Round Down (Spatial Analyst)

Summary

Returns the next lower whole number for each cell in a raster.

Illustration

Round Down illustration
OutRas = RoundDown(InRas1)

Usage

Syntax

RoundDown (in_raster_or_constant)
ParameterExplanationData Type
in_raster_or_constant

The input values to be rounded down.

In order to use a number as an input for this parameter, the cell size and extent must first be set in the environment.

Raster Layer | Constant

Return Value

NameExplanationData Type
out_raster

The output raster.

The cell values are the input values converted to integers by rounding down to the next lower whole number.

Raster

Code Sample

RoundDown example 1 (Python window)

This example rounds the values in the input raster to the next lower whole number.

import arcpy
from arcpy import env
from arcpy.sa import *
env.workspace = "C:/sapyexamples/data"
outRoundDown = RoundDown("gwhead")
outRoundDown.save("C:/sapyexamples/output/outrd")
RoundDown example 2 (stand-alone script)

This example rounds the values in the input raster to the next lower whole number.

# Name: RoundDown_Ex_02.py
# Description: Returns the next lower whole number for each cell in a raster
# Requirements: Spatial Analyst Extension
# Author: ESRI

# Import system modules
import arcpy
from arcpy import env
from arcpy.sa import *

# Set environment settings
env.workspace = "C:/sapyexamples/data"

# Set local variables
inRaster = "gwhead"

# Check out the ArcGIS Spatial Analyst extension license
arcpy.CheckOutExtension("Spatial")

# Execute RoundDown
outRoundDRaster = RoundDown(inRaster)

# Save the output 
outRoundDRaster.save("C:/sapyexamples/output/outrounddown")

Environments

Related Topics

Licensing Information

ArcView: Requires Spatial Analyst
ArcEditor: Requires Spatial Analyst
ArcInfo: Requires Spatial Analyst

6/29/2011