Runway ID RWID Scaling SCALx Scaling SCALy Scaling SCALz

254 © 2016 Open Geospatial Consortium Figure 5-31: RTAI Typical Usage Histogram ● Identifier: RTAI ● Code: 0053 ● Data Type: numeric ● Length: 3 characters ● Format: integer ● Range: 0 to 100 ● Usage Note: Mandatory. All features should be tagged with an appropriate value for the reasons stated above. ● Unit: Percentage ● Default: None ● Compatibility: OGC CDB 1.0

5.7.1.3.55 Runway ID RWID

Description: An alphanumeric identifier that uniquely identifies a runway for a given airport; this ID must match the value of the field Ident of the Runway or Helipad dataset. ● Identifier: RWID ● Code: 0054 ● Data Type: Alphanumeric ● Length: 6 characters ● Format: NA ● Range: NA ● Usage Note: Recommended for all Airport Light Points features. Failure to appropriately tag airport culture with RWID attribute will result in reduced control of runway-related or helipad culture by simulator. Optional for PointLinealPolygon features, Location Points Features, Environmental Light Point features, and Moving Model Location features that are associated with a runway and for which control of the feature is desirable. The combination of RWID and APID points to a unique record of the NavData Runway or Helipad dataset components. Note that all of the lights and other features located in vector datasets that are associated with the operation of a runway or helipad are required to reference a runway or helipad in the NavData dataset; the RWID attribute is not required for features unrelated to a runway or helipad. ● Unit: NA 255 © 2016 Open Geospatial Consortium ● Default: None ● Compatibility: OGC CDB 1.0

5.7.1.3.56 Scaling SCALx

5.7.1.3.57 Scaling SCALy

5.7.1.3.58 Scaling SCALz

Description: A set of scaling factors, one of the model axis, to be applied to the rendering of model geometry by the client-device. A value of 1.0 instructs the client-devices to use the model as-is. The physical dimension of models processed by client-device should approach zero, as SCALing tends to zero. The value of SCALing should also be accounted for by client-devices in combination with other information to determine the appropriate distance at which the model should be paged-in, rendered or processed. All three SCALing factors are optional. Values of zero and negative values are not permitted. ● Identifiers: SCLAx, SCALy, SCALz ● Codes: 0055, 0056, 0057 ● Data Type: numeric ● Length: 9 characters ● Format: floating-point recommended precision 3.5 ● Range: 000.00001 to 999.99999 ● Usage Note: Optional. CDB readers should default to a value of 1.0 if SCALx, SCALy, or SCALz is missing. ● Unit: NA ● Default: 1.0 ● Compatibility: CDB 3.0

5.7.1.3.59 Start Junction ID SJID