See also: http://wiki.openstreetmap.org/index.php/Kosmos_AirNav_Rules#Obstructions_for_low-flying_charts
http://lists.openstreetmap.org/pipermail/talk/2008-November/031052.html (Tagging tall buildings) _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk