PostGIS 测试 - 建表，插入及查询数据

1.建表

    创建包含空间数据的表mytable。

CREATE TABLE mytable ( 
  id SERIAL PRIMARY KEY,
  name VARCHAR(128),
   geom GEOMETRY(Point, 26910)
);

2.添加GIST索引

CREATE INDEX mytable_gix  ON mytable USING GIST (geom); 

 3.插入数据

INSERT INTO mytable (name, geom) VALUES ('p1',
  ST_GeomFromText('POINT(0 0)', 26910)
);
INSERT INTO mytable (name,geom) VALUES ('p2',
  ST_GeomFromText('POINT(5 0)', 26910)
);
INSERT INTO mytable (name,geom) VALUES ('p3',
  ST_GeomFromText('POINT(0 10)', 26910)
);

4.查询

select id, name, ST_AsEwkt(geom) from mytable ;

     查询结果：

   

     查询与POINT(0 0) 相距 5以内的数据。

SELECT id, name, ST_AsEwkt(geom) FROM mytable WHERE ST_DWithin(
 geom, ST_GeomFromText('POINT(0 0)', 26910), 5);

     查询结果：