# File lib/dnsruby/resource/GPOS.rb, line 106
      def self.build_rdata(longitude, latitude, altitude)
        binary_string = ''.force_encoding('ASCII-8BIT')

        binary_string << longitude.length.chr
        binary_string << longitude
        binary_string << latitude.length.chr
        binary_string << latitude
        binary_string << altitude.length.chr
        binary_string << altitude
        binary_string
      end