On Thu, 14 Jan 2010 12:27:04 +0100 (CET) Roger Bivand <roger.biv...@nhh.no> wrote: > So in principle geod.dist() and spDistsN1(..., longlat=TRUE) should yield > equivalent results, because their assumptions are the same. > > Several of the references suggest that the geographic pole should not be > input. It looks as though the oce implementation handles this more > gracefully than sp. > > Hope this helps,
It does. Thanks. BTW, is there a reason 'spDistsN1' handle longitude 360 different from longitude 0? For example, the distance between 0,0 and 0,0 is 0, but the distance between 0,0 and 360,0 is about 1e-12. This is of course not a problem; I was just wondering on the reason (since 360,0 is for all practical *correctly* handled -- it's just not handled equal to 0,0). -- Karl Ove Hufthammer _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo
