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

Function: st_valuecount

Schema

public

Owner

postgres

Descriptions

args: rast, nband, searchvalue, roundto=0 - Returns a set of records containing a pixel band value and count of the number of pixels in a given band of a raster (or a raster coverage) that have a given set of values. If no band is specified defaults to band 1. By default nodata value pixels are not counted. and all other values in the pixel are output and pixel band values are rounded to the nearest integer.

Options

Definition

CREATE OR REPLACE FUNCTION public.st_valuecount (
 rast public.raster,
 nband integer,
 searchvalue double precision,
 roundto double precision = 0
)
RETURNS integer AS
$span$
SELECT ( public._ST_valuecount($1, $2, TRUE, ARRAY[$3]::double precision[], $4)).count
$span$
LANGUAGE 'sql'
IMMUTABLE
RETURNS NULL ON NULL INPUT
SECURITY INVOKER
COST 100;

COMMENT ON FUNCTION public.st_valuecount(rast public.raster, nband integer, searchvalue double precision, roundto double precision)
IS 'args: rast, nband, searchvalue, roundto=0 - Returns a set of records containing a pixel band value and count of the number of pixels in a given band of a raster (or a raster coverage) that have a given set of values. If no band is specified defaults to band 1. By default nodata value pixels are not counted. and all other values in the pixel are output and pixel band values are rounded to the nearest integer.';

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