[ncl-talk] Problem with lat/lon units

[Dennis Shea]

The grids are curvilinear ... not rectilinear. This necessitates using the
reserved 'lat2d/lon2d' attributes

     qv = a->DPT_P0_L103_GLC0     ; (:,:)

   tk = a->TMP_P0_L103_GLC0     ;(:,:)


   lat = a->gridlat_0         ; (:,:)

   lon = a->gridlon_0         ; (:,:)


   tk at lat2d = lat

   tk at lon2d = lon


same for 'qv'


Good luck





On Fri, Dec 16, 2016 at 11:55 AM, Michael Buban - NOAA Affiliate <
michael.buban at noaa.gov> wrote:

> Hello,
>
> I'm trying to plot up HRRR data and am getting the following error about
> the lat/lon units.  Here is the code I'm trying to execute and the
> following output.
>
> ___________________________________
>
> SCRIPT:
>
>
> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
>
> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
>
> begin
>
>
>   a = addfile("hrrr.t12z.wrfsfcf01.grib2","r")
>
>
>   qv = a->DPT_P0_L103_GLC0(:,:) ;
>
>   tk = a->TMP_P0_L103_GLC0(:,:) ;
>
>
>    lat = a->gridlat_0(:,:)
>
>    lon = a->gridlon_0(:,:)
>
>
>     printVarSummary(lat)
>
>     printVarSummary(lon)
>
>
>    nx = 71
>
>    ny = 82
>
>
> ;   print(tk)
>
>
>   wks  = gsn_open_wks("X11","gsn_contour")    ; open a ps file
>
>
>
> ;*****************************
>
> ; create first plot
>
> ;*****************************
>
>   resn            = True        ; create vector resource array
>
>   resn at cnFillOn   = True        ; color fill
>
>   resn at cnLinesOn  = False       ; no contour lines
>
>
>   resn at gsnLeftString    = ""     ; no titles
>
>   resn at gsnRightString   = ""
>
>   resn at tiXAxisString    = ""
>
>   resn at tiYAxisString    = ""
>
>
>   resn at gsnDraw    = False       ; don't draw
>
>   resn at gsnFrame   = False       ; don't advance frame
>
>
>   resn at vpWidthF  = 0.8                    ; change the aspect ratio
>
>   resn at vpHeightF = 0.6
>
>
>
>   resn at gsnAddCyclic = False    ; regional data
>
>
>   resn at mpProjection = "LambertConformal"
>
>
>   resn at mpLimitMode            = "Corners"          ; choose region of map
>
>   resn at mpLeftCornerLatF       = lat(0,0)
>
>   resn at mpLeftCornerLonF       = lon(0,0)
>
>   resn at mpRightCornerLatF      = lat(ny-1,nx-1)
>
>   resn at mpRightCornerLonF      = lon(ny-1,nx-1)
>
>
>
>
>   resn at cnLevelSelectionMode = "ManualLevels"    ; manually set the
> contour levels
>
>   resn at cnMinLevelValF = 260.0
>
>   resn at cnMaxLevelValF = 288.0
>
>   resn at cnLevelSpacingF = 1.0
>
>
>
>   resn at pmLegendDisplayMode = "Never"
>
>   resn at tiMainOn = False
>
>
>   plot1 = gsn_csm_contour_map(wks,tk,resn)
>
>
>   draw(plot1)
>
>   frame(wks)
>
>
> end
>
> ------------------------------------------------------------
> OUTPUT:
>
>  Copyright (C) 1995-2015 - All Rights Reserved
>
>  University Corporation for Atmospheric Research
>
>  NCAR Command Language Version 6.3.0
>
>  The use of this software is governed by a License Agreement.
>
>  See http://www.ncl.ucar.edu/ for more details.
>
>
> Variable: lat
>
> Type: float
>
> Total Size: 23288 bytes
>
>             5822 values
>
> Number of Dimensions: 2
>
> Dimensions and sizes: [ygrid_0 | 82] x [xgrid_0 | 71]
>
> Coordinates:
>
> Number Of Attributes: 11
>
>   corners : ( 34.05317, 33.7815, 35.9347, 36.21489 )
>
>   long_name : latitude
>
>   grid_type : Lambert Conformal (secant, tangent, conical or bipolar)
>
>   units : degrees_north
>
>   Latin2 : 38.5
>
>   Latin1 : 38.5
>
>   Dy : 3
>
>   Dx : 3
>
>   Lov : 262.5
>
>   Lo1 : 274.705
>
>   La1 : 34.05317
>
>
> Variable: lon
>
> Type: float
>
> Total Size: 23288 bytes
>
>             5822 values
>
> Number of Dimensions: 2
>
> Dimensions and sizes: [ygrid_0 | 82] x [xgrid_0 | 71]
>
> Coordinates:
>
> Number Of Attributes: 11
>
>   corners : ( -85.29497, -83.05004, -82.62847, -84.93713 )
>
>   long_name : longitude
>
>   grid_type : Lambert Conformal (secant, tangent, conical or bipolar)
>
>   units : degrees_east
>
>   Latin2 : 38.5
>
>   Latin1 : 38.5
>
>   Dy : 3
>
>   Dx : 3
>
>   Lov : 262.5
>
>   Lo1 : 274.705
>
>   La1 : 34.05317
>
> (0) check_for_y_lat_coord: Warning: Data either does not contain a valid
> latitude coordinate array or doesn't contain one at all.
>
> (0) A valid latitude coordinate array should have a 'units' attribute
> equal to one of the following values:
>
> (0)     'degrees_north' 'degrees-north' 'degree_north' 'degrees north'
> 'degrees_N' 'Degrees_north' 'degree_N' 'degreeN' 'degreesN' 'deg north'
>
> (0) check_for_lon_coord: Warning: Data either does not contain a valid
> longitude coordinate array or doesn't contain one at all.
>
> (0) A valid longitude coordinate array should have a 'units' attribute
> equal to one of the following values:
>
> (0)     'degrees_east' 'degrees-east' 'degree_east' 'degrees east'
> 'degrees_E' 'Degrees_east' 'degree_E' 'degreeE' 'degreesE' 'deg east'
>
> warning:MapSetTrans: map limits invalid - using maximal area
>
> XIO:  fatal IO error 35 (Resource temporarily unavailable) on X server
> "/private/tmp/com.apple.launchd.3vDJHBflwq/org.macosforge.xquartz:0"
>
>       after 1087 requests (1084 known processed) with 0 events remaining.
> ____________________________________
>
> It seems like the units have valid arrays.  Any help would be appreciated!
>
> Thanks,
>
> Mike
>
>
> --
> Michael S. Buban, Ph.D.
> Research Associate
> NOAA/ARL Atmospheric Turbulence and Diffusion Division
> and Oak Ridge Associated Universities
> 456 South Illinois Avenue
> Oak Ridge, TN 37830
>
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