Re: contour plot for small area (0.5 x0.5 degree)

Joeky

The generic function gsn_csm_contour() should work.

This will not give you a map outline, however. If your domain is coastal and you need an outline, then maybe overlaying the contour plot onto a map-only plot (gsn_cms_map()) of the RANGS hi-res coastline might work, but I've never done this so I've no idea.

Will

(Info on RANGS: http://www.ncl.ucar.edu/Document/Graphics/rangs.shtml)

From: juki juki <juky_emc2@yahoo.com<mailto:juky_emc2@yahoo.com>>
Reply-To: juki juki <juky_emc2@yahoo.com<mailto:juky_emc2@yahoo.com>>
Date: Tuesday, 21 May 2013 12:33 PM
To: Will Hobbs <will.hobbs@utas.edu.au<mailto:will.hobbs@utas.edu.au>>, "ncl-talk@ucar.edu<mailto:ncl-talk@ucar.edu>" <ncl-talk@ucar.edu<mailto:ncl-talk@ucar.edu>>
Subject: Re: contour plot for small area (0.5 x0.5 degree)

hi will,

 thank you for reply. The data resolution is 0.1o, but the max-min of latitude or longitude is only 1o. Therefore, it is not a single point, but 10x10 array with 0.1o resolution.

joeky

________________________________
From: Will Hobbs <Will.Hobbs@utas.edu.au<mailto:Will.Hobbs@utas.edu.au>>
To: juki juki <juky_emc2@yahoo.com<mailto:juky_emc2@yahoo.com>>; "ncl-talk@ucar.edu<mailto:ncl-talk@ucar.edu>" <ncl-talk@ucar.edu<mailto:ncl-talk@ucar.edu>>
Sent: Tuesday, May 21, 2013 11:24 AM
Subject: Re: contour plot for small area (0.5 x0.5 degree)

Joeky

If you have data with a 1 degree resolution, then there can only possibly be a single data point in a 0.5 x 0.5 degree domain. One cannot make a contour plot with a single data point.

You could interpolate your data onto a higher resolution domain (say, 0.1 degrees) and as long as there are reasonable zonal and meridional gradients in your domain that should work from an NCL point of view (i.e. you will get a contour plot). From a data analysis perspective, however, I would advise against that approach.

Will

From: juki juki <juky_emc2@yahoo.com<mailto:juky_emc2@yahoo.com>>
Reply-To: juki juki <juky_emc2@yahoo.com<mailto:juky_emc2@yahoo.com>>
Date: Tuesday, 21 May 2013 12:17 PM
To: "ncl-talk@ucar.edu<mailto:ncl-talk@ucar.edu>" <ncl-talk@ucar.edu<mailto:ncl-talk@ucar.edu>>
Subject: contour plot for small area (0.5 x0.5 degree)

Hi all ncl users;

I want to make a contour plot for small area (0.5x0.5 degree). What plot function can be used ? I try to use gsn_csm_contour_map_ce, it does not work because the longitude/latitude interval of my data are less than 1 degree.

Thanks for help
joeky

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Received on Mon May 20 20:47:29 2013