[ncl-talk] Lat, Lon map using Ascii file

[HAVENER, KEVIN F GS-12 USAF AFWA 14 WS/WXED]

I'd start with http://www.ncl.ucar.edu/Applications/read_ascii.shtml  Example 6 probably is close to what you want to do.

Kevin


-----Original Message-----
From: ncl-talk-bounces at ucar.edu [mailto:ncl-talk-bounces at ucar.edu] On Behalf Of Kunal Bali
Sent: Monday, September 22, 2014 12:40 PM
Cc: ncl-talk at ucar.edu
Subject: Re: [ncl-talk] Lat, Lon map using Ascii file

I have the file which has dimensions 64800x3 as you can below. The data file has 3 variables (Latitude Longitude TotCH4_A). So 64800 is the nLatitude and nLongitude. The data range is from Latitude (90,-90) and Longitude (-180, 180). So now how can i use ascii file in ncl map plotting. and also if possible please let me know how can i convert ascii file to netcdf file in NCL. provides me link ??


ncl 5> printVarSummary(data)                                            

Variable: data
Type: float
Total Size: 777600 bytes
            194400 values
Number of Dimensions: 2
Dimensions and sizes:    [64800] x [3]
Coordinates: 
Number Of Attributes: 1
  _FillValue :    9.96921e+36


Thank You


Kunal Bali

Research Scholar 

Radio & Atmospheric Science Division 

CSIR - National Physical Laboratory

New Delhi - 110012










On Mon, Sep 22, 2014 at 9:08 PM, Maria Gehne - NOAA Affiliate <maria.gehne at noaa.gov> wrote:


	Hi Kunal,

	your data array has dimensions 64800x3. Which one of these is latitude and longitude? Most likely 64800 is nlat*nlon, but you need to figure that out first. Also you need to know what the actual values for the latitudes and longitudes are. All of this information could be in the ascii file or you need additional information for you ascii file. In order to use the NCL map plotting functions you data array needs to have the coordinate variables attached to it.

	Responses to NCL-talk only please.
	Maria

	On Sun, Sep 21, 2014 at 12:15 AM, Kunal Bali <kunal.bali9 at gmail.com> wrote:
	

		Dear NCL users
		
		
		I want to plot the Lat, Lon map using using ASCII file in NCL. But i am not getting how to do it. I am able to read the ascii file and the summary is like that 
		
		ncl 5> printVarSummary(data)                                            
		
		Variable: data
		Type: float
		Total Size: 777600 bytes
		            194400 values
		Number of Dimensions: 2
		Dimensions and sizes:    [64800] x [3]
		Coordinates: 
		Number Of Attributes: 1
		  _FillValue :    9.96921e+36
		
		 
		AND 
		
		Variable name  = TotCH4_A
		

		So if I want to plot the map from txt file how could do it. Could you provide me an example ??
		

		Thank You
		
		
		Kunal Bali
		
		Research Scholar 
		
		Radio & Atmospheric Science Division 
		
		CSIR - National Physical Laboratory
		
		New Delhi - 110012
		
		




		
		


		_______________________________________________
		ncl-talk mailing list
		List instructions, subscriber options, unsubscribe:
		http://mailman.ucar.edu/mailman/listinfo/ncl-talk