Dear Sirs, I think, all "lon"s in the file "radii.c" should read as "lat". regards, Kempelmann Elektroniksystem- und Logistik GmbH Dep VT - I, Dr. Helmut Kempelmann Einsteinstrasse 174 D-81675 Muenchen Tel +49 (89) 9216 - 24 94 Fax +49 (89) 9216 - 16 - 24 94 e-mail Helmut.Kempelmann at esg.de