[ncl-talk] contour plot with 2d x,y locations ...

[Karin Meier-Fleischer]

Hi Ufuk,

the problem is that your calculated depth variable is a 2D variable which contains missing 
values and has varying values. If you insert print(depth) in your NCL script you will see the 
problem. For testing purpose you can define an array of 88 integers instead of using your 
depth variable: 

 res at sfXArray = date
 res at sfYArray = ispan(0,87,1)

By the way, it is unusual that a named dimension variable like DEPTH is not included in the
netCDF data file? If you are able to get the correct DEPTH data it should be not a problem 
to plot it with NCL.

Bye,
Karin

Am 17.11.2014 um 14:33 schrieb Ufuk Utku Turuncoglu (BE) <u.utku.turuncoglu at be.itu.edu.tr>:

> Thanks. Yes you are correct. I'll attach the correct one to this mail.
> 
> Regards,
> 
> --ufuk
> 
> 
> On 17/11/14 12:23, Karin Meier-Fleischer wrote:
>> Sorry, you appended the wrong data file.
>> 
>> 
>> Am 17.11.2014 um 10:15 schrieb Ufuk Utku Turuncoglu (BE) <u.utku.turuncoglu at be.itu.edu.tr>:
>> 
>>> Hi,
>>> 
>>> I am trying to create a contour plot from ocean float dataset but i could not create correct plot. To map data to x,y locations, i tried to use "TriangularMesh" resource but in this case gsn_csm_contour does not produce anything (just empty plot with weird axis). If i remove "TriangularMesh" definition, then NCL creates the plot but it does not create the axises and gives following warnings.
>>> 
>>> warning:PlotManagerSetValues: TickMark annotation cannot be added after NhlCreate
>>> warning:tmXBLabelFontHeightF is not a valid resource in plot_glpr_2d_contour.PlotManager at this time
>>> warning:tmYLLabelFontHeightF is not a valid resource in plot_glpr_2d_contour.PlotManager at this time
>>> 
>>> So, what is the correct way to create this kind of float plots.
>>> 
>>> PS: i also attached the data file to mail.
>>> 
>>> Thanks,
>>> Regards,
>>> 
>>> --ufuk
>>> 
>>> ;-----------------------------------------------------------
>>> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
>>> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
>>> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/contributed.ncl"
>>> ;-----------------------------------------------------------
>>> begin
>>>  ;--- parameters ---
>>>  ifile = "GL_PR_PF_1901200.nc"
>>> 
>>>  ;--- open file ---
>>>  nc1 = addfile(ifile, "r")
>>> 
>>>  ;--- read variables ---
>>>  time = nc1->TIME
>>>  pres = nc1->PRES
>>>  date = cd_calendar(time, 4)
>>>  plat = nc1->LATITUDE
>>>  plon = nc1->LONGITUDE
>>>  data = nc1->TEMP
>>> 
>>>  dims = dimsizes(pres)
>>>  ntime = plat(0)
>>>  nlev = plat(1)
>>> 
>>>  ;--- calculate depth from pressure ---
>>>  ;--- UNESCO Technical Papers in Marine Science No. 44 ---
>>>  ;--- http://www.seabird.com/document/an69-conversion-pressure-depth ---
>>>  x = (sin(plat/57.29578))^2
>>>  x2d = conform(pres, x, (/ 0 /))
>>>  g = 9.780318*(1.0+(5.2788e-3+2.36e-5*x2d)*x2d)+1.092e-6*pres
>>>  depth = pres
>>>  depth = ((((-1.82e-15*pres+2.279e-10)*pres-2.2512e-5)*pres+9.72659)*pres)/g
>>> 
>>>  ;--- plot data ---
>>>  wks  = gsn_open_wks ("newpdf", "plot_glpr_2d")
>>>  gsn_define_colormap (wks, "matlab_jet")
>>>  i = NhlNewColor(wks,0.8,0.8,0.8)
>>> 
>>>  res = True
>>>  res at vpHeightF = 0.15
>>>  res at vpWidthF = 0.75
>>>  res at tiYAxisString = "Depth (m)"
>>>  res at tiXAxisString = "Time"
>>>  res at gsnLeftString = ""
>>>  res at gsnRightString = ""
>>>  res at gsnSpreadColors = True
>>>  res at gsnSpreadColorEnd = -3
>>>  res at cnFillOn = True
>>>  res at cnFillMode = "RasterFill"
>>>  res at cnInfoLabelOn = False
>>>  res at cnLinesOn = False
>>>  res at cnLineLabelsOn = False
>>>  res at lbLabelBarOn = False
>>>  res at pmTickMarkDisplayMode = "Always"
>>>  res at tiXAxisFontHeightF = 0.008
>>>  res at tiYAxisFontHeightF = 0.008
>>>  res at tmXBLabelFontHeightF = 0.008
>>>  res at tmYLLabelFontHeightF = 0.008
>>> 
>>>  xa = conform(pres, date, (/ 0 /))
>>>  copy_VarCoords(pres, xa)
>>>  xa = mask(xa, ismissing(depth), False)
>>>  res at sfXArray = xa(DEPTH|:,TIME|:)
>>>  res at sfYArray = depth(DEPTH|:,TIME|:)
>>>  res at trGridType = "TriangularMesh"
>>>  res at trYReverse = True
>>> 
>>>  plot1 = gsn_csm_contour(wks, data(DEPTH|:,TIME|:), res)
>>> end
>>> <GL_TS_PF_1901200.nc>_______________________________________________
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>> ____________________________________
>> Dipl. Geophys. Karin Meier-Fleischer
>> Visualisierung
>> Abteilung Anwendungen
>> 
>> Deutsches Klimarechenzentrum GmbH (DKRZ)
>> Bundesstrasse 45a * D-20146 Hamburg
>> Germany
>> 
>> Phone:	+49 (0)40 460094 126
>> Fax:	+49 (0)40 460094 270
>> E-Mail:	meier-fleischer at dkrz.de
>> URL:	http://www.dkrz.de/
>> 
>> Geschäftsführer: Prof. Dr. Thomas Ludwig
>> Sitz der Gesellschaft: Hamburg
>> Amtsgericht Hamburg HRB 39784
>> 
>> 
>> 
>> 
> 
> <GL_PR_PF_1901200.nc>

____________________________________
Dipl. Geophys. Karin Meier-Fleischer
Visualisierung
Abteilung Anwendungen

Deutsches Klimarechenzentrum GmbH (DKRZ)
Bundesstrasse 45a * D-20146 Hamburg                          
Germany                                

Phone:	+49 (0)40 460094 126
Fax:	+49 (0)40 460094 270
E-Mail:	meier-fleischer at dkrz.de
URL:	http://www.dkrz.de/

Geschäftsführer: Prof. Dr. Thomas Ludwig
Sitz der Gesellschaft: Hamburg
Amtsgericht Hamburg HRB 39784