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Underground Access Orientation (UAO)

DGIF baseline 2026-1, the latest. Earlier baselines: timemap.

RDF: uao.ttl

Name

undergroundAccessOrient

Datatype

Enumeration

Definition

The ground slope of the floor of the entrance at the point of access for an underground feature (for example: a cave, tunnel or underground extraction mine) as a category.

Accepted

2013-10-18

Defined by

DFDD

Values

• UAO_1 Horizontal
• UAO_2 Slopes Downward
• UAO_3 Vertical Down
• UAO_4 Slopes Upward
• UAO_5 Vertical Up

Used by

• ZI071 Cave Information

Source: DGIF 2026-1 QEA model, DGIWG. Standard: DGIWG 206-3. Licence: CC BY 4.0, © DGIWG.