Remap

Résumé

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.

Syntaxe

Remap (raster, {input_ranges}, {output_values}, {no_data_ranges}, {allow_unmatched})

Paramètre	Explication	Type de données
raster	The input raster.	Raster
input_ranges	Input ranges are specified in pairs: from (inclusive) and to (exclusive). (La valeur par défaut est None)	Double
output_values	Output values of corresponding input_ranges. (La valeur par défaut est None)	Double
no_data_ranges	NoData ranges are specified in pairs: from (inclusive) and to (exclusive). (La valeur par défaut est None)	Double
allow_unmatched	Missing values in the reclass table can retain their value or be remapped to NoData. False—Any pixel from the input raster that does not get reclassed in a remap table will retain its value and be written for its location to the output raster. True—Any pixel from the input raster that does not get reclassed in a remap table will have its value remapped to NoData for its location to the output raster. (La valeur par défaut est False)	Boolean

Valeur renvoyée

Type de données	Explication
Raster	The output raster.

Exemple de code

Remap example 1

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")

Remap example 2

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")