Skip to main content

Popularity

汇总

创建栅格对象，其中每个像素包含参数列表中特定频数取值级别下的值。

讨论

有关此函数工作原理的详细信息，请参阅 频数取值 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

Popularity(popularity_raster, rasters, {extent_type}, {cellsize_type}, {process_as_multiband})

参数 说明 数据类型

popularity_raster

The input raster that defines the popularity position to be returned.

Raster

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.

  • FirstOf—The output extent will be defined using the extent of the first input raster.

  • LastOf—The output extent will be defined using the extent of the last input raster.

  • IntersectionOf—The output extent will be defined as the intersecting area of the input rasters.

  • UnionOf—The 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.

  • FirstOf—The output pixel size will be defined using the pixel size of the first input raster.

  • LastOf—The output pixel size will be defined using the pixel size of the last input raster.

  • MaxOf—The output pixel size will be defined using the maximum pixel size of the input rasters.

  • MeanOf—The output pixel size will be defined using the mean of both input rasters.

  • MinOf—The 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

Popularity 示例

计算输入栅格集中达到指定频数取值等级的值。

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

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

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

# Run
output_raster = Popularity(popularity_raster, rasters, "UnionOf", "FirstOf", True)