# VectorField

## 概要

Visualize flow direction and magnitude information in your raster with vector symbols.

## ディスカッション

For more information about how this function works, see the Vector Field 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.

## 構文

`VectorField (raster_u_mag, raster_v_dir, {input_data_type}, {angle_reference_system}, {output_data_type})`
 パラメーター 説明 データ タイプ raster_u_mag The first input raster, which is either the U value or the magnitude. Raster raster_v_dir The second input raster, which is either the V value or the direction. Raster input_data_type The type of vector field your inputs represent.Unknown —It is unknown whether the inputs represent U-V or Magnitude-Direction.Vector-UV —Input data represents U and V components.Vector-MagDir — Input data represents magnitude and direction. (デフォルト値は次のとおりです Vector-UV) String angle_reference_system Specifies how the direction component was measured. Geographic —0° points due north, and 90° points due east.Arithmetic — 0° points due east, and 90° points due north. (デフォルト値は次のとおりです Geographic) String output_data_type Specifies the type of vector field your output will represent.Vector-UV —Output data represents U and V components.Vector-MagDir —Output data represents magnitude and direction. (デフォルト値は次のとおりです Vector-UV) String

 データ タイプ 説明 Raster The output raster.

## コードのサンプル

VectorField example 1

This example creates a vector field for a multidimensional dataset.

``````from arcpy.sa import *
out_vectorfield_raster = VectorField("magnitude", "direction", "Vector-MagDir",
None, "Vector-UV)
out_vectorfield_raster.save("C:/arcpyExamples/outputs/vector_field_UV.crf")``````
VectorField example 2

This example creates a vector field for a multidimensional dataset.

``````# Import system modules
import arcpy
from arcpy.sa import *

# Set the analysis environments
arcpy.env.workspace = "C:/arcpyExamples/data"

# Set the local variables
# create a multidimensional raster object from hycom.nc that
# contains 2 variables water_u and water_v
hycom_raster = arcpy.Raster("C:/data/hycom.nc", True)

# choose the 2 variables from hycom_raster as 2 multidimensional raster
in_raster_u_mag = Subset(hycom_raster, variables = "water_u")
in_raster_v_dir = Subset(hycom_raster, variables = "water_v")

# Execute VectorField function
out_vectorField_raster = VectorField(in_raster_u_mag, in_raster_v_dir,
"Vector-UV", "Geographic", "Vector-MagDir")

# Save the output
out_vectorField_raster.save("C:/arcpyExamples/vector_field_magdir.crf")``````

#### 関連トピック

##### 関連トピック
1. An overview of the Spatial Analyst functions