????:1????????????:????????

2?????

3????????????

4?????

5???????

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

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

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