This topic describes the ST_NumPoints function. If the input geometry object is a LineString or CircularString object, this function returns the number of points of the input geometry object.

Syntax

integer  ST_NumPoints(geometry  g1);

Parameters

Parameter Description
g1 The geometry object that you want to specify.

Description

  • This function is the alias of the ST_NPoints function.
  • We recommend that you use the ST_NPoints function, which can be used in multiple scenarios and can work with many types of geometry objects.

Examples

SELECT ST_NumPoints('LineString(0 0,0 1,1 1)'::geometry);
 st_numpoints
--------------
            3
(1 row)