And bit a bit (Spatial Analyst)
Resumen
Ejecuta la operación Bitwise And sobre los valores binarios de dos rásteres de entrada.
Más información acerca de cómo funcionan las herramientas de Matemática a nivel de bits
Ilustración
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OutRas = BitwiseAnd(InRas1, InRas2) |
Uso
Two inputs are necessary for this bitwise operation to take place.
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The order of inputs is irrelevant for this tool.
If an input is floating-point, the values are converted to integer values through truncation before the bitwise operation is performed.
In bitwise operations:
- Binary values are stored in two's complement.
- The tools work on 32-bit integers.
- The leftmost bit position is reserved for the sign (positive or negative) of the value. If the integer is positive, the bit position is 0; if it's negative, the bit position is 1.
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La operación Bitwise And trata el bit de signo como si fuera cualquier otro bit. Si una o ambas entradas para una ubicación de celda son positivas, la salida es positiva; si ambas entradas son negativas, la salida es negativa.
Sintaxis
| Parámetro | Explicación | Tipo de datos |
in_raster_or_constant1 | The first input to use in this bitwise operation. A number can be used as an input for this parameter, provided a raster is specified for the other parameter. To be able to specify a number for both inputs, the cell size and extent must first be set in the environment. | Raster Layer | Constant |
in_raster_or_constant2 | The second input to use in this bitwise operation. A number can be used as an input for this parameter, provided a raster is specified for the other parameter. To be able to specify a number for both inputs, 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 de celda son el resultado de una operación Bitwise And en las dos entradas. | Raster |
Ejemplo de código
Este ejemplo realiza una operación Bitwise And sobre dos rásteres GRID.
import arcpy
from arcpy import env
from arcpy.sa import *
env.workspace = "C:/sapyexamples/data"
outBitwiseAnd = BitwiseAnd("degs", "negs")
outBitwiseAnd.save("C:/sapyexamples/output/bitand")
Este ejemplo realiza una operación Bitwise And sobre dos rásteres GRID.
# Name: BitwiseAnd_Ex_02.py
# Description: Performs a Bitwise And operation on the binary values
# of two input rasters
# 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
inRaster1 = "degs"
inRaster2 = "negs"
# Check out the ArcGIS Spatial Analyst extension license
arcpy.CheckOutExtension("Spatial")
# Execute BitwiseAnd
outBitwiseAnd = BitwiseAnd(inRaster1, inRaster2)
# Save the output
outBitwiseAnd.save("C:/sapyexamples/output/outband")