关键词: S-57, 电子海图, 文件读取, 改正, 物标信息

Abstract:

S-57 standard established by the International Hydrographic Organization is the main international standards for electronic chart file. Processing S-57 data set files is the basis of Electronic chart display and information system. Based on analyzing the theoretical data model, data structure and product specifications of S-57 standard, this paper implemented a library that is capable of loading, updating S-57 data set files and extracting object information. This library maintains the integrity of chart data in S-57 files, and approximately maintains the original logical data structure. It is able to extract integrity geometric information and to fetch attributes/class information of objects. The library has certain versatility for being independent of any userspecific data structure and format. It can be used for the base of the development of the electronic chart application system.

Key words: S-57;ENC;load file;update;object information