Re: [Matplotlib-users] geographic projection

[Jeff W. <js...@fa...>]

Lionel Roubeyrie wrote:
> Hi all,
> I try to play with the Basemap module, but I'm starting with two problems:
> 1- All my datas are in Lambert coordonates, and Basemap want  geographic 
> coords. Is there a way to automatically transforms the coords?
>   

Lionel:  Basemap does not require the data to be in geographic 
coordinates for plotting. It's quite easy to plot the data if it is 
already in projection coordinates.  I think your problem is probably 
related to the next point ...
> 2- Trying to set a shapefile in the plot, I get:
> ValueError: shapefile must have lat/lon vertices  - it looks like this one has 
> vertices in map projection coordinates
> Is the first question can be apply to shapefile?
>   

The shapefile interface is not very smart yet - it doesn't know how to 
deal with projections, so it just assumes the data is lon/lat.  If you 
can somehow load the data into python (perhaps by converting it to a 
text file?), then basemap should be quite happy to plot. it.

-Jeff


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