1、ST_AsGeoJSON 图元转geojson格式
select ST_AsGeoJSON(l.geom) from g_zd l limit 10
2、 ST_Transform 坐标转换
select st_transform(l.shape, 3857) from sde_wf_cyyq l limit 10
select st_astext(st_transform(l.shape, 3857)) from sde_wf_cyyq l limit 10
3、st_astext 图元二进制转文本
select st_srid(shape) from sde_wf_cyyq
4、st_srid 查询数据表坐标系
select st_srid(shape) from sde_wf_cyyq
如果为0的话那就没有坐标系
6、st_geometry 文本转二进制
INSERT INTO sde.pro_gc ( objectid, shape )
VALUES(11,st_geometry ( 'POLYGON((116.403322 39.920255,116.410703 39.897555,116.402292 39.892353,116.389846 39.891365,116.403322 39.920255))', 4326));
7、ST_Intersects 求相交
update g_fw a set block=q.grid_block from g_qy q where st_intersects(a.geom, q.geom)
8、表转geojson数据
SELECTrow_to_json ( fc ) AS geojson
FROM(SELECT'FeatureCollection' AS TYPE,array_to_json ( ARRAY_AGG ( f ) ) AS features FROM(SELECT'Feature' AS TYPE,ST_AsGeoJSON ( ( lg.geom ), 15, 0 ) :: json AS geometry,row_to_json ( lg ) AS properties FROMg_fj AS lg ) AS f ) AS fc;