# File lib/geo_ruby/simple_features/envelope.rb, line 93
      def as_kml(options = {})
        geom_data = ""
        geom_data = "<altitudeMode>#{options[:altitude_mode]}</altitudeMode>\n" if options[:altitude_mode]
        
        allow_z = with_z && (!options[:altitude_mode].nil?) && options[:atitude_mode] != "clampToGround"
        
        kml_representation(options.merge(:geom_data => geom_data,:allow_z => allow_z))
      end