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

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

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

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

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

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

2????spa?????

3??????????

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

5?????????????

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

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

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

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