在港航地理信息系统中,针对原水深基面转换的不足,本文提出基于港航地理信息系统的水深转换模型的解决方案。通过分析提出采用简易模型、简易模型配合航线走向,求取权值法、分带理论、潮波延伸理论的潮差比和最小二乘法进行解决,并进行水深基准面转换的模块设计,在港航GIS系统中进行数据实例检验。 In the port of geographic information system, in order to deal with the shortage of deep-water conversion of raw water, a solution of water depth conversion model based on port geographic information system (GIS) is proposed in this paper. Through the analysis, a simple model, a simple model with the course of the route, the weight method, the zoning theory, the tidal deviation ratio of the wave extension theory and the least squares method are proposed to solve the problem. The module design of water depth datum conversion is carried out. Air GIS system for data instance test.