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This section provides supporting material for the encoding of AMD features. Content

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Limitations

The supporting material alone will not guarantee that an ED-99/DO-272 compliant Aerodrome Mapping Database is created. This can only be done by applying

  • the data product specification rules and
  • the complete functional and geometrical constraints

within ED-99This includes the list of ED-99()/DO-272 and its normative encoding found in ED-119/DO-291.

In addition, where calculations or geometrical mergings are required, visual verification of the result will be required.

In some cases, additional steps are required by the implementer. For example:

  • AIXM 5.1.1 allows the use of the geometrical curves and geodesics. ED-99/DO-272 only allows line-strings. Therefore the curve will need to be transformed into a line-string. Details on such transformations are out of the scope of this site.
    • The AMDB Default values will need to be added to the AMDB where the AIXM 5.1.1 data is missing elements that are mandatory in AMDB.

    () AMDB features and how they map into the corresponding AIXM 5.1.1 AMD features.

    The encoding of features in AIXM 5.1.1 is further documented per feature.

    Excerpt
    Note

    The correspondences between the AMDB features and the AIXM AMD 5.1.1. features provide guidance on how to translate the content of one model to another based on the structures of the models.

    However, care must be taken to ensure that:

    • the content is translated according to the specific business rules and data encoding requirements for the intended applications; and
    • the result is operationally correct and that the data is coherent and consistent.

    The quality of the result can be checked by validating the data and ensuring that it supports the intended applications.

    An example of where care is needed is the translation of wingspan data (see https://ext.eurocontrol.int/aixm_confluence/display/ACGAMD/TaxiwayGuidanceLine+correspondence).



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