Remap

サマリー

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.

説明

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.

構文

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

パラメーター	説明	データ タイプ
raster	The input raster.	Raster
input_ranges	Input ranges are specified in pairs: from (inclusive) and to (exclusive). (デフォルト値は次のとおりです None)	Double
output_values	The output values of the corresponding input_ranges parameter value. (デフォルト値は次のとおりです None)	Double
no_data_ranges	NoData ranges are specified in pairs: from (inclusive) and to (exclusive). (デフォルト値は次のとおりです None)	Double
allow_unmatched	Missing values in the reclass table can retain their value or be remapped to NoData or to a replacement value. True—Any pixel from the input raster that is not reclassed in a remap table will retain its value and be written for its location to the output raster. False—Any pixel from the input raster that is not reclassed in a remap table will have its value remapped to NoData or to a replacement value for its location to the output raster. (デフォルト値は次のとおりです 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. (デフォルト値は次のとおりです None)	Double

戻り値

データ タイプ	説明
Raster	The output raster.

コードのサンプル

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")