Rotate (Data Management)

Usage tips

Command line and Scripting

• Use rotate when the raster dataset is in the wrong orientation. The default pivot point is in the lower left corner of the raster dataset; however, a different location can be specified.

• You can save your output to GRID, IMG, TIFF, personal geodatabase, file geodatabase, or ArcSDE geodatabase.

• When storing a raster dataset in a geodatabase, no file extension should be added to the name of the raster dataset. When storing the raster dataset in a file format, you need to specify the file extension: .img for an ERDAS IMAGINE file, .tif for TIFF, or no extension for GRID.

• When storing your raster dataset to a geodatabase, you can specify a compression type and compression quality within the Raster Storage Settings in the Environment Settings dialog box.

• Rotation is, by default, around the lower left corner of the raster. The rotation point can be changed with the optional Pivot Point parameter.

• Resampling is only done if the angle is not a multiple of 90.

• The rotation angle specified must be between 0 and 360, the dataset will be rotated in a clock-wise rotation.

• When you are using the tool's command in the command line window, you may need to press F8 when entering a variable with which you need help. You may want to do this when entering a pivot point.

• The following environments affect this tool: current workspace, scratch workspace, output coordinate system, output extent, output CONFIG keyword, pyramid, raster statistics, compression, and tile size.

Map Algebra

• The rotation is around the lower left corner of the raster.

• The resampling is only applied if the angle is not a multiple of 90.

• The normal range of values for angle is 0 to 360. If values outside this range are entered, they will be normalized to it. For example, if the specified angle is 370° , the result would be equivalent to specifying the angle as 10° (370° - 360° = 10° ).

• Learn more about how to specify the input raster dataset in the Map Algebra expression of Raster Calculator.

Command line syntax
An overview of the Command Line window
Rotate_management <in_raster> <out_raster> <angle> {pivot_point} {NEAREST | BILINEAR | CUBIC}

Command line example

rotate_management d:\images\MyImages.mdb\flowers d:\images\NewImages.mdb\flowers 45 pivot_point1 CUBIC

Scripting syntax
About getting started with writing geoprocessing scripts
Rotate_management (in_raster, out_raster, angle, pivot_point, resampling_type)

Script example

# RasterTransformation_rotate.py
# Description: Rotates a raster around the specified pivot point by
#              an angle specified in degrees.
# Requirements: None
# Author: ESRI
# Date: 12/22/03

# Create the Geoprocessor object
import arcgisscripting
gp = arcgisscripting.create()

try:
    # Set the input raster dataset name
    inputRaster = "C:/data/ingrid"

    # Set the output raster name
    outputRaster = "C:/data/outgrid"

    # Specify the pivot point
    PivotPoint = "100 100"

    # Process: Rotate, specify the pivot point or use default
    #  gp.Rotate_management(inputRaster, outputRaster, "45")
    gp.Rotate_management(inputRaster, outputRaster, "45" ,PivotPoint, "BILINEAR")

except:
    # If an error occurred while running a tool, then print the messages
    print gp.GetMessages()

Map Algebra syntax
Rotate(<in_grid>, <angle>, {NEAREST | BILINEAR | CUBIC})

Map Algebra example

rotate(ingrid)
rotate(ingrid, 45)
rotate(ingrid, 101.25, cubic)

ArcObjects syntax
There is no corresponding ArcGIS Spatial Analyst object to perform Rotate. However, in core ArcGIS, similar functionality can be found in the IRasterGeometryProc object.
For more information, see ArcObjects Developer Help.