KXKY specifies the size of a grid as two numbers separated by a
kx ; ky
These numbers are KX and KY, which represent the number of grid points
in the x- and y- directions.
If the projection is CED, these numbers may be DELTAX and DELTAY, the
grid spacing in degrees in the x and y directions. If the spacing is
input, the first character in KXKY must be #. For example:
KXKY = #2.5;2.0
will create a grid with 2.5 degree spacing in x (longitude) and 2.0
degree spacing in y (latitude).