I've got some 2-D data that I'd like to contour only the zero line. However, the data is in the range of 0 to 100, definite, so I can't use the "lev=(-1,1,10)" idea. I'm stumped. Any suggestions? Thanks. -- Gary Strand Climate Change Research Section, NCAR (303) 497-1336 strandwg@ucar.edu http://www.cgd.ucar.edu/ccr/strandwg