Available with Aviation Airports license.
Available with Aviation Charting license.
Summary
Creates obstruction identification surfaces (OIS) based on the ICAO Annex 4 specification for the Precision Approach Terrain chart.
These surfaces are designed to aid in the analysis of the terrain and features within a defined portion of the final approach that is depicted on the Precision Approach Terrain chart type. To generate the surfaces, a runway centerline is needed as a reference for the surfaces. This tool generates the surfaces as polygon or multipatch features.
Usage
The Input Runway Features parameter must be z-enabled.
The Target OIS Features parameter must be z-enabled.
If a feature class is selected in Target OIS Features, it must have a vertical spatial reference.
OIS tools are flexible and accept a variety of input and output feature class types. For more information, see the OIS Input and Output schemas.
The Input Airport Control Point Feature parameter can be used to supply x-, y-, and z-geometry for displaced threshold features. If displaced thresholds are included, surfaces will be constructed based on their x-, y-, and z-geometry instead of their corresponding runway feature endpoint.
Syntax
arcpy.aviation.ICAOAnnex4(in_features, target, {runway_direction}, {length}, {width}, {slope}, {height}, {airport_control_point_feature_class})
Parameter | Explanation | Data Type |
in_features | The input runway dataset. The feature class must be z-enabled and contain polylines. | Feature Layer |
target | The target feature class that will contain the generated obstruction identification surfaces. | Feature Layer |
runway_direction (Optional) | Specifies at which end of the runway the approach surface will be created.
| String |
length (Optional) | The length of the surface in meters. The default value is 900. | Double |
width (Optional) | The width of the surface in meters. The default value is 120. | Double |
slope (Optional) | The slope of the surface in degrees. The default value is 3. | Double |
height (Optional) | The start height of the surface in meters. The default value is 15.24. | Double |
airport_control_point_feature_class (Optional) | Supplies x-, y-, and z-geometry for displaced threshold features. If displaced thresholds are included, surfaces will be constructed based on their x-, y-, and z-geometry instead of their corresponding runway feature endpoint. | Feature Layer |
Derived Output
Name | Explanation | Data Type |
derived_outfeatureclass | The updated feature class containing the generated obstruction identification surfaces. | Feature Layer |
Code sample
The following Python window script demonstrates how to use the ICAOAnnex4 tool.
import arcpy
# set gp environment
arcpy.env.workspace = "c:/data/ois.gdb"
arcpy.CheckOutExtension("Airports")
# Input Runway Feature Class
inFeatures = "RunwayCenterline"
# feature class that will contain the OIS surface
outFeatureClass = "ObstructionIdSurface"
# runway variables
runwayDir = "HIGH_END_TO_LOW_END"
length = 900
width = 120
slope = 3
start_height = 15.24
#_Exec_ICAOAnnex4
arcpy.ICAOAnnex4_aviation(inFeatures, outFeatureClass, runwayDir, length, width, slope, start_height)
arcpy.CheckInExtension("Airports")
Environments
Licensing information
- Basic: No
- Standard: Requires Airports, ArcGIS Aviation Charting
- Advanced: Requires Airports, ArcGIS Aviation Charting