问题1下面数据是使用默认格式输出的数据，请问数据中那些9代表什么东西？
15756862.000 4761769.500999999999999 6 1
15757073.000 4762585.500999999999999 7 1
15757262.000 4763411.000999999999999 7 1
15757411.000 4764221.000999999999999 7 1
15757521.000 4765031.000999999999999 7 1
15757623.000 4765848.500999999999999 7 1
15757757.000 4765848.500999999999999 7 1
15757655.000 4765062.500999999999999 7 1
15757521.000 4764236.500999999999999 7 1
15757380.000 4763403.500999999999999 7 1
15757230.000 4762617.000999999999999 7 1
15757012.000 4761801.500999999999999 7 1
15756819.000 4760964.500999999999999 7 1
15756712.000 4760481.000999999999999 7 1
15756561.000 4760470.500999999999999 7 1
15756669.000 4760953.500999999999999 8 1
15764950.000 4766391.000999999999999 6 2
15764783.000 4765572.500999999999999 7 2
15764569.000 4764735.500999999999999 7 2
15764355.000 4763907.500999999999999 7 2
15764085.000 4763107.500999999999999 7 2
15763764.000 4762241.500999999999999 7 2
15763432.000 4761243.500999999999999 7 2
15763636.000 4761361.500999999999999 7 2
15763936.000 4762220.000999999999999 7 2
15764234.000 4763079.500999999999999 7 2
15764522.000 4763935.500999999999999 7 2
15764727.000 4764735.500999999999999 7 2
15764913.000 4765554.000999999999999 7 2
15765099.000 4766382.000999999999999 8 2
问题2default格式文件保存在什么位置？
