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

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

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

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

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