QGIS draws a map - creating and editing drawing line features, generating area features from line features, editing area features

foreword

We demonstrate this part of the function with the case of depicting the urban area of ​​Beijing. The steps are roughly as follows:

1、按照市区分区的分界线来绘制线要素。
2、根据所绘线要素生成面要素。
3、对生成的面要素做整理编辑。

The base map to be drawn is shown in the figure:

1. Create and edit drawing line features

1.1 Create line features

We click 新建Shapefile要素the button to pop up a new element pop-up window, as shown in the figure:

We fill in the corresponding element information and explain the filled information:

文件名称：创建的shp文件的位置和名字
文件编码：一般选择跟随系统，即System
几何图形类型：根据自己需要来选
附加维度：根据需要来选
坐标系：选择和工程一样的坐标系
属性字段：根据自己需求来添加