Re: [Matplotlib-users] Contouring a large set of ungridded data

[Jesper L. <jl...@dm...>]

On Saturday 15 October 2005 01:10, Jeff Whitaker wrote:
> Jesper:  Since this question has come up a couple of times, I decided to
> cook up an example.  First you'll need to download and install the
> natgrid python module (included in CDAT, but I've separated it out from
> the huge tarball and put it at
> ftp://ftp.cdc.noaa.gov/Public/jsw/natgrid.tar.gz).  Then try this:

Sounds great. I tried your example and it works fine (though I had to modify 
the import nat statement to "from natgrid import nat").

The only problem for my application is that I would like the interpolation to 
be limited to areas near observations and avoiding extrapolation to areas far 
from observations. Is that possible - from the natgrid documentation that 
does not seem to be the case?

If it is not possible, I will probably try to do it as a postprocessing of the 
interpolated data (probably simply check if the nearest observation is within 
a given range).

-- Jesper