[ncl-talk] Missing grid lines about zero degree

[Kyle Griffin]

Hi Arnold,

Have you tried also setting

pres at gsnAddCyclic = True

This resource defaults to true in some of the newest versions of NCL, but
defaulted to False for a long time and produces issues like this.
gsnAddCyclic basically tells NCL to contour between the first (longitude=0)
and last (longitude=191 in your case) the same as it does other adjacent
points, despite these points not technically being adjacent in the dataset.

If there is still an issues after trying that, let us know and be sure to
include the list.


Kyle

----------------------------------------
Kyle S. Griffin
Department of Atmospheric and Oceanic Sciences
University of Wisconsin - Madison
Room 1421
1225 W Dayton St, Madison, WI 53706
Email: ksgriffin2 at wisc.edu

On Mon, May 25, 2015 at 12:49 AM, <Arnold.Sullivan at csiro.au> wrote:

>  Hi there,
>
>
>
> Somehow I get a gap along the zero degree while plot polar region plus
> using gsn_coordinates to plot grid lat/lon lines.
>
>
>
> Is there any way to fill that gap?
>
>
>
> The code that I use to plot the grid lines:
>
> ;---Data and grid read in:
>
>   mskFile = addfile("access.n96.newu2.nc","r")
>
>   vTemp = rm_single_dims(mskFile->NEWVAR2(0,0,:,::2))
>
>   vMTemp = vTemp
>
>
>
> ;---Call function to attach lat/lon lines.
>
>   pres                   = True
>
>   pres at gsnCoordsAsLines  = True        ; Default is points
>
>   pres at gsLineThicknessF  = .1
>
>   pres at gsLineColor       = "Gray25"
>
>   pres at gsnCoordsAttach  = True
>
>   gsn_coordinates(wks,plot1,vMTemp,pres)
>
>
>
>
>
> The input file information:
>
> ;---Ncdump the netcdf file:
>
> dimensions:
>
>         LONGITUDE = 192 ;
>
>         LATITUDE_1 = 144 ;
>
>         HYBRID_HT = 85 ;
>
> variables:
>
>         double LONGITUDE(LONGITUDE) ;
>
>                 LONGITUDE:units = "degrees_east" ;
>
>                 LONGITUDE:point_spacing = "even" ;
>
>                 LONGITUDE:modulo = " " ;
>
>                 LONGITUDE:axis = "X" ;
>
>         double LATITUDE_1(LATITUDE_1) ;
>
>                 LATITUDE_1:units = "degrees_north" ;
>
>                 LATITUDE_1:point_spacing = "even" ;
>
>                 LATITUDE_1:axis = "Y" ;
>
>         float NEWVAR2(T, HYBRID_HT, LATITUDE_1, LONGITUDE) ;
>
>                 NEWVAR2:missing_value = -1.e+34f ;
>
>                 NEWVAR2:_FillValue = -1.e+34f ;
>
>                 NEWVAR2:long_name = "U[G=NEW_GRID]" ;
>
>                 NEWVAR2:history = "From access.n96.uv" ;
>
>
>
>
>
> Regards,
>
>
>
> Arnold
>
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