On Wed, Dec 05, GerdP wrote:
Thorsten Kukuk wrote
Yes, I think the problem is if you cross 180. Maybe if the data is going from ~-180 to ~180, we should check what the latest node from the right is, and what the latest node from the left is, and exclude the empty middle?
I thought the same and coded that before, but the problem would be the same if you use a polygon containing e.g. all countries using french as the national language. I think it is not good enough to creae two distinct areas if the original polygon contained more than two, and guessing the original polygon is not trivial, esp. not if it contains small areas around islands.
Ok, but I can create the problem with only _one_ polygone, which contains only Alaska, too. The problem is if a polygone has to cross -180/180 longitude. Ok, due to the design, it will always be two polygons ... Thorsten -- Thorsten Kukuk, Project Manager/Release Manager SLES SUSE LINUX Products GmbH, Maxfeldstr. 5, D-90409 Nuernberg GF: Jeff Hawn, Jennifer Guild, Felix Imendörffer, HRB 16746 (AG Nürnberg)