将一个网格对象转换为二进制结构。
语法
bytea ST_AsBinary(geomgrid grid)
bytea ST_AsBinary(h3grid grid)参数
参数名称 | 描述 |
grid | 需要输出的网格对象，数据类型为GeomGrid或者H3Grid。 |
示例
with g as (
select unnest(st_asgrid(
ST_geomfromtext('POINT(116.31522216796875 39.910277777777778)',4490), 15)) as grid)
select ST_asBinary(grid) from g;
st_asbinary
--------------------
\x0102000f74271236
select st_asbinary(unnest(st_as3dgrid(
'srid=4490;POINT(116.31522216796875 39.910277777777778 1001.8)'::geometry, 20)));
st_asbinary
--------------------------------
\x0102401474271236362412000000
-- H3Grid
select st_asbinary(st_h3fromlatlng(20.5,128.2,8));
st_asbinary
--------------------------
\x010100ffff9f6826a18408