基于GIS和AIS的渤海海上船舶活动时空特征分析
|
Spatio-temporal characteristics of ship activities in the Bohai Sea based on GIS and AIS
|
图7. 环渤海地区海洋生产总值与港口货物、集装箱吞吐量变化 |
Fig.7. Changes of gross marine product and port cargo, container throughput around the Bohai Sea |
![]() |