Description: This dataset comprises polygons of Federal Aviation Administration (FAA) height notification zones and includes fields for ID number, FAA_NOTIFY (yes or no) and a Gridcode and description for each feature.Air space obstructions are any man made structure built or allowed in the areas immediately surrounding an airport that, as a result of their existence, create or hamper "the efficient use and preservation of the navigable airspace and of airport traffic capacity at public-use airports." These obstructions can be determined to be a hazard to life and property in the areas surrounding airports. To mitigate or prevent the construction of a structures, that when completed may unintentionally act as an airspace obstruction or hazard, the FAA requires notification be given to the FAA. This notification is required in administering 14 CFR Part 77, the FAA's prime objectives are to ensure the safe and efficient use of the navigable airspace. The FAA recognizes that there are varied demands for the use of airspace, both by aviation and non-aviation interests. When conflicts arise out of construction proposals, the FAA emphasizes the need for conserving the navigable airspace. Therefore, early notice of proposed construction or alteration provides the FAA the opportunity to: (1) Recognize potential aeronautical hazards to minimize the adverse effects to aviation. (2) Revise published data or issue a Notice to Airmen (NOTAM) to alert pilots to airspace or procedural changes made as a result of the structure. (3) Recommend appropriate marking and lighting to make objects visible to pilots. Before filing FAA Form 7460- 1, Notice of Proposed Construction or Alteration, construction sponsors should become knowledgeable in the different types of obstruction marking and lighting systems that meet FAA standards. Information about these systems can be obtained from the manufacturers. Proponents can then determine which system best meets their needs based on purchase, installation, and maintenance costs. The FAA will make every effort to accommodate the request. (4) Depict obstacles on aeronautical charts for pilotage and safety. FAA notification is required from "Any person/organization who intends to sponsor any"… "structures higher than 200ft" or structures that intersect a specified inversely conical three dimensional plane surrounding an airport of a given dimension. For the purposes of clarity, I will refer to this three-dimensional model as the FAA height notification surface (or FAAHNS). This surface is defined in the Part 77 rules of the FAA regional guidance document. This dataset can be used to check whether future building of structures of a given height, will intersect FAAHNS surrounding an airport, and subsequently require FAA notification and discretionary approval from the FAA and local/regional planning authorities. It should be noted that any structure greater than 200ft requires notification, regardless of position above ground level. The FAAHNS dataset was created with a series of extracted elevation models that were mathematically differenced between these conical three dimensional surfaces. The initial dataset of vertical distance difference between the FAAHNS and the base elevations above ground level surrounding the runways of the airports, is in actual continuous elevation values. This dataset was later classified into discrete classes of data representing elevation ranges above and below the above ground level base elevation of the airports at distances from the airports. These are represented as a discrete feature class in an ESRI ArcINFO file based geodatabase. Classes range from 1-11 with 1 having the greatest vertical clearance between the FAAHNS and the base elevation, 8 being at equal to or slightly less than the ground level of the runway, and 11 being equal to or greater than 40 ft higher than the FAAHNS (often several hundred feet higher). Areas inside of this dataset within zones 6 and higher are at elevated risk of creating an air space obstruction if building is allowed.
Service Item Id: ebba47a7018d45cda1bb0da1cdd8c0d8
Copyright Text: County of San Diego, Planning and Development Services, LUEG-GIS Service and Federal Aviation Administration.