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Slope

Zusammenfassung

Represents the rate of change of elevation for each pixel.

Auswertung

For more information about how this function works, see the Slope raster function.

The referenced raster dataset for the raster object is temporary. To make it permanent, you can call the raster object's save method.

Syntax

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

(Der Standardwert ist 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.

(Der Standardwert ist 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.

(Der Standardwert ist 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.

(Der Standardwert ist 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.

(Der Standardwert ist False)

Boolean
Rückgabewert
DatentypErklärung
Raster

The output raster.

Codebeispiel

Slope example 1

This example calculates the slope for a given elevation.

from arcpy.ia import *
out_slope_raster = Slope("elevation.tif")
out_slope_raster.save("C:/arcpyExamples/outputs/slope.tif")
Slope example 2

This example calculates the slope for a given elevation.

# 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")