Slope

摘要

表示各像素的高程变化率。

说明

有关此函数工作原理的详细信息，请参阅坡度栅格函数。

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

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

参数	说明	数据类型
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. (默认值为 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. (默认值为 DEGREE)	String
ps_power	Pixel Size 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. (默认值为 0.664)	Double
psz_factor	Pixel Size Factor accounts for changes in scale as the viewer zooms in and out on the map display. It controls the rate at which the z-factor changes. This parameter is only valid when the slope_type is SCALED. (默认值为 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. (默认值为 False)	Boolean

返回值

数据类型	说明
Raster	输出栅格。

代码示例

Slope 示例 1

本示例将计算给定高程的坡度。

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

Slope 示例 2

本示例将计算给定高程的坡度。

# 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")