[postgis-users] [postgis-devel] Sphere or Spheroid

[Richard Greenwood]

On Fri, Oct 30, 2009 at 5:48 PM, Paragon Corporation <lr at pcorp.us> wrote:
>
> The choice of default sphere vs. spheroid is probably something we should
> ask the general PostGIS users group so cc'ing them since more people
> frequent that list that would have strong opinions on this subject.
>
> So question folks -- is which do you prefer as default behavior for new
> geography data type
>
> faster sphere calculation (with 0.05% - 1% margin error) (I vaguely recall
> that's what my studies suggested around the globe compared to UTM)
>
> or
> slower more accurate spheroid calculation

I think that the default should be to "do it right" and that "doing it
fast" should be optional.

-- 
Richard Greenwood
richard.greenwood at gmail.com
www.greenwoodmap.com