No, it looks like the PostGIS point-in-polygon shortcut uses Dan Sunday's algorithm, "Fast Winding Number Inclusion of a
Point in a Polygon".
http://softsurfer.com/Archive/algorithm_0103/algorithm_0103.htm#Winding%20Number
-- Kevin
Sufficool, Stanley wrote:
Does ring orientation matter when you are calculating point in poly?
When you calc a point in poly, do you take the sum of vertex angles from
point to poly vertex and if sum of angles is >= 360 then point is in
poly?
_______________________________________________
postgis-users mailing list
[email protected]
http://postgis.refractions.net/mailman/listinfo/postgis-users
