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Horizontal Angle Of Longest Axis (HLA)

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

RDF: hla.ttl

Name

horizontalAngleOfLongestAxis

Datatype

Real

Definition

The angular distance in the horizontal plane measured from true north (0 degrees) clockwise to the longest axis of the feature (0-180 degrees).

Description

This measure would be populated with the 'not applicable' value for a circular feature.

Accepted

2021-08-03

Physical quantity

planeAngle

Recommended unit

Arc Degree

Used by

• AL018 Building Superstructure
• AL014 Non-building Structure
• AL013 Building
• AF040 Crane
• AK160 Stadium
• AM060 Surface Bunker
• AH060 Underground Bunker
• BD180 Wreck
• DB160 Rock Formation

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