane obdata.nc obdata.ps 'name="PWS15";
level="(*,*)";'
ERROR  :
ERROR  : read_netcdf_grid_v3() -> Projection type latlon not currently
supported.
ERROR  :

I get the same error from the development version of MET.  Running it
through the debugger, the problem is obvious... where you have
*Projection
= "latlon"* you need to change it to *"LatLon"*.

But I'll make the following two changes to the development version (to
be
included in version 6.0):

(1) Enhance the error message to actually list the names of the
supported
types:

ERROR  :
ERROR  : read_netcdf_grid_v3() -> Projection "latlon" not a currently
supported type ("LatLon", "Mercator", "Lambert Conformal", "Polar
Stereographic").
ERROR  :

(2) Make the checking of projection names case-insensitive... so
"latlon"
works just as well as "LatLon".


I ran the following ncatted command to change that global attribute
from
"latlon" to "LatLon":
   ncatted -a Projection,global,o,c,LatLon obdata.nc -o
obdata_patch.nc

Then plotted it using met-5.2:
   met-5.2/bin/plot_data_plane obdata_patch.nc obdata.ps
'name="PWS15";
level="(*,*)";'

The resulting image is attached.  Looks like you may still have some
work
to do on that grid definition.

Sorry about the delay on those other tickets.  I'll take a look at
them now.

Thanks,
John

On Wed, Mar 22, 2017 at 8:18 AM, robert.craig.2 at us.af.mil via RT <
met_help at ucar.edu> wrote:

>
> Wed Mar 22 08:18:44 2017: Request 79924 was acted upon.
> Transaction: Ticket created by robert.craig.2 at us.af.mil
>        Queue: met_help
>      Subject: NETCDF Error
>        Owner: Nobody
>   Requestors: robert.craig.2 at us.af.mil
>       Status: new
>  Ticket <URL:
https://rt.rap.ucar.edu/rt/Ticket/Display.html?id=79924 >
>
>
> John, first a reminder - I have two other issues into you guys which
I am
> awaiting a reply.  On this issue, I am verifying global ensemble
wind
> speeds > 15kts.  So the forecast is the probability of wind speeds >
> 15kts.  I am using the model analysis for ground truth.  In this
case I
> take the model U and V components, calculate the wind speed,
threshold it
> to > 15kts and then write it out to a NETcdf file.  When MET tries
to read
> this file is spits the following error:
>
> DEBUG 1: Default Config File: /h/WXQC/met-5.2/share/met/conf
> ig/GridStatConfig_default
> DEBUG 1: User Config File: /h/WXQC/met-5.2/data/config/Gr
> idStatConfig_geps_updated
> DEBUG 4: Met2dDataFileFactory::new_met_2d_data_file() -> created new
> Met2dDataFile object of type "FileType_Gb1".
> DEBUG 4: Met2dDataFileFactory::new_met_2d_data_file() -> created new
> Met2dDataFile object of type "FileType_NcMet".
> ERROR  :
> ERROR  : read_netcdf_grid_v3() -> Projection type latlon not
currently
> supported.
> ERROR  :
>
> The MET documentation says MET supports latlon grids so not sure why
the
> error.  I placed the NETcdf file in question on your server.
>
>
> Thanks
> Bob Craig
>
>
>

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