# File lib/geo_ruby/simple_features/ewkb_parser.rb, line 158
      def decode_hex(hexewkb)
        result=""
        num_bytes = (hexewkb.size + 1) / 2
        0.upto(num_bytes-1) do |i|
          result << hexewkb[i*2,2].hex
        end
        result
      end