Range

摘要

创建栅格对象,其中每个像素包含多个栅格中最大值和最小值之间的差值。

说明

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

Range (rasters, {extent_type}, {cellsize_type}, {ignore_nodata}, {process_as_multiband})
参数说明数据类型
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 is defined using the extent of the first input raster.
  • LastOfThe output extent is defined using the extent of the last input raster.
  • IntersectionOfThe output extent is defined as the intersecting area of the input rasters.
  • UnionOfThe output extent is 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 is defined using the pixel size of the first input raster.
  • LastOfThe output pixel size is defined using the pixel size of the last input raster.
  • MaxOfThe output pixel size is defined using the maximum pixel size of the input rasters.
  • MeanOfThe output pixel size is defined using the mean of both input rasters.
  • MinOfThe output pixel size is defined using the minimum pixel size of the input rasters.

(默认值为 FirstOf)

String
ignore_nodata

Specifies whether to ignore NoData values in the calculation.

  • True—The analysis will include all valid pixels in the input rasters and ignore any NoData pixels.
  • False—The analysis will result in NoData if there are any NoData values for the pixels in the input rasters.

(默认值为 False)

Boolean
process_as_multiband

Specifies how the bands of the input rasters are 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

范围示例

计算其中包含三个多波段栅格中最大值和最小值之间差值的栅格对象。

from arcpy.ia import * 

rc = RasterCollection([landsat_1, landsat_2, landsat_3]) 

range_raster = Range(rc, extent_type = "UnionOf", cellsize_type = "MinOf", 
	ignore_nodata = True, process_as_multiband = True)