Theerasak Photha wrote: > I'm not in kolluge yet and I just learned about linear interpolation > today---although I don't think it would necessarily apply to this > problem, where the increments set by the grid might be more discrete > than the line itself
that's usually solved by stepping along the grid in one direction, and interpolating in the other. </F> -- http://mail.python.org/mailman/listinfo/python-list