1 建表

create table city (
  fid serial primary key,
  city_name VARCHAR(255),
  geom geometry
)

2 插入数据

INSERT INTO city ( city_name, geom )
VALUES (‘北京‘, st_geomfromtext(‘LINESTRING(0 0,1 1)‘, 4326));

insert into city(city_name,geom)
values(‘test‘,‘SRID=4326;polygon((112.784684 28.051125,省略省略省略省略省略,112.66978 28.205104))‘)

3 空间参考

3.1 查询空间参考

select st_srid(geom) from city;

3.2 更新空间参考

select UpdateGeometrySRID(‘city‘, ‘geom‘, 4326);

空间数据实战（2）——pgsql