综上所述,使用ST_AsText函数是将PostgreSQL中的geometry数据类型转换为字符串的有效方法。这种方法简单且直接,适用于大多数地理空间数据处理场景。
SELECT st_srid(geom) FROM buct_monitoring_stations 1. 更改参考系 st_geomfromtext(ST_AsText(geom),4326)
), ',') || ',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,''...
1 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 32.75...
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()...
CREATEORREPLACEPROCEDUREsqlstate_sqlerrm()AS$$BEGINUPDATE employeeSETfirstname='Adam'WHERElastname='Smith';EXECUTE'select invalid'; EXCEPTIONWHENOTHERSTHENRAISE INFO'error message SQLERRM %', SQLERRM; RAISE INFO'error message SQLSTATE %',SQLSTATE;END; $$LANGUAGEplpgsql; ...
selectid,name,ST_AsText(geom),ST_DistanceSphere(ST_GeomFromText('POINT(113.667096 34.753029)',4326),geom)frommytable order by geom<->ST_GeomFromText('POINT(113.667096 34.753029)',4326)limit3; 查看此对象1000 米内的所有对象与距离 SELECTid,name,lon,lat,ST_DistanceSphere(ST_GeomFromText('POINT...
(SELECTsourceFROM%1$IUNIONSELECTtargetFROM%1$I)),dijkstraAS(SELECT*FROMwrk_dijkstra('%1$I',-- source(SELECTidFROMverticesORDERBYthe_geom<->ST_SetSRID(ST_Point(%2$s,%3$s),3857)LIMIT1),-- target(SELECTidFROMverticesORDERBYthe_geom<->ST_SetSRID(ST_Point(%4$s,%5$s),3857)LIMIT1))...
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)