Cos (Spatial Analyst)
Resumen
Calcula el coseno de celdas en un ráster.
Ilustración
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OutRas = Cos(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 : -1 ≤ [out_value] ≤ 1
Note that here -∞ and ∞ represent the smallest negative and largest positive value supported by the particular raster format, respectively.
The input values for this tool are interpreted to be in radians. If the input you wish to use is in degrees, the values must first be divided by the radians-to-degrees conversion factor of 180/pi, or approximately 57.296.
See here for examples of converting input values that are in degrees to the expected units of radians.
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Los valores de salida del Cos se interpretan sin unidades.
Output values are always floating point, regardless of the input data type.
Debido al rango de valores, puede ser útil aplicar un renderizador de extensión lineal para ver mejor los resultados.
Sintaxis
| Parámetro | Explicación | Tipo de datos |
in_raster_or_constant |
La entrada para la cual se calculan los valores del coseno. 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 el coseno de los valores de entrada. | Raster |
Ejemplo de código
Este ejemplo calcula el coseno de los valores del ráster GRID de entrada.
import arcpy
from arcpy import env
from arcpy.sa import *
env.workspace = "C:/sapyexamples/data"
outCos = Cos("degs")
outCos.save("C:/sapyexamples/output/outcos")
Este ejemplo calcula el coseno de los valores del ráster GRID de entrada y saca un ráster TIFF.
# Name: Cos_Ex_02.py
# Description: Calculates the cosine 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 Cos
outCos = Cos(inRaster)
# Save the output
outCos.save("C:/sapyexamples/output/outcos.tif")