如何将 POINTS(LANG, LAT) 存储到 PostGIS 中的几何类型列中？

Question

我在 PostGIS 中创建了一个 table itapp_cities 来存储城市的数据。我添加了数据类型为 geometry 的列 location 来存储城市的 longitude 和 latitude。当我运行以下 INSERT 查询时，我得到如下所示的错误。

INSERT查询：

INSERT INTO itapp_cities(city_id, city_name, city_code, state_id, location) 
  VALUES (DEFAULT,'Ada', 'ada-ok',37,POINT(34.774531000000003, -96.678344899999999));

Table定义：

CREATE TABLE itapp_cities
(
  city_id bigserial NOT NULL,
  city_name character varying(100) NOT NULL,
  city_code character varying(5) NOT NULL DEFAULT ''::character varying,
  state_id bigint NOT NULL,
  location geometry,
  CONSTRAINT itapp_cities_pkey PRIMARY KEY (city_id),
  CONSTRAINT fk_states FOREIGN KEY (city_id)
      REFERENCES itapp_states (id) MATCH SIMPLE
      ON UPDATE NO ACTION ON DELETE CASCADE
)

错误：

ERROR:  column "location" is of type geometry but expression is of type point
LINE 2:   VALUES (DEFAULT,'Ada', 'ada-ok',37,POINT(34.77453100000000...
                                             ^
HINT:  You will need to rewrite or cast the expression.
********** Error **********

ERROR: column "location" is of type geometry but expression is of type point
SQL state: 42804

如何在此列中存储点值？我是 PostGIS 的新手所以请原谅我这个愚蠢的问题

Answer 1

试试这个 SQL 并将其与您的插入 sql 查询匹配

    INSERT INTO itapp_cities(city_id, city_name, slug, state_id, location) 
  VALUES (DEFAULT,'Ada', 'ada-ok',37,st_GeomFromText('POINT(34.774531000000003 -96.678344899999999)', 312));

有关详细信息，请阅读此 link

Answer 2

您可以使用函数 ST_MakePoint() and the set the SRID (Spatial Reference System Identifier) with ST_SetSRID():

SELECT ST_SetSRID(ST_MakePoint(longitude, latitude),4326)

或者当您输入文字值时，将字符串表示形式提供给 ST_GeomFromText():

SELECT ST_GeomFromText('SRID=4326;POINT(34.774531 -96.6783449)')

dba.SE 上的相关答案，包含更多详细信息和链接：

Order by distance

Answer 3

根据 postGIS 文档，您的原始插入已关闭。只需在 POINT 表达式周围添加 '。

INSERT INTO itapp_cities(city_id, city_name, city_code, state_id, location) 
  VALUES (DEFAULT,'Ada', 'ada-ok',37,'POINT(34.774531000000003, -96.678344899999999)');

http://postgis.net/workshops/postgis-intro/geometries.html

如何将 POINTS(LANG, LAT) 存储到 PostGIS 中的几何类型列中？

How to store POINTS(LANG, LAT) into geometry type column in PostGIS?

database

postgresql

types

postgis