Summary
Categorizes the pixel values of a raster object into groups with specific values.
For example, assign image values from 1 to 25 a value of 1, and image values from 200 to 255 a value of 255.
Discussion
For more information about how this function works, see the Remap raster function.
The referenced raster dataset for the raster object is temporary. To make it permanent, you can call the raster object's save method.
Syntax
Remap (raster, {input_ranges}, {output_values}, {no_data_ranges}, {allow_unmatched}, {replacement_value})
Parameter | Explanation | Data Type |
raster | The input raster. | Raster |
input_ranges | Input ranges are specified in pairs: from (inclusive) and to (exclusive). (The default value is None) | Double |
output_values |
The output values of the corresponding input_ranges parameter value. (The default value is None) | Double |
no_data_ranges |
NoData ranges are specified in pairs: from (inclusive) and to (exclusive). (The default value is None) | Double |
allow_unmatched |
Missing values in the reclass table can retain their value or be remapped to NoData or to a replacement value.
(The default value is True) | Boolean |
replacement_value | The value that will replace missing or unmatched values in the output when the allow_unmatched parameter is set to False. (The default value is None) | Double |
Data Type | Explanation |
Raster | The output raster. |
Code sample
This example reclassifies the input raster.
from arcpy.sa import *
out_remap_raster = Remap("NomalRaster.tif")
out_remap_raster.save("C:/arcpyExamples/raster_remap.tif")
This example reclassifies the input raster.
# Import system modules
import arcpy
from arcpy.sa import *
# Set the analysis environments
arcpy.env.workspace = "C:/arcpyExamples/data"
# Set Local Variables
in_raster = "raster.tif"
# Excute Remap function
out_remap_raster = Remap(in_raster, [-5, 0, 0, 5], [-1, 1])
# Save output
out_remap_raster.save("C:/arcpyExamples/outputs/raster_remap.tif")