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Table AS-2. Obstacle data numerical requirements
Area 1 Area 2 Area 3
Vertical accuracy 30 m 3 m 0.5 m
Vertical resolution 1 m 0.1 m 0.01 m
Horizontal accuracy 50 m 5 m 0.5 m
Confidence level (I o) 90% 90% 90%
Data classification
Integrity level
routine
1 x 1w3
essential
1 x 10-5
essential
1 x 10-5
Maintenance period as required as required as required
APP 8-5
Annex IS - Aeronautical Information Services Appendix 8
Table AS-3. Terrain attributes
, Terrain attribute MandatorylOptional
Area of coverage Mandatory
Data originator identifier Mandatory
Acquisition method Mandatory
Post spacing Mandatory
Horizontal reference system
Horizontal resolution
Horizontal accuracy
Horizontal confidence level
Horizontal position
Elevation
Elevation reference
Vertical reference system
Vertical resolution
Vertical accuracy
Vertical confidence level
Surface type
Recorded surface
Penetration level
Known variations
Integrity
Date and time stamp
Unit of measurement used
Mandatory
Mandatory
Mandatory
Mandatory
Mandatory
Mandatory
Mandatory
Mandatory
Mandatory
Mandatory
Mandatory
Mandatory
Mandatory
Optional
Optronal
Mandatory
Mandatory
Mandatory
APP 8-6
Appendix 8 Annex IS - Aeronautical Information Services
Table A8-4. Obstacle attributes
Obstacle attribute
Area of coverage
Data originator identifier
Obstacle identifier
Horizontal accuracy
Horizontal confidence level
Horizontal position
Horizontal resolution
Horizontal extent
Horizontal reference system
Elevation
Vertical accuracy
Vertical confidence level
Elevation reference
Vertical resolution
Vertical reference system
Obstacle type
Geometry type
Integrity
Date and time stamp
Unit of measurement used
Operations
Effectivity
Mandatory/Optional
Mandatory
Mandatory
Mandatory
Mandatory
Mandatory
Mandatory
Mandatory
Mandatory
Mandatory
Mandatory
Mandatory
Mandatory
Mandatory
Mandatory
Mandatory
Mandatory
Mandatory
Mandatory
Mandatory
Mandatory
Optional
Optional
- END -
APP 8-7
ICAO TECHNICAL PUBLICATIONS
The following summary gives the status, and also
describes in general terms the contents of the various
series of technical publications issued by the
international Civil Aviation Organization. it does not
include specialized publications that do nor fall
specifically within one of the series, such a.s the
Aeronautical Chart Catalogue or the Meteorological
Tables for International Air Navigation.
International Standards and Recommended
Practices are adopted by the Council in accordance with
Articles 54, 37 and 90 of the Convention on
International Civil Aviation and are designated, for
convenience, as Annexes to the Convention. The
uniform application by Contracting States of the
specifications contained in the International Standards is
recognized as necessary for the safety or regularity of
international air navigation while the uniform
application of the specifications in the Recommended
Practices is regarded as desirable in the interest of
safety, regularity or efficiency of international air
navigation. Knowledge of any differences between the
national regulations or practices of a State and those
established by an International Standard is essential to
the safety or regularity of international air navigation. In
the event of non-compliance with an International
Standard, a State has, in fact, an obligation, under
Article 38 of the Convention, to notify the Council of
any differences. Knowledge of differences from
Recommended Practices may also be important for the
safety of air navigation and, although the Convention
does not impose any obligation with regard thereto, the
Council has invited Contracting States to notify such
differences in addition to those relating to International
Standards.
Procedures for Air Navigation Services (PANS)
are approved by the Council for worldwide application.
They contain, for the most part, operating procedures
regarded as not yet having attained a sufficient degree of
maturity for adoption as Intemational Standards and
Recommended Practices, as well as material of a more
permanent character which is considered too detailed for
　
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