Data quality, concepts and methodology: Data quality and limitations

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The air carriers must file their data in accordance with the reporting procedures provided by the Aviation Statistics Centre. The quality of the data may be affected by non-sampling errors such as coverage error, response error or coding error.

Users of the airport activity data should be aware of the following limitations:

  1. In order to publish timely data, the Aviation Statistics Centre estimates data that are not received from the carriers in time for the publication. The Aviation Statistics Centre makes every effort to include reported data in the database.
  2. From time to time, participating carriers refile or update previous data submissions. The revisions will be reflected in the database and in the next publication.
  3. Passenger flights which carry cargo on them are classified as passenger flights for the purpose of this publication. The cargo carried on these passenger flights is defined as belly-hold cargo. The belly-hold cargo data are included with the pure cargo data in the cargo tables presented in the Table 2 series.
  4. Cargo data are not collected for the smaller scheduled services.
  5. Charter data are not collected on the smaller charter operations.
  6. The data presented in this publication are broken down into three categories: domestic, transborder and other international. The data are assigned to the categories for each flight segment according to the next stop (for departures) and the last stop (for arrivals) of the aircraft. For example, consider a flight with a routing of Vancouver-Edmonton-Amsterdam. The departure of the flight from Vancouver would be considered domestic, as would the arrival at Edmonton. The departure of the flight from Edmonton for Amsterdam would be considered as other international since the next stop of the aircraft is a foreign point.
  7. Effective January 1, 1988, data for non-revenue passengers and mail are no longer collected for the major scheduled services.

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