{
  "fields": [{"id":"_id","type":"int"},{"id":"1.0","type":"numeric"},{"id":"人工林","type":"text"}],
  "records": [
    [1,2,"天然林"],
    [2,3,"伐採跡地"],
    [3,4,"未立木地"],
    [4,5,"更新困難地"],
    [5,6,"竹林"],
    [6,7,"特殊林"]
]}