pggeodb.nancy.inra.fr/db_cefs - db_cefs on pggeodb.nancy.inra.fr

Function: st_longestline

Schema

public

Owner

postgres

Descriptions

args: g1, g2 - Returns the 2-dimensional longest line points of two geometries. The function will only return the first longest line if more than one, that the function finds. The line returned will always start in g1 and end in g2. The length of the line this function returns will always be the same as st_maxdistance returns for g1 and g2.

Options

Definition

CREATE OR REPLACE FUNCTION public.st_longestline (
 geom1 public.geometry,
 geom2 public.geometry
)
RETURNS public.geometry AS
$span$
SELECT _ST_LongestLine(ST_ConvexHull($1), ST_ConvexHull($2))
$span$
LANGUAGE 'sql'
IMMUTABLE
RETURNS NULL ON NULL INPUT
SECURITY INVOKER
COST 100;

COMMENT ON FUNCTION public.st_longestline(geom1 public.geometry, geom2 public.geometry)
IS 'args: g1, g2 - Returns the 2-dimensional longest line points of two geometries. The function will only return the first longest line if more than one, that the function finds. The line returned will always start in g1 and end in g2. The length of the line this function returns will always be the same as st_maxdistance returns for g1 and g2.';

This file was generated with SQL Manager for PostgreSQL (www.pgsqlmanager.com) at 13/03/2014 13:23