This topic describes the ST_Parent function. This function returns the parent grid of an H3-encoded geographic grid at the specified level.
Syntax
h3grid ST_Parent(h3grid code, integer level);Parameters
Parameter | Description |
code | The H3-encoded geographic grid object. |
level | The level. The default value is the level above the level of the H3 encoded grid object. |
Example
-- The upper layer by default.
select st_astext(st_parent(st_h3fromtext('884a126689fffff')));
st_astext
-----------------
874a12668ffffff
-- The second layer.
select st_astext(st_parent(st_h3fromtext('884a126689fffff'),2));
st_astext
-----------------
824a17fffffffff