PostGIS
Description
Returns the last point of a LINESTRING or CIRCULARLINESTRING
geometry as a POINT. Returns NULL if the input is not a
LINESTRING or CIRCULARLINESTRING.
This
method implements the SQL/MM specification.
SQL-MM 3: 7.1.4
This
function supports 3d and will not drop the z-index.
This
method supports Circular Strings and Curves.
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Examples
End point of a LineString
postgis=# SELECT ST_AsText(ST_EndPoint('LINESTRING(1 1, 2 2, 3 3)'::geometry));
st_astext
------------
POINT(3 3)End point of a non-LineString is NULL
SELECT ST_EndPoint('POINT(1 1)'::geometry) IS NULL AS is_null;
is_null
----------
tEnd point of a 3D LineString
--3d endpoint
SELECT ST_AsEWKT(ST_EndPoint('LINESTRING(1 1 2, 1 2 3, 0 0 5)'));
st_asewkt
--------------
POINT(0 0 5)End point of a CircularString
SELECT ST_AsText(ST_EndPoint('CIRCULARSTRING(5 2,-3 1.999999, -2 1, -4 2, 6 3)'::geometry));
st_astext
------------
POINT(6 3)