there is sky lost at the calculator and the curing perimeter
overlap_preserving_projection is connectedness_preserving_projection. overlap_preserving_projection is not connectedness_preserving_projection. runway_touchdown_zone is not object_surface. connectedness_preserving_projection is dimension_preserving_projection. connectedness_preserving_projection is not dimension_preserving_projection. runway_touchdown_zone is object_surface. overlap_preserving_projection is not surface_projection. connectedness_preserving_projection is surface_projection. connectedness_preserving_projection is not surface_projection. overlap_preserving_projection is surface_projection.