Appendix 1 AERONAUTICAL DATA CATALOGUE

Introduction

(a)The aeronautical data catalogue is a reference to the aeronautical data subjects, properties and subproperties organised in:

(1)aerodrome data;

(2)airspace data;

(3)ATS and other routes data;

(4)instrument flight procedure data;

(5)radio navigation aids/systems data;

(6)obstacle data;

(7)geographical position data.

(b)The tables of the aeronautical data catalogue are composed of the following columns:

(1)subject for which data can be collected;

(2)property: an identifiable characteristic of a subject which may be further defined into sub-properties;

(3)same as 2;

(4)types: the data is classified into different types;

(5)description: a description of the data item;

(6)notes: containing additional information or conditions for the provision of the data;

(7)accuracy: requirements for aeronautical data are based on a 95 % confidence level;

(8)integrity classification;

(9)origination type: data is identified as surveyed, calculated or declared;

(10)publication resolution;

(11)chart resolution.

Note for items 2 and 3 under point (b): the classification of a catalogue element as subject, property or sub-property does not impose a certain data model.

Note for item 7 under point (b): for those fixes and points that serve a dual purpose, e.g. holding point and missed approach point, the higher accuracy applies. Accuracy requirements for obstacle and terrain data are based on a 90 % confidence level.

Note for item 10 under point (b): the publication resolutions for geographical position data (latitude and longitude) are applicable to coordinates formatted in degrees, minutes, seconds. When a different format is used (such as degrees with decimals for digital data sets) or when the location is significantly further to the north/south, the publication resolution needs to be commensurate with the accuracy requirements.