???????????????????????

????:?????????:????

??7????31?????????? (?? ?)31??????????????????,??±800??(??:??????????????±800??)??????????????,????500????????????????GIS??,???????±800??????????????????????????

??,?????±800??“???????”??????,???????????±800??,?????????????????????????????????????5????????????????,????±800????,?????2290???????,?????????????????800??????????6??,????????????400????“?????”?????????????????

????±800????,????60???????????,????????????????,?360??,????,???±800??????????????1020??????,??50%,???????600?????,??1650???,????????????(?????) ????:???