Int (Image Analyst)

Summary

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

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

  For the same two values, Round Down returns the following:

  • 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.

• If the input is a multiband raster, the output will be a multiband raster. The tool will perform the operation on each band in the input.

• If the input is multidimensional raster data, all slices from all variables will be processed. The output will be a multidimensional raster in CRF format.

Parameters

Dialog

Label	Explanation	Data Type
Input raster or constant value	The input raster to be converted to integer. 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

Label	Explanation	Data Type
Output raster	The output raster. The cell values are the input values converted to integers by truncation.	Raster

Python

Int(in_raster_or_constant)

Name	Explanation	Data Type
in_raster_or_constant	The input raster to be converted to integer. 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

Name	Explanation	Data 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.ia import *
env.workspace = "C:/iapyexamples/data"
outInt = Int("gwhead")
outInt.save("C:/iapyexamples/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 pixel value of a raster to an integer by truncation
# Requirements: Image Analyst Extension

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

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

# Set local variables
inRaster = "gwhead"

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

# Execute Int
outInt = Int(inRaster)

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

Environments

Auto Commit, Cell Size, Cell Size Projection Method, Compression, Current Workspace, Extent, Geographic Transformations, Mask, Output CONFIG Keyword, Output Coordinate System, Scratch Workspace, Snap Raster, Tile Size