Thread: [Matplotlib-users] [basemap] EASE grid projection

Hi,
I'd like to plot some EASE Grid global data (the EASE grid is defined for a
cylindrical equal area projection). In proj4 parlance, it is defined as

+proj=cea +lon_0=0 +lat_ts=30 +x_0=0 +y_0=0 +a=6371228 +b=6371228 +units=m
+no_defs

My data are gridded, and I want to use either pcolormesh or imshow to plot
them on a map. Apart from reprojecting into something that basemap deals
with natively, is there something else that I can do within
python/matplolib to plot the data without reprojecting it?

Thanks!
Jose

On 8/28/12 9:31 AM, Jose Gomez-Dans wrote:
> Hi,
> I'd like to plot some EASE Grid global data (the EASE grid is defined 
> for a cylindrical equal area projection). In proj4 parlance, it is 
> defined as
>
> +proj=cea +lon_0=0 +lat_ts=30 +x_0=0 +y_0=0 +a=6371228 +b=6371228 
> +units=m +no_defs
>
> My data are gridded, and I want to use either pcolormesh or imshow to 
> plot them on a map. Apart from reprojecting into something that 
> basemap deals with natively, is there something else that I can do 
> within python/matplolib to plot the data without reprojecting it?
>
> Thanks!
> Jose
>

Jose: Shouldn't be too hard to add support for that projection. Could 
you file a feature request at

https://github.com/matplotlib/basemap/issues  ??


-Jeff
>
>
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On 8/28/12 9:31 AM, Jose Gomez-Dans wrote:
> Hi,
> I'd like to plot some EASE Grid global data (the EASE grid is defined 
> for a cylindrical equal area projection). In proj4 parlance, it is 
> defined as
>
> +proj=cea +lon_0=0 +lat_ts=30 +x_0=0 +y_0=0 +a=6371228 +b=6371228 
> +units=m +no_defs
>
> My data are gridded, and I want to use either pcolormesh or imshow to 
> plot them on a map. Apart from reprojecting into something that 
> basemap deals with natively, is there something else that I can do 
> within python/matplolib to plot the data without reprojecting it?
>
> Thanks!hu
> Jose

Jose: I went ahead and added support for the 'cea' projection to pull 
request 73.

https://github.com/matplotlib/basemap/pull/73

You can get it by cloning my fork (https://github.com/jswhit/basemap).

-Jeff
>
>
>
> ------------------------------------------------------------------------------
> Live Security Virtual Conference
> Exclusive live event will cover all the ways today's security and
> threat landscape has changed and how IT managers can respond. Discussions
> will include endpoint security, mobile security and the latest in malware
> threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
>
>
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users


-- 
Jeffrey S. Whitaker         Phone  : (303)497-6313
Meteorologist               FAX    : (303)497-6449
NOAA/OAR/PSD  R/PSD1        Email  : Jef...@no...
325 Broadway                Office : Skaggs Research Cntr 1D-113
Boulder, CO, USA 80303-3328 Web    : http://tinyurl.com/5telg