Slope

Краткая информация

Представляет скорость изменения высоты для каждого пиксела.

Обсуждение

Дополнительные сведения о работе этой функции см. растровую функцию Уклон.

Указанный набор растровых данных является временным для растрового объекта. Чтобы сделать его постоянным, вы можете вызвать метод растрового объекта save.

Синтаксис

Slope (dem, {z_factor}, {slope_type}, {ps_power}, {psz_factor}, {remove_edge_effect})

Параметр	Описание	Тип данных
dem	The input elevation raster.	Raster
z_factor	The z-factor is a scaling factor used to convert the elevation values for two purposes: To convert the elevation units (such as meters or feet) to the horizontal coordinate units of the dataset, which may be feet, meters, or degrees. To add vertical exaggeration for visual effect. If the x,y units and z units are in the same units of measure, the z-factor should be set to 1. The z-values of the input surface are multiplied by the z-factor when calculating the final output surface. (Значение по умолчанию — 1)	Double
slope_type	The inclination of slope can be output as either a value in degrees, or percent rise. Specify one of the following: DEGREE, PERCENTRISE, or SCALED. For more information, see Slope function. (Значение по умолчанию — DEGREE)	String
ps_power	Accounts for the altitude changes (or scale) as the viewer zooms in and out on the map display. It is the exponent applied to the pixel size term in the equation that controls the rate at which the z-factor changes to avoid significant loss of relief. This parameter is only valid when the slope_type is SCALED. (Значение по умолчанию — 0.664)	Double
psz_factor	Accounts for changes in scale as the viewer zooms in and out on the map display. The value controls the rate at which the z-factor changes. This parameter is only valid when the slope_type is SCALED. (Значение по умолчанию — 0.024)	Double
remove_edge_effect	Using this option will avoid any resampling artifacts that may occur along the edges of a raster. The output pixels along the edge of a raster or beside pixels without a value will be populated with NoData; therefore, it is recommended that this option be used only when there are other rasters with overlapping pixels available. When overlapping pixels are available, these areas of NoData will display the overlapping pixel values instead of being blank. False—Bilinear resampling will be applied uniformly to resample the output. True—Bilinear resampling will be used to resample the output, except along the edges of the rasters or beside pixels of NoData. These pixels will be populated with NoData. This will reduce any sharp edge effects that might otherwise occur. (Значение по умолчанию — False)	Boolean

Возвращаемое значение

Тип данных	Описание
Raster	Выходной растр.

Пример кода

Slope, пример 1

В этом примере вычисляется уклон для заданного рельефа.

from arcpy.ia import *
out_slope_raster = Slope("elevation.tif")
out_slope_raster.save("C:/arcpyExamples/outputs/slope.tif")

Slope, пример 2

В этом примере вычисляется уклон для заданного рельефа.

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

# Set the analysis environments
arcpy.env.workspace = "C:/arcpyExamples/data"

# Set the local variables
in_dem = "elevation.tif"

# Execute the Slope function
out_slope_raster = Slope(in_raster)

# Save the output
out_slope_raster.save("C:/arcpyExamples/outputs/slope.tif")