PostGIS操作

PostGIS操作数据库

• 创建

CREATE USER gisdb WITH SUPERUSER PASSWORD 'gisdb';
CREATE TABLESPACE gisdb OWNER gisdb LOCATION 'D:\data';
CREATE DATABASE gisdb OWNER gisdb TABLESPACE gisdb;
\c gisdb
-- Enable PostGIS (includes raster)
CREATE EXTENSION postgis;

• 删除

DROP DATABASE gisdb;
DROP USER gisdb;

• 命令行登陆

psql -h localhost -U username -d dbname

• 切换数据库

\c dbname username serverIP port

PostGIS操作语句

空间操作以 ST(spatial type)开头

• 查询数据库PostGIS版本信息

SELECT postgis_full_version()

• 查询要素类型

select GeometryType(geom) from towns

• 查询要素总面积

select ST_Area(ST_Union(geom)) from towns

• 从WKB查询WKT(字段中存储的是WKB)

SELECT ST_AsText(ST_GeomFromWKB(geom)) FROM towns WHERE town = 'BOSTON';

转载自：https://blog.csdn.net/xiezhongkai08/article/details/71106543