Question: What values should I use to populate the penValSpecified and penValSupplemental attributes of the Obstacle and Obstruction Area feature classes?

Answer: All points should have penValSpecified include the vertical distance the obstacle protrudes through the penetrated surface, or show 0 if it doesn’t protrude.

If an obstacle protrudes through many surfaces, populate penValSpecified with the greatest value of the penetration. Populate penValSupplemental with the next greatest penetration.

If the obstacle protrudes through only one surface, populate penValSupplemental with 0.

Return to the Airports GIS Table of Contents: