Question: The oisSurfaceCondition attribute seems inappropriate for Obstruction Identification Surfaces. Should I populate it? And if so, with what value?
Answer: The oisSurfaceCondition attribute is relevant for Obstruction Areas, but not Obstruction Identification Surfaces. A correction will be made in the next release of AC 150/5300-18b.
In the meantime, populate this attribute as “PRIMARY” for all ObstructionIdentificationSurfaces.Return to the Airports GIS Table of Contents: