Mysql Spatial 空间查询参考

--mysql5.7空间函数列表

https://dev.mysql.com/doc/refman/5.7/en/spatial-function-reference.html

--查询在面内的要素

SELECT
tt.OBJECTID,
tt.SHAPE
FROM
ws_pipe_1 tt
WHERE
st_contains (
ST_PolyFromText (
'POLYGON((30.284425 119.986703, 30.288573 120.049944, 30.254575 120.047788, 30.23258 119.841321, 30.284425 119.986703))',4490
),
tt.SHAPE
);

--查询表是什么坐标系

SELECT ST_SRID(tt.geom) from ws_pipe tt; 

　　

--设置mysql空间坐标系

--存在问题，经纬度会反过来
update ws_pipe set geom= st_geomfromtext(st_astext(geom),4490);
--正确
update yh_map_valve set geom=ST_GeomFromGeoJSON(st_asgeojson(geom),4490)