There isn't a standard, but you can force your polygons into an orientation with ST_ForceRHR, which forces a clockwise orientation for exterior rings and anti-clockwise for interior rings.
P On Tue, Mar 10, 2009 at 3:20 PM, Rick <[email protected]> wrote: > I'm fairly new to this. > > I have a requirement to do calculations on runways in aerodrome maps. > I orient the runway centerlines west to east so that the low runway > number is at the start of the line. > > I'm doing a similar, more complex normalization to the runway outline, > the first vector crosses the start of the centerline. Whether they > are clockwise or ccw doesn't matter to me as long as it is always the > same. Is there a standard insidedness for polygons which would > dictate a direction? > > -- > Cheers! > Rick. > _______________________________________________ > postgis-users mailing list > [email protected] > http://postgis.refractions.net/mailman/listinfo/postgis-users > _______________________________________________ postgis-users mailing list [email protected] http://postgis.refractions.net/mailman/listinfo/postgis-users
