使用此空间查询,我试图获取与 78,22 点相交的所有国家/地区信息。预期结果是“印度”的信息,但此查询未返回任何行。
select * from countryspatial
where
geom.STIntersects((geometry::STGeomFromText('POINT (78 22)', 4326)))>0;
这是表定义:
CREATE TABLE [dbo].[CountrySpatial](
[ID] [int] IDENTITY(1,1) NOT NULL,
[ObjectID] [bigint] NULL,
[FIPS_CNTRY] [nvarchar](255) NULL,
[GMI_CNTRY] [nvarchar](255) NULL,
[ISO_2DIGIT] [nvarchar](255) NULL,
[ISO_3DIGIT] [nvarchar](255) NULL,
[ISO_NUM] [int] NULL,
[CNTRY_NAME] [nvarchar](255) NULL,
[LONG_NAME] [nvarchar](255) NULL,
[ISOSHRTNAM] [nvarchar](255) NULL,
[UNSHRTNAM] [nvarchar](255) NULL,
[LOCSHRTNAM] [nvarchar](255) NULL,
[LOCLNGNAM] [nvarchar](255) NULL,
[STATUS] [nvarchar](255) NULL,
[POP2005] [bigint] NULL,
[SQKM] [float] NULL,
[SQMI] [float] NULL,
[COLORMAP] [smallint] NULL,
[geom] [geometry] NULL,
PRIMARY KEY CLUSTERED
(
[ID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
ALTER TABLE [dbo].[CountrySpatial] WITH CHECK ADD CONSTRAINT [enforce_srid_geometry_CountrySpatial] CHECK (([geom].[STSrid]=(0)))
GO
ALTER TABLE [dbo].[CountrySpatial] CHECK CONSTRAINT [enforce_srid_geometry_CountrySpatial]
GO
最佳答案
首先要评论的是,地球表面的点应该使用 Geography 而不是 Geometry 来存储。存储和函数的工作方式存在差异(即使名称相似)
这是一个工作示例:
简化表:
CREATE TABLE CountrySpatial(
ID int IDENTITY(1,1) NOT NULL PRIMARY KEY,
geog geography NULL)
GO
在印度周围插入类似钻石的东西
INSERT INTO CountrySpatial(geog)
VALUES (geography::STGeomFromText('POLYGON((' +
'77.22702 28.67613, ' + -- new delhi (top)
'72.566071 23.059516, ' + -- ahmedabad (left)
'77.593689 13.005227, ' + -- bengaluru (bottom)
'88.374023 22.614011, ' + -- kolkata (right)
'77.22702 28.67613))', 4326));
找到匹配项。它与所寻求的点是联合的。 STBuffer 将点增加到 100 公里半径,以便在与找到的地理记录一起查看时显示(切换到输出中的空间选项卡)
select geog
from countryspatial
where geog.STIntersects(geography::STGeomFromText('POINT (78 22)', 4326))>0
union all
select geography::STGeomFromText('POINT (78 22)', 4326).STBuffer(100000)
关于sql-server - 在 SQL Server 2008 中使用 STIntersects 的问题,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/4772829/