ASin (Spatial Analyst)
Resumen
Calcula el seno inverso de celdas en un ráster.
Ilustración
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OutRas = ASin(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 : -1 ≤ [in_value] ≤ 1
Note that any input value that is outside this domain will receive NoData on the output raster.
The Range is : -pi/2 ≤ [out_value] ≤ pi/2
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Los valores de entrada para ASin 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 del seno inverso. 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 seno inverso de los valores de entrada. | Raster |
Ejemplo de código
Este ejemplo calcula el seno inverso de los valores del ráster GRID de entrada.
import arcpy
from arcpy import env
from arcpy.sa import *
env.workspace = "C:/sapyexamples/data"
outASin = ASin("degs")
outASin.save("C:/sapyexamples/output/outasin")
Este ejemplo calcula el seno inverso de los valores del ráster GRID de entrada y saca un ráster IMG.
# Name: ASin_Ex_02.py
# Description: Calculates the inverse sine 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 ASin
outASin = ASin(inRaster)
# Save the output
outASin.save("C:/sapyexamples/output/outasin.img")