EqualToFrequency

摘要

创建栅格对象,其中每个像素包含栅格集中的值等于另一个栅格的次数。

说明

有关此函数工作原理的详细信息,请参阅等于频数工具。

栅格对象所引用的栅格数据集是临时性的。 要将其设置为永久,可以调用栅格对象的 save 方法。

语法

EqualToFrequency (value_raster, rasters, {extent_type}, {cellsize_type}, {process_as_multiband})
参数说明数据类型
value_raster

A value raster that will be referenced by the set of input rasters.

Raster
rasters
[rasters,...]

The list of input rasters.

Raster
extent_type

The method that will be used to compute the extent of the output when the input rasters have different extents.

  • FirstOfThe output extent will be defined using the extent of the first input raster.
  • LastOfThe output extent will be defined using the extent of the last input raster.
  • IntersectionOfThe output extent will be defined as the intersecting area of the input rasters.
  • UnionOfThe output extent will be defined as the total extent of the input rasters.

(默认值为 FirstOf)

String
cellsize_type

The method that will be used to compute the pixel size of the output when the input rasters have different pixel sizes.

  • FirstOfThe output pixel size will be defined using the pixel size of the first input raster.
  • LastOfThe output pixel size will be defined using the pixel size of the last input raster.
  • MaxOfThe output pixel size will be defined using the maximum pixel size of the input rasters.
  • MeanOfThe output pixel size will be defined using the mean of both input rasters.
  • MinOfThe output pixel size will be defined using the minimum pixel size of the input rasters.

(默认值为 FirstOf)

String
process_as_multiband

Specifies how the bands of the input rasters will be processed.

  • True—Each multiband raster will be processed as a multiband raster. The operation will be performed for each band from one input using the corresponding band number from other inputs.
  • False—Each band from a multiband raster input will be processed separately as a single-band raster.

(默认值为 False)

Boolean
返回值
数据类型说明
Raster

输出栅格。

代码示例

EqualToFrequency 示例

计算输入栅格中的值等于值栅格的次数。

# Import system modules
import arcpy
from arcpy.ia import *

#Set the local variables
value_raster = r"c:\temp\value_raster.tif"

rasters = [r"c:\temp\raster1.tif", r"c:\temp\raster2.tif", r"c:\temp\raster3.tif"] 

#Execute
EqualTo_raster = EqualToFrequency(value_raster, rasters, "UnionOf", "FirstOf", True)