Re: [Matplotlib-users] Basemap transform_vector for decreasing latitudes

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

> kmanross <mailto:kev...@gm...>
> July 2, 2013 12:42 PM
> Greetings!
>
> Relative newbie here.
>
> I'm trying to plot wind vectors using basemap quiver and to fit my ortho
> projection. This is essentially a hack of Jeff Whitaker's animate.py found
> at
>
> https://github.com/matplotlib/basemap/blob/master/examples/animate.py
>
> The data source I'm connecting to, however, has the latitudes in 
> decreasing
> order, so I get the "lats and lons must be in increasing order!" exception
> when trying to use the transform_vector method which seems to be 
> required to
> fit the vectors to the projection. (ugliness occurs when failing to
> transform)
>
> What would be the best way to transform latitudes (to increasing) as 
> needed
> by transform_vector, while also accounting for the data order of my u 
> and v
> grids?
>
> -kevin.
>

Kevin:  Just flip the data around.

lats_flipped = lats[::-1,:]
data_flipeed = data[::-1,:] # assuming 2d array shape (nlats,nlons)


-Jeff
>
>
> --
> View this message in context: 
> http://matplotlib.1069221.n5.nabble.com/Basemap-transform-vector-for-decreasing-latitudes-tp41375.html
> Sent from the matplotlib - users mailing list archive at Nabble.com.
>
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