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我是 postGIS 的新手，在这些查询中打破了我的头脑......我需要一些帮助

我有两个表，第一个country(cid int,countryname text,coutrycoordinates geometry)，另一个是state(sid int,statename text,statecoordinates geometry)我必须使用ST_contains国内的州写一个查询，但是我的查询不起作用

现在假设我已经插入

INSERT into country  VALUES (
1,'country1',
'POLYGON ((1 5,4 5,4 7,1 7,1 5))');

INSERT into state  VALUES (
1,'state1',
'POLYGON ((2 5,3 5,3 6,2 6,2 5))');

工作并被插入，但是为几何列存储的值是这种类型的

01030000000100000005000000000000000000F03F000000000000F03F000000000000F03F0000000000001040000000000000104000000000000010400000000000001040000000000000F03F000000000000F03F000000000000F03F for country and 

010300000001000000050000000000000000000040000000000000004000000000000000400000000000000840000000000000084000000000000008400000000000000840000000000000004000000000000000400000000000000040  for state in the postreSQL db

我有一个带有 2 个文本字段的网页和一个带有和的下拉菜单，ST_Contains单击 ST_Intersects时的提交按钮应显示状态是否位于该国家/地区。

select c.cid  from country as c, state as s  where ST_Contains('POLYGON ((1 1,1 4,4 4,4 1,1 1))', 'POLYGON ((2 2,2 3, 3 3, 3 2, 2 2))')

以上工作，但选择了两个表中的所有行交叉连接，而不仅仅是那个c.cid.

select c.cid from country as c, state as s  where ST_Contains(
01030000000100000005000000000000000000F03F000000000000F03F000000000000F03F0000000000001040000000000000104000000000000010400000000000001040000000000000F03F000000000000F03F000000000000F03F, 010300000001000000050000000000000000000040000000000000004000000000000000400000000000000840000000000000084000000000000008400000000000000840000000000000004000000000000000400000000000000040)

如果这是查询，则返回错误

NOTICE:  identifier "f03f000000000000f03f000000000000f03f0000000000001040000000000000104000000000000010400000000000001040000000000000f03f000000000000f03f000000000000f03f" will be truncated to "f03f000000000000f03f000000000000f03f000000000000104000000000000"
ERROR:  syntax error at or near "F03F000000000000F03F000000000000F03F0000000000001040000000000000104000000000000010400000000000001040000000000000F03F000000000000F03F000000000000F03F"
LINE 2: 01030000000100000005000000000000000000F03F000000000000F03F00...
                                              ^

这是在我编写此代码的 php 页面中执行的那个

我可以知道我哪里错了。

4

1 回答 1

1

你快到了，只是缺少引号：

select c.cid from country as c, state as s  where ST_Contains(
'01030000000100000005000000000000000000F03F000000000000F03F000000000000F03F0000000000001040000000000000104000000000000010400000000000001040000000000000F03F000000000000F03F000000000000F03F', '010300000001000000050000000000000000000040000000000000004000000000000000400000000000000840000000000000084000000000000008400000000000000840000000000000004000000000000000400000000000000040')

“奇怪”的几何是因为 Postgres 将 Polygon 转换为几何。您可以使用ST_AsText()再次将它们转换为文本

SELECT ST_AsText( state1 ) FROM state;
于 2013-07-22T07:24:30.730 回答