This topic describes the ST_LineToCurve function. This function converts a LineString or polygon object into a CircularString or Curved Polygon object.
Syntax
geometry ST_LineToCurve(geometry geomANoncircular);Parameters
| Parameter | Description |
| geomANoncircular | The geometry object that you want to specify. |
Description
- The points that are required to represent the equivalent curves are much fewer than the input LineString or polygon object.
- If the input LineString or polygon object is not curved enough to clearly represent a curve, the function returns the input geometry object.
Examples
Results returned by using the default parameter settings:
SELECT ST_AsText(ST_LineToCurve(ST_Buffer('POINT(0 0)', 1)));
st_astext
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CURVEPOLYGON(CIRCULARSTRING(1 0,-1 0,1 0))
(1 row)