假设你的表名为spatial_data,目标字段名为geom,该字段存储了坐标系为4326的multilinestring数据。 使用ST_AsText提取坐标: 使用ST_AsText函数将multilinestring数据转换为文本格式,这样你可以更容易地处理坐标值。 处理坐标值: 编写SQL语句来处理提取出的坐标文本。这里我们假设坐标值是以(和)分隔的,并且每对括号内...
), ',') || ',ST_AsText (geom) AS geom FROM $tablename As o WHERE o.deletedat IS NULL' As sqlstr 1. 2. 3. 4. 5. 处理时间 查询结果去除null值 SELECT coalesce(wendushis,'') as wendushis,coalesce(yalishis,'') as yalishis,coalesce(yeweiss,'') as yeweiss,coalesce(liuliang,''...
SELECT st_srid(geom) FROM buct_monitoring_stations 1. 更改参考系 st_geomfromtext(ST_AsText(geom),4326)
SELECT st_astext(shape)aswkt FROM 表名 awherea.id=''; wkt数据 POLYGON((106.076314 32.753701,106.071810 32.757590,106.071679 32.758162,106.071541 32.758767,106.076314 32.753701)) 1 ST_GeomFromText('POLYGON((106.076314 32.753701,106.071810 32.757590,106.071679 32.758162,106.071541 32.758767,106.076314 32.753701...
在新创建的LocationRepository类中,定义地理空间查询方法。例如,你可以使用selectRaw()和st_astext()函数来执行地理空间查询: <?phpnamespaceApp\Repositories;useApp\Models\Location;useIlluminate\Database\Eloquent\Repository;useDoctrine\ORM\Query\ResultSetMapping;classLocationRepositoryextendsRepository{publicfunctionfin...
1)多线合并成一条线。。??( 2)多线分段成多条线。。。? 记得之前arctool里面有一个工具Split Line At Vertices。。。 接下来,是创建网络:( 1)先创建source和target属性。( 2)使用pgr_createTopology(pgrouting_xxxx) SELECT ST_AsText(geom) FROM ST_GeomFromEWKT()...
CREATETABLEemployee(empnamevarchar);CREATEORREPLACEPROCEDUREshow_found()AS$$DECLAREmyrec record;BEGINSELECTINTOmyrec*FROMemployeeWHEREempname='John'; IFNOTFOUNDTHENRAISE EXCEPTION'employee John not found';ENDIF;END; $$LANGUAGEplpgsql; Innerhalb eines Ausnahmehandlers enthält die spezielle Variable SQLST...
CREATEORREPLACEFUNCTIONwrk_fromAtoB(INedges_subsetregclass,INx1NUMERIC,INy1numeric,INx2NUMERIC,INy2NUMERIC,OUTseqINTEGER,OUTgidBIGINT,OUTnameTEXT,OUTcostsFLOAT,OUTazimuthFLOAT,OUTgeomGEOMETRY)RETURNSSETOFrecordAS$BODY$DECLAREfinal_queryTEXT;BEGINfinal_query:=FORMAT($$WITHverticesAS(SELECT*FROMshenzhen_...
ST_ImportObj 将基于对象存储或内存格式的Obj文件导入到数据库中。语法 boolean ST_ImportObj(text table_name,text url,text id,text options default '{}');boolean ST_ImportObj(text table_name,bytea content,text id,text options default '{}');... ST_ImportObj 将基于对象存储或内存格式的Obj...
SQL:pgsql报错Operation on mixed SRID geometries 原因:geom字段参考系出问题。 通过SELECT st_srid(geom)查询参考系发现有的参考系是0 统一将参考系改为4610即可 st_geomfromtext(ST_AsText(geom),4610)