hydrographical

1.In the area, the factor of landform, ground vegetation and parent material and hydrographical condition were surveyed.

考察研究了样地形地貌、植被、母质和水文等成土因素；

2.Multi radar signal and AIS data can be merging displayed and integrated display radar signal, video map, hydrographical meteorology data and database file of the ship.

雷达信号、AIS数据进行融合显示，并综合显示雷达信号、视频地图、水文气象数据及船舶档案数据。