Reply to thread

I'd say the best approach would to make two ellipses for the longitude lines. One small and one large. On the small elipse use a large stroke and on the large ellipse use a small stroke. Use the Blend Tool to create a number of duplicates between the two. In this example I used 15.

I used the same blend method on a series of arcs for the latitude lines. They could be reflected and copied for the other side. That's as far as my thinking takes me for any kind of automated approach. Frankly, I don't see any really easy way to get this done.

Obviously you need a circle shape behind the lines.