Tickmark labels on map

Hi!

In "Map tickmark" example 3
(http://www.ncl.ucar.edu/Applications/Images/mptick_3_lg.png), is there
a way to control the spacing of the tick mark labels? I would like to
have tick mark labels every one degree only, but I do not seem to find
the correct resource. The map is NOT cylindrical equidistant.

Thanks much!
Andrea

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Andrea N. Hahmann, Ph.D.
Research Applications Laboratory
Natl. Center for Atmospheric Research      Phone: 1-303-497-8383
PO BOX 3000                                Fax:   1-303-497-8401
Boulder, CO 80301                          hahmann_at_ucar.edu
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