I am making the assumption here that the read operation (as an entry point to the API layer) is not in turn invoking write operations on the database.
我在此处假设读操作(作为api层的入口点)不会对数据库调用写操作。
It proposes method to realize map layer operation, double direction selection, database link, and analyzes amply in allusion to some technical difficulty thing and solve method in more exploiture.
给出地图图层操作、双向查询、数据库联接等功能的实现方法，并对二次开发中遇到的一些技术难点问题和解决方法进行了详细分析。
Map layer, graphics edit, database view, database structure operation, information search etc can operate this system.
本系统由图层操作、图形编辑、数据库浏览、数据库结构操作、信息查询等功能组成。
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