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Neighborhood Selection

Available with Geostatistical Analyst license.

Summary

Creates a layer of points based on a user-defined neighborhood.

Neighborhood Selection tool dialog box
The output layer contains the selection set of 10 selected blue points.

For example, you might wish to create a selection of points in a circular neighborhood around a location defined by the Input point. The illustration above demonstrates that the output will be the 10 points, colored blue, that fall within the circle.

Usage

Syntax

GANeighborhoodSelection_ga (in_dataset, out_layer, point_coord, neighbors_max, neighbors_min, minor_semiaxis, major_semiaxis, angle, {shape_type})
ParameterExplanationData Type
in_dataset

Points used to create a neighborhood selection.

Feature Layer
out_layer

Layer to store the neighborhood selection.

Feature Layer
point_coord

The neighborhood center's x,y coordinate.

Point
neighbors_max

The number of points to use in each sector. If a sector has the required number of points, all points in that sector are used.

Long
neighbors_min

The minimum number of points to use in each sector. If the minimum number of required points are not available in any given sector, the nearest available point outside the sector will be selected.

Long
minor_semiaxis

Size of the minor semiaxis of the search neighborhood.

Double
major_semiaxis

Size of the major semiaxis of the search neighborhood.

Double
angle

The angle of rotation of the neighborhood axis.

Double
shape_type
(Optional)

The geometry of the neighborhood.

  • ONE_SECTOR Single ellipse
  • FOUR_SECTORS Ellipse divided into four sectors
  • FOUR_SECTORS_SHIFTED Ellipse divided into four sectors and shifted 45 degrees
  • EIGHT_SECTORS Ellipse divided into eight sectors
String

Code sample

NeighborhoodSelection example 1 (Python window)

Create a feature layer based on some neighborhood criteria.

import arcpy
from arcpy import env
env.workspace = "C:/gapyexamples/data"
arcpy.GANeighborhoodSelection_ga("ca_ozone_pts", "outNS", "-2000000 -50000", 
                                 "20", "5","200000", "200000", "0", "One sector")
NeighborhoodSelection example 2 (stand-alone script)

Create a feature layer based on some neighborhood criteria.

# Name: NeighborhoodSelection_Example_02.py
# Description: Creates a layer of points based on a user-defined neighborhood.
# Requirements: Geostatistical Analyst Extension

# Import system modules
import arcpy

# Set environment settings
arcpy.env.workspace = "C:/gapyexamples/data"

# Set local variables
inPoints = "ca_ozone_pts.shp"
outLayer = "outNS"
pointCoord = "-2000000 -50000"
maxNeighbors = 20
minNeighbors = 5
majSemiaxis = 200000
minSemiaxis = 200000
angle = 0
shape = "One Sector"

# Execute NeighborhoodSelection
arcpy.GANeighborhoodSelection_ga(inPoints, outLayer, pointCoord, maxNeighbors,
                                 minNeighbors, majSemiaxis, minSemiaxis, angle,
                                 shape)

Environments

Licensing information

  • ArcGIS Desktop Basic: Requires Geostatistical Analyst
  • ArcGIS Desktop Standard: Requires Geostatistical Analyst
  • ArcGIS Desktop Advanced: Requires Geostatistical Analyst

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