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Indian Spring Low Water (VDC_4)

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

RDF: vdc_4.ttl

Name

indianSpringLowWater

Attribute

VDC Sounding Datum

Definition

A tidal surface datum approximating the level of the mean of the lower low water at spring tides.

Description

This tidal datum approximates the lowest water level observed at a location and is usually below that of the lower low water at spring tides.

Synonyms

ISLW; Indian Tidal Plane

Accepted

2013-10-18

Allowed for

• BA000 Water Line
• BE021 Low Water Line
• ZI012 Sounding Metadata

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