ArcMap

Int

Available with Spatial Analyst license.

Available with 3D Analyst license.

Summary

Converts each cell value of a raster to an integer by truncation.

Illustration

Int illustration
OutRas = Int (InRas1)

Usage

  • The input values can be either positive or negative.

  • If rounding is preferred to truncating, add a 0.5 input raster prior to performing the operation.

  • There is a difference between the Int tool and the Round Down tool. For example, given the following two values, Int always truncates the number:

    • 1.5 becomes 1
    • -1.5 becomes -1

    while for the same two values, Round Down returns:

    • 1.5 becomes 1.0
    • -1.5 becomes -2.0

    Another difference is that Round Down outputs floating-point values, while Int only outputs integer values.

  • The maximum supported range of integer raster values is -2,147,483,648 (minimum size determined by -231) to 2,147,483,647 (maximum size determined by 231 – 1). If Int is used on a floating-point raster which has cells with values outside this range, those cells will be NoData in the output raster.

  • Storing categorical (discrete) data as an integer raster will use significantly less disk space than the same information stored as a floating-point raster. Whenever possible, it is recommended to convert floating-point rasters to integer with this tool.

  • See Analysis environments and Spatial Analyst for additional details on the geoprocessing environments that apply to this tool.

Syntax

Int (in_raster_or_constant)
ParameterExplanationData Type
in_raster_or_constant

The input raster to be converted to integer.

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 truncation.

Raster

Code sample

Int example 1 (Python window)

This example converts the input values to integer by truncation.

import arcpy
from arcpy import env
from arcpy.sa import *
env.workspace = "C:/sapyexamples/data"
outInt = Int("gwhead")
outInt.save("C:/sapyexamples/output/outint2")
Int example 2 (stand-alone script)

This example converts the input values to integer by truncation.

# Name: Int_Ex_02.py
# Description: Converts each cell value of a raster to an integer by truncation
# Requirements: Spatial Analyst Extension

# 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 Int
outInt = Int(inRaster)

# Save the output 
outInt.save("C:/sapyexamples/output/outint")

Environments

Licensing information

  • ArcGIS Desktop Basic: Requires Spatial Analyst
  • ArcGIS Desktop Standard: Requires Spatial Analyst
  • ArcGIS Desktop Advanced: Requires Spatial Analyst

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