Re: Error occured during the running of ccplot in linux to plot

[Peter K. <pe...@pe...>]

Dear Ankan,

I think the problem is with the command line arguments. Instead of:

ccplot -o calipso1.png cmap/calipso-backscatter.cmap  calipso532-layer
/HDF/CAL_LID_L2_05kmCLay-Standard-V4-20.2006-06-13T07-20-12ZD_Subset.hdf

the command should be:

ccplot -o calipso1.png -c calipso-backscatter.cmap -x 0..500
calipso532-layer /HDF/CAL_LID_L2_05kmCLay-Standard-V4-20.2006-06-13T07-20-12ZD_Subset.hdf

Note the missing "-c", and also "cmap/calipso-backscatter.cmap" should
probably be "calipso-backscatter.cmap". "-x 0..200" may be needed to
select a smaller region - the image size would be too large for the
plotting library to make.

Can you try that?

Kind regards,

Peter

-- 
Dr. Peter Kuma

E-mail: pe...@pe...
PGP key: https://peterkuma.net/pgp/peterkuma.asc
Web: https://peterkuma.net/science

On Tue, 13 Jul 2021 10:22:39 +0530
ANKAN SARKAR <2th...@gm...> wrote:
>   Dear Sir/Madam,
>                             I have installed ccplot in Ubuntu 18.04
> LTS app on my PC (Windows 10). For the installation process, I
> followed the user guide which is available on the website
> (https://ccplot.org/download/). The steps I followed for the
> installation processes  are given below: 1. To install the required
> libraries and ccplot: sudo apt install --no-install-recommends
> python3 python3-dev gcc python3-distutils cython3 libhdf4-dev
> libhdfeos-dev python3-pil python3-numpy python3-matplotlib
> python3-mpltoolkits.basemap ttf-bitstream-vera
> 2.Build and install ccplot:
> tar xzf ccplot-1.5.6.tar.gz
> cd ccplot-1.5.6 sudo python3 setup.py install
> After that to check the version I simply run the 'ccplot -V' command
> to print the version of the ccplot and the output came is in the
> following:
> 
> ccplot 1.5.6
> 
> Third-party libraries:
> matplotlib 2.1.1
> basemap 1.1.0
> 
> Copyright (c) 2009-2015 Peter Kuma.
> This software is provided under the terms of a 2-clause BSD licence.
> 
> Now after that I wanted to make a plot from a  hdf file of CALIPSO
> data using ccplot as per the instruction given in the Chapter 6 of
> 'Visualising Data from CloudSat and CALIPSO Satellites'. I have made
> a directory named 'HDF' inside the folder 'ccplot-1.5.6.' where I put
> the hdf files I want to plot.
> 1. First I gave the command to know the information about the file
> 
> ccplot -i
> HDF/CAL_LID_L2_05kmCLay-Standard-V4-20.2006-06-13T07-20-12ZD_Subset.hdf
> and the output came
> 
> Type: CALIPSO
> Subtype: profile
> Time: 2006-06-13 07:44:32, 2006-06-13 07:47:00
> Height: -1815m, 39855m
> nray: 200
> nbin: 583
> Longitude: 84.06E, 86.27E
> Latitude: 21.55N, 30.46N
> So up to this step, I think this is working fine. But when I want to
> plot and give the command below it throws an error!
> ccplot -o calipso1.png cmap/calipso-backscatter.cmap  calipso532-layer
> /HDF/CAL_LID_L2_05kmCLay-Standard-V4-20.2006-06-13T07-20-12ZD_Subset.hdf
> 
> ccplot: calipso532-layer: HDF: SDstart failed: b'Bad file name on
> open'. Does it mean ccplot is not installed properly? Can anyone tell
> me why this is happening? And how to solve this problem? I am very
> new to this software tool and any help on this is  very much
> appreciable. Thank you.
> 
> Sincerely,
> Ankan Sarkar
> DST-INSPIRE Fellow
> National Institute of Technology Rourkela