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

????:???????100?????:???????

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

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

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