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For both attributes a dedicated attribute to provide accuracy information is available, lengthAccuracy and widthAccuracy.
Surface
The surface specification of a runway is related to the complete runway as a physical element and not related to the different runway directions.
The SurfaceCharacteristic class groups together the attributes that model characteristics of an airport surface, such as strength, material, etc.
For details about the encoding of the surface characteristics refer to topic Surface Characteristic [SCH].
Coding Rules for Basic Data for Runway
TBD
Coding Examples
See parent topic Runway.