Create Ortho Corrected Raster Dataset (Data Management)


Creates an orthocorrected raster dataset by incorporating elevation data and the rational polynomial coefficients (RPC) associated with satellite data to accurately line up imagery.


  • To orthocorrect a raster dataset, the raster must have RPCs associated with it.

  • For a more accurate result, use the digital elevation model (DEM) option for elevation. Use a DEM in the orthocorrection process to correct geometric errors caused by relief displacement.

  • Using a constant elevation value for the Orthorectification Type parameter will not yield accurate results and should only be used when no DEM is available and approximate spatial accuracy is acceptable.

  • You can save your output to BIL, BIP, BMP, BSQ, DAT, Esri Grid , GIF, IMG, JPEG, JPEG 2000, PNG, TIFF, MRF, CRF, or any geodatabase raster dataset.

  • Satellite RPCs require a DEM referenced to ellipsoidal heights, but most elevation data (such as USGS NED and ArcGIS Online World Elevation) are referenced to sea level orthometric heights. Check the Geoid parameter (GEOID in Python) to orthorectify with RPCs unless your DEM is referenced to an ellipsoidal height.


CreateOrthoCorrectedRasterDataset(in_raster, out_raster_dataset, Ortho_type, constant_elevation, {in_DEM_raster}, {ZFactor}, {ZOffset}, {Geoid})
ParameterExplanationData Type

The raster dataset to orthorectify. The raster must have RPCs in its metadata.

Raster Layer

The name, location, and format of the dataset to be created.

When storing the raster dataset in a file format, you need to specify the file extension:

  • .bilEsri BIL
  • .bipEsri BIP
  • .bmp—BMP
  • .bsqEsri BSQ
  • .dat—ENVI DAT
  • .gif—GIF
  • .jpg—JPEG
  • .jp2—JPEG 2000
  • .png—PNG
  • .tif—TIFF
  • .mrf—MRF
  • .crf—CRF
  • No extension for Esri Grid

When storing a raster dataset in a geodatabase, do not add a file extension to the name of the raster dataset.

When storing your raster dataset to a JPEG file, a JPEG 2000 file, or a geodatabase, you can specify a Compression Type and Compression Quality in the Environments.

Raster Dataset

The DEM or specified value that represents the average elevation across the image.

  • CONSTANT_ELEVATIONA specified elevation value will be used.
  • DEMA specified digital elevation model raster will be used.

The constant elevation value to be used when the Ortho_type parameter is CONSTANT_ELEVATION.

If a DEM is used in the orthocorrection process, this value is not used.


The DEM raster to be used for orthorectification when the Ortho_type parameter is DEM.

Mosaic Layer; Raster Layer

The scaling factor used to convert the elevation values in the DEM.

If your vertical units are meters, set the ZFactor to 1. If your vertical units are feet, set the Factor to 0.3048. If any other vertical units are used, use the ZFactor to scale the units to meters.


The base value to be added to the elevation value in the DEM. This can be used to offset elevation values that do not start at sea level.


Specifies whether the geoid correction required by RPCs that reference ellipsoidal heights will be made. Most elevation datasets are referenced to sea level orthometric heights, so this correction is required in these cases to convert to ellipsoidal heights.

  • NONENo geoid correction is made. Use NONE only if your DEM is already expressed in ellipsoidal heights.
  • GEOIDA geoid correction will be made to convert orthometric heights to ellipsoidal heights (based on EGM96 geoid).

Code sample

CreateOrthoCorrectedRasterDataset example 1 (Python window)

This is a Python sample for the CreateOrthoCorrectedRasterDataset tool.

import arcpy
                                                   "DEM", "#", "c:/data/DEM.img",
                                                   "#", "10", "GEOID")
CreateOrthoCorrectedRasterDataset example 2 (stand-alone script)

This is a Python script sample for the CreateOrthoCorrectedRasterDataset tool.

##Create Ortho Corrected Raster Dataset
##Usage: CreateOrthoCorrectedRasterDataset_management in_raster out_raster_dataset
##                                                    CONSTANT_ELEVATION | DEM constant_ elevation
##                                                    in_DEM_raster {ZFactor} {ZOffset} {NONE | GEOID}

import arcpy
arcpy.env.workspace = "C:/Workspace"

##Ortho correct with Constant elevation
arcpy.CreateOrthoCorrectedRasterDataset_management("ortho.img", "orthoready.tif",\
                                                   "CONSTANT_ELEVATION", "30", "#",\
                                                   "#", "#", "#")

##Ortho correct with DEM image and Z factors
arcpy.CreateOrthoCorrectedRasterDataset_management("ortho.img", "orthoready_dem.tif",\
                                                   "DEM", "#", "dem.img", "#", "10", "GEOID")

Licensing information

  • Basic: Yes
  • Standard: Yes
  • Advanced: Yes

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