"Roger Donne" <roger@donne.free-online.co.uk> wrote: > Thanks for the feedback. I will make the link more intuitive. The > William Bartle polygon looks OK when I view it. However, when sharing > these files with other people, we have come across some problems in > getting the polygons to display properly. If the 'altitude' property > of the polygon is set to zero, it appears to be 'sunk' below the > surface. Giving it a few metres elevation (depending on local > topography) brings it into view, but sometimes it is only partially > visible. Regards: Roger Donne > Here's the way that the Bartle polygon looks on my computer: http://www.JustPhotos.ca/post/bartlepolygon.jpg As you suggested, I gave the polygon some altitude and the problem disappeared. The odd part is that even when I put the altitude back to 0 the polygon displayed OK. This seems very odd.