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Hydrographic Base Reference Datum (HBR)

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

RDF: hbr.ttl

Name

hydroBaseRefDatum

Datatype

Enumeration

Definition

The sounding datum to which the hydrographic base height is referenced.

Description

It is usually taken to correspond to a high water stage of the tide.

Accepted

2023-08-14

Defined by

DFDD

Values

• HBR_10 Mean Higher High Water
• HBR_15 Mean Sea Level
• HBR_24 Mean Higher High Water Springs
• HBR_28 Highest High Water
• HBR_30 Indian Spring High Water
• HBR_7 Mean High Water
• HBR_9 Mean High Water Springs

Used by

• ZI400 Hydrographic Base Height Information

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