Re: [Matplotlib-users] basemap plots

[<dd...@ja...>]

On Friday 07 July 2006 4:11 pm, Lionel Roubeyrie wrote:
> Hi all,
> Is it possible to import colormap file from GMT (.cpt) to basemap?
> If yes how can we do that?
> Thanks

It's possible. Here's how I've been doing it. 

(1) I use the gmtcolormapPylab function defined in: 
http://sourceforge.net/mailarchive/message.php?msg_id=11255878

(2) Using the above function and a GMT cpt file (e.g. 
GMT_no_green.cpt), I set a color dictionary as:
cdict = gmtcolormapPylab("GMT_no_green") 

(3) I define a colormap using:
mycmap = cm.colors.LinearSegmentedColormap("GMT_no_green",cdict,256)

(4) I apply the above using cmap=mycolormap in contourf or pcolormesh.

By the way, in case you don't know of the following site, it has an 
exhaustive selection of color palettes: http://cpt-city.org.uk/

I've also attached an example of a basemap image using a cpt from the 
above site. Masked values not defined by the colormap are shown in 
gray.