Generate OIS Intersection (Aviation)

Available with Aviation Airports license.

Available with Aviation Charting license.


Creates the most restrictive (lowest) surfaces within the extent of all collective surfaces. Obstruction identification surfaces (OIS) determine which objects are vertical obstructions. An object is considered a vertical obstruction if it penetrates the OIS surface. Surfaces are used to support planning and design activities.

Many airports have more than one runway and each runway has a set of obstruction identification surfaces. Supporting automatic generation of new subsurfaces that constitute the overlapping portions of surfaces can have a better visualization and a more accurate analysis for an airport. To generate a single set of surfaces, multiple sets of surfaces are needed. This tool creates surfaces as multipatch features.


  • The Input OIS Features must be z-enabled.

  • The Output OIS Features must be z-enabled.

  • All of the Input OIS Features must have the same projected coordinate system.


GenerateOISIntersection(in_ois_features, out_ois_features, {multipart_feature})
ParameterExplanationData Type

The input OIS features. The feature class must be multipatch.

Feature Layer

The updated feature class containing the meshed OIS with the lowest z-value.

Feature Layer

Specifies whether multipart features will be created in the output. Multipart features are composed of more than one physical part that only references one set of attributes.

  • MULTIPARTMultipart features will be created. This is default.
  • MERGE_ADJACENTAdjacent triangulated multipart features will be created as individual features.

Code sample

GenerateOISIntersection example (Python window)

The following Python window script demonstrates how to use the GenerateOISIntersection tool.

import arcpy
# set gp environment
# Input Obstruction Identification Surface Feature Class
inOISFeatures = r"C:\data\ois.gdb\ObstructionIdSurface"
# Feature class that will contain the OIS surface
outOISFeatures = r"C:\data\ois.gdb\MeshedSurface"
# Create multipart feature
createMultipart = "MULTIPART"
# Processing Generate OIS Intersection tool
arcpy.GenerateOISIntersection_aviation(inOISFeatures, outOISFeatures, createMultipart )


This tool does not use any geoprocessing environments.

Licensing information

  • Basic: No
  • Standard: Requires Airports, ArcGIS Aviation Charting
  • Advanced: Requires Airports, ArcGIS Aviation Charting

Related topics