code: def to_kml(*args)
        xml, options = Geos::Helper.xml_options(*args)
  
        xml.LineString(:id => options[:id]) do
          xml.extrude(options[:extrude]) if options[:extrude]
          xml.tessellate(options[:tessellate]) if options[:tessellate]
          xml.altitudeMode(Geos::Helper.camelize(options[:altitude_mode])) if options[:altitudeMode]
          xml.coordinates do
            self.to_a.each do
              xml << (self.to_a.join(','))
            end
          end
        end
      end
docs: Build some XmlMarkup for KML. You can set various KML options like
   tessellate, altitudeMode, etc. Use Rails/Ruby-style code and it
   will be converted automatically, i.e. :altitudeMode, not
   :altitude_mode.