line导入postgis数据库

1、创建新的数据库a

      su postgres

      psql -p 5432

      create database a with owner dbuser(新建数据库a)

      Crtl+z回退

      psql -U dbuser -d a

      CREATE EXTENSION postgis

      CREATE EXTENSION postgis_topology

      CREATE EXTENSION pgrouting

2、QGIS绑定数据库a

      修改导入文件：

<!DOCTYPE connections>
<qgsPgConnections version="1.0">
    <postgis port="5432" saveUsername="true" password="dbuser" savePassword="true" sslmode="1" service="" username="dbuser" host="host名" database="a" name="a" estimatedMetadata="false"/>
</qgsPgConnections>

     导入到QGIS

3、line导入数据库a

      模式:public 表格:tbl_path 主键:id

      ALTER TABLE tbl_path ADD COLUMN "source" integer;

      ALTER TABLE tbl_path ADD COLUMN "target" integer;

      SELECT pgr_createTopology('tbl_path', 0.000002, 'geom', 'gid');

      ALTER TABLE tbl_path ADD COLUMN "length" float8;

      UPDATE tbl_path set length=ST_Length(geom);