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

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

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

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

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

????:1????????:??92949598??????

2????????

3??????????

4?????????

5?????

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

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

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

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