Find Highest Or Lowest Point (Defense)

Available with Spatial Analyst license.

Summary

Finds the highest or lowest point of the input surface within a defined area.

Usage

• The output may contain more than one highest or lowest point if points with identical values are found.

• The output contains a field named Elevation with the elevation value of the highest or lowest point. The units of the highest or lowest elevation point are the z-units (elevation) of the input surface. Check the input surface metadata for this unit.

Parameters

Dialog

Label	Explanation	Data Type
Input Surface	The input elevation raster surface.	Raster Layer; Mosaic Dataset; Mosaic Layer
Output Feature Class	The feature class containing the output highest or lowest point.	Feature Class
Highest or Lowest Point	Specifies the type of operation the tool will perform. Highest points—The highest points will be found. This is the default. Lowest points—The lowest points will be found.	String
Input Area (Optional)	The input polygon feature class within which the highest or lowest point will be found.	Feature Set

Python

arcpy.defense.FindHighestLowestPoint(in_surface, out_feature_class, high_low_operation_type, {in_feature})

Name	Explanation	Data Type
in_surface	The input elevation raster surface.	Raster Layer; Mosaic Dataset; Mosaic Layer
out_feature_class	The feature class containing the output highest or lowest point.	Feature Class
high_low_operation_type	Specifies the type of operation the tool will perform. HIGHEST—The highest points will be found. This is the default. LOWEST—The lowest points will be found.	String
in_feature (Optional)	The input polygon feature class within which the highest or lowest point will be found.	Feature Set

Code sample

FindHighestLowestPoint example 1 (Python window)

The following Python window script demonstrates how to use the FindHighestLowestPoint function.

import arcpy
arcpy.env.workspace = r"C:/Data.gdb"
arcpy.defense.FindHighestLowestPoint("n36.dt2","FindHighestPoint",
                                     "HIGHEST", "AOI")

FindHighestLowestPoint example 2 (stand-alone script)

The following example uses the FindHighestLowestPoint function in a sample workflow.

# Description: Find highest point at an airport - can be a possible obstruction.

# Import system modules
import arcpy

# Set environment settings
arcpy.env.workspace = r"C:/Data.gdb"
arcpy.env.overwriteOutput = True

# Select Charlotte airport area from airports layer
airports = "Airports"
whereClause = "airport_code = 'CLT'"
clt_layer = arcpy.management.SelectLayerByAttribute(airports,
                                                    "NEW_SELECTION",
                                                    whereClause)
# Inputs
input_surface = "n36.dt2"

# Find highest point in the Charlotte airport area
arcpy.defense.FindHighestLowestPoint(input_surface,
                                     "FindHighestPoint",
                                     "HIGHEST",
                                     clt_layer)

Environments

Output Coordinate System, Extent, Current Workspace, Scratch Workspace

Licensing information

• Basic: Yes
• Standard: Yes
• Advanced: Yes