[ferret_users] Slippy maps from pyferret

[Patrick Brockmann <Patrick.Brockmann@xxxxxxxxxxxx>]

Hi all ferreters and pyferreters,

I have found interesting to explore how to generate slippy maps directly 
from pyferret.
Well, it seems to be possible and I have started to code a protype 
following this idea.
It is available from: https://github.com/PBrockmann/wms-pyferret

So, tiles are generated on the fly from "workers" of a gunicorn server 
(a python WSGI server)
that use pyferret for the rendering of the tiles. The server is launched 
the time the analysis is needed.
With 4 workers, the rendering is quite smooth.
A small application (html+js) run with nw (Node-Webkit) displays the 
slippy map using Leaflet.js map.

Thus, any variable read or computed from pyferret  could be rendered as 
a slippy map using
the classic ferret syntax we are used to.
I think it opens new perspectives (multiple synchronous maps for example).

By the way, I have succeed to get rid off the margins when generating 
the tiles
by a simple use of a
pyferret.run('go margins 0 0 0 0')

Regards
Patrick

--
LSCE/IPSL, Laboratoire CEA-CNRS-UVSQ
Data Analysis and Visualization Engineer
ICMC - IPSL Climate Modelling Centre
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