Here is Garlic2 script, which enables longitude curves to also be created.
Network may be used if there are both latitude and longitude curves.

In order to plot only longitude curves, set uDensity = 0 and set vDensity > 1.
For 6 longitude curves, set vDensity to 7.

For just latitude curves, set vDensity to 0, and uDensity > 2.

- Brian