Geometry Boost List: [ggl] incorrect result for an intersection

Subject: [ggl] incorrect result for an intersection
From: Arash Partow (arash)
Date: 2011-04-17 05:42:01

Barend Gehrels wrote:
> No, a polygon with a hole and inside that hole an island must be presented as a multi-polygon (containing two outer rings).
>

I understand the requirement for multiple contours. The reason I ask is that gpc and wild-magic require the order of inner contours to be different to those containing them. For example if an outer boundary is clockwise, the hole would be counter-clockwise and the island would then be clockwise. in-short is order important for wkt?