RemapValue (arcpy.sa)
摘要
该列表用于将各输入值重分类为各输出栅格所对应的值。
插图
讨论
RemapValue 对象可用于重分类工具和 WOTable 类中。
通过输入 NoData(字符串)作为新值,可为 NoData 赋予旧值。
各输入值为分类值(如土地利用)或者仅需更改少量值时,通常使用按单个值进行重分类。
语法
RemapValue (remapTable)
参数 | 说明 | 数据类型 |
remapTable [[oldValue, newValue],...] |
The remap table to be used to remap the old values to new values. It defines a list to be used to remap the input values. It is a list of lists, with the inner lists being composed of two components. The components are:
The oldValue can be numeric or string. The newValue must be integer. | List |
属性
属性 | 说明 | 数据类型 |
remapTable (读写) |
The remap table that is used to remap the original values to new values. | List |
代码实例
RemapValue 示例 1(Python 窗口)
演示如何创建 RemapValue 类并在 Python 窗口中的 Reclassify 工具中使用 RemapValue 类。
import arcpy
from arcpy import env
from arcpy.sa import *
env.workspace = "C:/sapyexamples/data"
myRemapValue = RemapValue([["Water", 0], ["Wetlands", 0], ["Barrenland", 1], ["Brushtransitional", 2], ["Builtup",3]])
outReclassRV = Reclassify("landuse", "LANDUSE2", myRemapValue)
outReclassRV.save("C:/sapyexamples/output/reclassrv")
RemapValue 示例 2(独立脚本)
使用 RemapValue 类进行重分类。
# Name: RemapValue_Ex_02.py
# Description: Uses the RemapValue object to execute Reclassify tool.
# Requirements: Spatial Analyst Extension
# Import system modules
import arcpy
from arcpy import env
from arcpy.sa import *
# Set environment settings
env.workspace = "C:/sapyexamples/data"
# Set local variables
inRaster = "negs"
# Define the RemapValue Object
myRemapVal = RemapValue([[-3,9],[0,1],[3,-4],[4,5],[5,6],[6,4],[7,-7]])
# Check out the ArcGIS Spatial Analyst extension license
arcpy.CheckOutExtension("Spatial")
# Execute Reclassify
outReclassRV = Reclassify(inRaster, "VALUE", myRemapVal, "")
# Save the output
outReclassRV.save("C:/sapyexamples/output/reclassrevar2")
相关主题
5/10/2014