On Fri, Sep 10, 2010 at 14:46, izzybitsie <isid...@juno.com> wrote: > I did not understand the need for me to write my own transformation > functions. I only used lat/lon->x/y for the points in the curve and the > polygon shows up OK. What should I write my own transformations for?
Because matplotlib (and possibly any other tool out there) have absolutely no idea what transformation have you used to generate your background picture in the first place. If you want to match grid of coordinates of you picture with the grid of coordinates of what you are trying to plot on top of it, you have to input this information somehow. And one possible way of doing this is taking a transformation function which will be exactly the same as one used to generate your background. I do not think there is some other, magical way of doing this. This is not a matplotlib specific problem, it is a general problem. But maybe someone else will correct me if I am wrong. JS ------------------------------------------------------------------------------ Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing http://p.sf.net/sfu/novell-sfdev2dev _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
