Abstract: The traditional electronic-chart relied way of mining data on ship's port visiting is not reliable for inland waters, because the charts for those area is more likely incomplete or out of date.In contrary, abundant semantic information about geographic space is included in on-line maps which can supplement ship trajectory data with wide range of location-associated interpretation.A method to get the semantic information by using the reverse geocoding service is developed.The ship track segments where the ship does not move are identified.Those segments are picked up if they are within a port, or beside a pier and the center of each segment is extracted.The set of matching zones is obtained by using the reverse geocoding service provided by on-line maps.The semantic information associated with ship staying places is obtained through calculating characteristic of ship staying for each zone and conducting fusing according to the keywords.The method is verified against real data from the Yangtze River in the period of July and August, 2018 and achieved average accuracy was better than 94%.