On 11/16/2011 03:16 PM, Gökhan Sever wrote:
> Hi,
>
> Using the example code shown below I can't get meridians plotted on the
> screen:
>
> from mpl_toolkits.basemap import Basemap
> import matplotlib.pyplot as plt
> import numpy as np
>
> m = Basemap(projection='merc',lon_0=-79, lat_0=25.5,
>              llcrnrlon=-93, urcrnrlon=-63, llcrnrlat=14, urcrnrlat=36.2)
>
> m.drawcoastlines(linewidth=0.3)
> parallels = np.arange(0.,90,2.)
> m.drawparallels(parallels, labels=[1,0,0,0])
> meridians = np.arange(180.,360.,5.)

It can't handle the wrap; subtract 360 from your meridians, and they 
will show up.

Eric

> m.drawmeridians(meridians, labels=[0,0,0,1])
>
> plt.show()
>
> Two other projections "laea" and "tmerc" work fine for this case.
>
> Any ideas?
>
> Thanks.
>
>
> --
> Gökhan
>
>
>
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