摘要
针对栅格地图服务更新周期长,难以满足海图地图服务高频更新的需求,以及海图结构与可视化复杂等问题,本文基于矢量切片技术构建海图服务自动发布及更新方法。首先,设计从数据格式转换、变化数据识别更新、数据可视化预处理、数据分级预处理、数据切片配置、地图配置及服务更新发布的流程框架;其次,构建基于GDAL的S-57格式自动转换、多尺度离散海图数据向多级地图服务映射、海图数据-符号编码构建及处理等数据整合治理方法;最后,实现电子海图多样式和纸质海图样式的海图地图服务制作及更新,并通过对比实验验证可行性。结果表明,与传统栅格地图服务相比,基于矢量切片技术的海图地图服务无论在数据存储、更新效率等方面都有明显优势。
Addressing the limitations of grid map services,such as large volume,complex style updates,lengthy service update cycles,and intricate chart structures and visualizations,this paper explores a method system for the automated production,processing,and updating of chart services based on vector slicing technology.This article designs a comprehensive automation framework encompassing data conversion,data recognition and update,data visualization preprocessing,data grading preprocessing,data slicing configuration,map configuration,and service update publishing,and updating.Leveraging vector slicing services,we have introduced electronic and paper chart mapping styles for nautical map services.We constructed a data integration governance rule system,which includes the automatic conversion of S-57 format using GDAL,automatic stratification of electronic map levels for multi-scale discrete data,automatic processing of adaptive chart expression styles,and the construction and processing of chart data symbol encoding systems.We studied the chart mapping and slicing process based on vector slicing technology,proposed a technical method for converting vector tiles to grid tiles,and enhanced the efficiency of data slicing publication.Furthermore,we investigated an incremental change detection algorithm for nautical chart data,enabling rapid identification of data alteration areas,followed by updating data and map services for dissemination.The research content has been implemented in the“Civil Navigational Chart Maritime Service Platform”,offering services to the public and receiving unanimous acclaim from users.To validate the method's reliability,experimental comparisons were conducted under identical conditions for different service types,production,and updates.The findings indicate that vector slicing technology facilitates the automatic publishing and swift updating of nautical chart services,supporting features like data querying and hierarchical control.Compared to grid map services,the production efficiency of chart vector slicing services is increased by 1.75 times,with storage requirements reduced by 6.5 times.Notably,the service update offers approximately a 68%boost in production efficiency,proving the feasibility of the update approach.The ocean represents a crucial strategic resource,with chart data serving as the digital manifestation of marine information.To elevate the accessibility,applicability,and timeliness of chart data,this article employs vector slicing technology and geographic information systems to examine the entire production system and update techniques for chart services,encompassing data governance,map configuration,service deployment,and data renewal.This significantly enhances the production efficiency of chart services,shortens the update and slicing duration for nautical chart services,ameliorates the current state of nautical chart services,augments the application value of nautical chart data,establishes a robust service foundation for maritime and transportation capabilities,and supports diverse maritime endeavors.
作者
严怀志
魏海洋
丁广瑞
朱利安
彭长江
YAN Huaizhi;WEI Haiyang;DING Guangrui;ZHU Li’an;PENG Changjiang(Shanghai Nautical Chart Center of Donghai Navigation Safety Administration,Shanghai 200090,China;Geo-compass Information Technology Co.,Ltd.,Beijing 100089,China)
出处
《时空信息学报》
2024年第4期553-561,共9页
JOURNAL OF SPATIO-TEMPORAL INFORMATION
