All these problems with RealType.Longitude are caused by
the automatic detection and correction of lines and polygons
that wrap.
Please try increasing the number of segments that you divide
your Longitude spans into. If 4 doesn't work for -190 to 190,
try 12 or something larger. Similarly for your slice: break
it into segments along its Longitude dimension. Another
alternative is to use a RealType other than Longitude, but
you may need some of its special logic.
Good luck,
Bill
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Bill Hibbard, SSEC, 1225 W. Dayton St., Madison, WI 53706
hibbard@xxxxxxxxxxxxxxxxx 608-263-4427 fax: 608-263-6738
http://www.ssec.wisc.edu/~billh/vis.html
