Re: [ferret_users] big file issue?

[Ansley Manke <ansley.b.manke@xxxxxxxx>]

Hi,
Thank you for the report. We had seen something like this ourselves and have made a fix to it. The upcoming Ferret release v6.85 will likely fix it.

Note that your plot will not have the resolution to show 43200 distinct values - the graphics image typically has less than 1000 pixels in each direction. Now, a quick SHADE plot is useful for seeing what's in a variable. I do it myself all the time.  But you'll see just as much detail with a command such as:

   yes? SHADE/x=-180:180 SOILTYPE[i=1:43200:40,j=1:21600:30]

Ansley

On 11/12/2013 9:27 AM, Kaduk, Joerg (Dr.) wrote:

Hello,

 

I was wondering whether I hit some kind of limit with the data file below.

Any suggestions welcome!

 

Thank you very much,

Cheers,

Joerg

 

So this is my file – 3.7 Gb to save you the counting

-r-------- 1 jk61  nfsnobody 3733003888 Nov 12 16:31 hwsd1.21type.nc

 

[jk61@alice01 HWSD1.21]$ ncdump -h hwsd1.21type.nc

netcdf hwsd1.21type {

dimensions:

                Longitude = 43200 ;

                Latitude = 21600 ;

variables:

                double Longitude(Longitude) ;

                                Longitude:Units = "DegreeE" ;

                double Latitude(Latitude) ;

                                Latitude:Units = "DegreeN" ;

                int Soiltype(Latitude, Longitude) ;

}

 

I am using

                FERRET v6.84  

                Linux 2.6.32-358.11.1.el6.x86_64 64-bit - 09/05/13

 

yes? use hwsd1.21type.nc

yes? show data

     currently SET data sets:

    1> ./hwsd1.21type.nc  (default)

name     title                             I         J         K         L         M         N

SOILTYPE                                  1:43200   1:21600   ...       ...   

 

yes? shade SOILTYPE[x=-180:180]

gives me the output below

 

However

shade SOILTYPE[x=0:180]

 

results in

 

 

 

 

 

 

Jörg Kaduk

Senior lecturer

http://www.geog.le.ac.uk/staff/jk61/

t: +44 (0)116 252 3848

Department of Geography, University of Leicester, University Road, Leicester LE1 7RH, UK

 

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