ArcMap

Raster Compare

Summary

Compares the properties of two raster or mosaic datasets.

Usage

  • The tool returns messages showing the comparison result.

  • The parameter and attribute tolerances allow your comparisons to have a specified amount of deviation.

Syntax

arcpy.management.RasterCompare(in_base_raster, in_test_raster, {compare_type}, {ignore_option}, {continue_compare}, {out_compare_file}, {parameter_tolerances}, {attribute_tolerances}, {omit_field})
ParameterExplanationData Type
in_base_raster

The first raster or mosaic dataset to compare.

Raster Layer; Mosaic Layer
in_test_raster

The second raster or mosaic dataset to compare with the first.

Raster Layer; Mosaic Layer
compare_type
(Optional)

Specifies the type of rasters that will be compared.

  • RASTER_DATASET —Two raster datasets will be compared.
  • GDB_RASTER_DATASET —Two raster datasets in a geodatabase will be compared.
  • GDB_RASTER_CATALOG —Two raster catalogs in a geodatabase will be compared.
  • MOSAIC_DATASET —Two mosaic datasets will be compared.
String
ignore_option
[ignore_option,...]
(Optional)

Specifies the properties that will be ignored in the comparison.

  • BandCount —The number of bands will be ignored.
  • Extent —The extent will be ignored.
  • Columns And Rows —The number of columns and rows will be ignored.
  • Pixel Type —The pixel type will be ignored.
  • NoData —The NoData value will be ignored.
  • Spatial Reference —The spatial reference system will be ignored.
  • Pixel Value —The pixel values will be ignored.
  • Colormap —Existing color mas will be ignored.
  • Raster Attribute Table —Existing attribute tables will be ignored.
  • Statistics —Statistics will be ignored.
  • Metadata —Metadata will be ignored.
  • Pyramids Exist —Existing pyramids will be ignored.
  • Compression Type —The compression type will be ignored.
String
continue_compare
(Optional)

Specifies whether the comparison will stop if a mismatch is encountered.

  • NO_CONTINUE_COMPARE —The comparison will stop if a mismatch is encountered. This is the default.
  • CONTINUE_COMPARE —The comparison will continue if a mismatch is encountered.
Boolean
out_compare_file
(Optional)

A text file containing the comparison results.

File
parameter_tolerances
[[Parameter, Tolerance, Type],...]
(Optional)

The tolerances that determine the range in which values are considered equal. The same tolerance can be applied to all parameters, or different tolerances can be applied to individual parameters.

The tolerance type can be set as either a value or a fraction. For example, if the base value is 100 and a fraction tolerance is set to 0.00001, the compare tolerance will be within 100 * 0.001 (100 * 0.00001).

Value Table
attribute_tolerances
[[Field, Tolerance],...]
(Optional)

The fields that will be compared to determine if they are within a tolerance. The tolerance value is a value in the units of the attribute.

Value Table
omit_field
[omit_field,...]
(Optional)

The field or fields that will be omitted during comparison.

String

Derived Output

NameExplanationData Type
compare_status

The compare status will be true if no differences are found; it will be false if differences are found.

Boolean

Code sample

RasterCompare example 1 (Python window)

This is a Python sample for the RasterCompare function.

import arcpy
RasterCompare_management("C:/workspace/image1.tif","C:/workspace/image2.tif",\
                         "RASTER_DATASET","'Pyramids Exist'",\
                         "CONTINUE_COMPARE","C:/workspace/compare01.txt",\
                         "Pixel_Value 1 Value","Count 5","OID")
RasterCompare example 2 (stand-alone script)

This is a Python sample for the RasterCompare function.

##====================================
##Raster Compare
##Usage: RasterCompare_management in_base_raster in_test_raster {RASTER_DATASET |
##                                GDB_RASTER_DATASET | GDB_RASTER_CATALOG |
##                                MOSAIC_DATASET} {ignore_option;ignore_option...}
##                                {NO_CONTINUE_COMPARE | CONTINUE_COMPARE} 
##                                {out_compare_file} {Parameter {Tolerance} {Type};
##                                Parameter {Tolerance} {Type}...} {Field {Tolerance};
##                                Field {Tolerance}...} {omit_field;omit_field...} 
    
    
try:
    import arcpy
    
    arcpy.env.workspace = "c:/workspace"
    
    ##Compare two Raster dataset
    arcpy.RasterCompare_management("raster_base.tif","raster_test.tif","RASTER_DATASET",\
                                   "","CONTINUE_COMPARE","compareresult.txt","","","")
    
    ##Compare two Raster Catalog with ignore options
    arcpy.RasterCompare_management("fgdb.gdb/rc_base","fgdb.gdb/rc_test","RASTER_CATALOG",\
                                   "IsManaged;Extent","CONTINUE_COMPARE","compareresult2.txt",\
                                   "","","DATE")
    
    ##Compare two Mosaic Dataset with torelance
    arcpy.RasterCompare_management("fgdb.gdb/md_base","fgdb.gdb/md_test","MOSAIC_DATASET",\
                                   "IsEmbedded;Seamline","CONTINUE_COMPARE","compareresult3.txt",\
                                   "All 0.00001 Fraction","HighPS 0.0001;LowPS 0.0001",\
                                   "ItemTS;UriHash")
    
except:
    print "Raster Compare exsample failed."
    print arcpy.GetMessages()

Environments

Licensing information

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

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