On Tue, Sep 6, 2011 at 10:18 PM, Paragon Corporation <l...@pcorp.us> wrote: > Sarah, > > I'm having trouble making convex hulls that cross the international > dateline. Imagine 4 points making a square with the international dateline > running down the middle--I would like the convex hull to be that square, but > instead I get a giant rectangle that goes across the entire planet. I've > done some reading, and it sounds like GEOS generally has a hard time dealing > with the dateline--is that accurate? > Yes GEOS only deals with planar coordinates. Geography is the only > geodetic aware type and there is no ConvexHull function for it.
Although you could hack one up easily enough by copying the ideas in ST_Buffer(geography) P _______________________________________________ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
