ATan (Spatial Analyst)

License Level:BasicStandardAdvanced

Summary

Calculates the inverse tangent of cells in a raster.

Illustration

ATan illustration
OutRas = ATan(InRas)

Usage

Syntax

ATan (in_raster_or_constant)
ParameterExplanationData Type
in_raster_or_constant

The input for which to calculate the inverse tangent values.

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 values are the inverse tangent of the input values.

Raster

Code Sample

ATan example 1 (Python window)

This example calculates the inverse tangent of the values in the input GRID raster.

import arcpy
from arcpy import env
from arcpy.sa import *
env.workspace = "C:/sapyexamples/data"
outATan = ATan("degs")
outATan.save("C:/sapyexamples/output/outatan")
ATan example 2 (stand-alone script)

This example calculates the inverse tangent of the values in the input GRID raster and outputs a TIFF raster.

# Name: ATan_Ex_02.py
# Description: Calculates the inverse tangent of cells in a raster
# 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 = "degs"

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

# Execute ATan
outATan = ATan(inRaster)

# Save the output 
outATan.save("C:/sapyexamples/output/outatan.tif")

Environments

Related Topics

Licensing Information

ArcGIS for Desktop Basic: Requires Spatial Analyst
ArcGIS for Desktop Standard: Requires Spatial Analyst
ArcGIS for Desktop Advanced: Requires Spatial Analyst
11/8/2012