ATan (Spatial Analyst)
Resumen
Calcula la tangente inversa de celdas en un ráster.
Ilustración
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OutRas = ATan(InRas) |
Uso
In mathematics, all Trigonometric functions have a defined range of valid input values, called the domain. The output values from each function also has a defined range. For this tool:
The Domain is : -∞ < [in_value] < ∞
The Range is : -pi/2 ≤ [out_value] ≤ pi/2
Note that here -∞ and ∞ represent the smallest negative and largest positive value supported by the particular raster format, respectively.
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Los valores de entrada para ATan se interpretan sin unidades.
Output values are always floating point, regardless of the input data type.
The output values from this tool are in radians. If degrees are desired, the resulting raster must be multiplied by the radians-to-degrees conversion factor of 180/pi, or approximately 57.296.
See here for examples of converting output values from radians to degrees.
Sintaxis
| Parámetro | Explicación | Tipo de datos |
in_raster_or_constant |
La entrada para la cual se calculan los valores de la tangente inversa. In order to use a number as an input for this parameter, the cell size and extent must first be set in the environment. | Raster Layer | Constant |
Valor de retorno
| Nombre | Explicación | Tipo de datos |
| out_raster |
The output raster. Los valores son la tangente inversa de los valores de entrada. | Raster |
Ejemplo de código
Este ejemplo calcula la tangente inversa de los valores del ráster GRID de entrada.
import arcpy
from arcpy import env
from arcpy.sa import *
env.workspace = "C:/sapyexamples/data"
outATan = ATan("degs")
outATan.save("C:/sapyexamples/output/outatan")
Este ejemplo calcula la tangente inversa de los valores del ráster GRID de entrada y saca un ráster TIFF.
# Name: ATan_Ex_02.py
# Description: Calculates the inverse tangent of cells in a raster
# Requirements: Spatial Analyst Extension
# Import system modules
import arcpy
from arcpy import env
from arcpy.sa import *
# Set environment settings
env.workspace = "C:/sapyexamples/data"
# Set local variables
inRaster = "degs"
# Check out the ArcGIS Spatial Analyst extension license
arcpy.CheckOutExtension("Spatial")
# Execute ATan
outATan = ATan(inRaster)
# Save the output
outATan.save("C:/sapyexamples/output/outatan.tif")