?12???21?????????????????????? ??????,????????20?????????

??,??????,????????????????????????,??????????????????????????????

????,???,??????20???????45?????????23?????????????????????????????

?,??????????“2GIS”?????????????????????????,?19?,?????????????????????(???????) ???:??????????? “?????????????”????

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

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

2?????????

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

4???????????

5???????

?12???21?????????????????????? ??????,????????20?????????

??,??????,????????????????????????,??????????????????????????????

????,???,??????20???????45?????????23?????????????????????????????

?,??????????“2GIS”?????????????????????????,?19?,?????????????????????(???????) ???:???????????