The content of chapter 2 is the foundation of building up electronic chart database.
本文第二章的内容是建立电子海图数据库的基础。
As the basic of electronic chart application system, ECDB (electronic chart Database) decides the function and performance of the system.
电子海图数据库是电子海图应用系统的基础，它决定了电子海图应用系统的功能和性能。
As the basic of electronic chart application system, ECDB (electronic chart Database) decides the function and performance of the system.
电子海图数据库是电子海图应用系统的基础，它决定了电子海图应用系统的功能和性能。
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