DOF To Obstacle Features (Intelligence)

Summary

Converts the U.S. Federal Aviation Administration (FAA) Digital Obstacle File (DOF) to obstruction points and obstruction buffer features.

Usage

• The U.S. FAA DOF specification and dataset can be reviewed at https://www.faa.gov/air_traffic/flight_info/aeronav/digital_products/dof/. The table is a comma-separated values file (.csv).

• Output obstacle buffers are created at a distance of 10 times the obstruction object height (meters) based on criteria from US Army Field Manual 3-21.38 Pathfinder Operations, Chapter 4 Helicopter Landing Zones, Section 4-16. For example, a 5 meter obstacle will have a 50 meter buffer.

• The Input Table must contain numeric AMSL and AGL fields pursuant to FAA DOF standards.

Parameters

Dialog

Label	Explanation	Data Type
Input Table	The input DOF table to convert into obstacle features.	Table View
Output Obstacle Features	The point obstacle features created from the Input Table.	Feature Class
Output Obstacle Buffers	The distance buffers created at 10 times the value of the AGL field in the Input Table.	Feature Class
Clip Features (Optional)	An area to clip from the Input Table. Only obstacles within this area will be created and buffered.	Feature Layer

Python

arcpy.intelligence.DOFToObstacleFeatures(in_table, out_obstacle_features, out_obstacle_buffers, {clip_features})

Name	Explanation	Data Type
in_table	The input DOF table to convert into obstacle features.	Table View
out_obstacle_features	The point obstacle features created from the in_table.	Feature Class
out_obstacle_buffers	The distance buffers created at 10 times the value of the AGL field in the in_table.	Feature Class
clip_features (Optional)	An area to clip from the in_table. Only obstacles within this area will be created and buffered.	Feature Layer

Code sample

DOFToObstacleFeatures example 1 (Python window)

The following Python window script demonstrates how to use the DOFToObstacles function in immediate mode.

import arcpy
arcpy.intelligence.DOFToFeatures("C:/data/dof.csv", 
                                 "C:/data/results.gdb/obstacles", 
                                 "C:/data/results.gdb/buffers", 
                                 "C:/data/tasking.gdb/aoi")

DOFToObstacleFeatures example 2 (stand-alone script)

The following Python script demonstrates how to use the DOFToObstacleFeatures function in a stand-alone script.

# Name: DOFToObstacleFeatures_Example2.py
# Description: Convert DOF records to obstacle features.

# Import system modules
import os
import arcpy

# Set local variables
working_mty = r"d:\working\monterey"
in_dof_csv = os.path.join(working_mty, "dof.csv")
out_obx = os.path.join(working_mty, "results.gdb", "obstacles")
out_buf = os.path.join(working_mty, "results.gdb", "buffers")
aoi = os.path.join(working_mty, "tasking.gdb", "mtyAOI")

arcpy.env.outputCoordinateSystem = arcpy.SpatialReference(32611) # UTM Zone 11

# Run DOFToObstacleFeatures
arcpy.intelligence.DOFToFeatures(in_dof_csv, out_obx, out_buf, aoi)

Environments

This tool does not use any geoprocessing environments.