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Terrain Gap Width (WD3)
DGIF baseline 2026-1, the latest. Earlier baselines: timemap.
RDF: wd3.ttl
- Name
terrainGapWidth- Datatype
- Real
- Definition
- The minimum horizontal bridging distance necessary to cross a channel.
- Description
- The width is measured perpendicular to the direction of water flow from bank to bank, at the first usable break in slope on each side of the channel above mean high water. Usable banks are those accessible by vehicles; small unusable ledges and cliffs are not considered usable breaks in slopes.
- Synonyms
- Military Gap Width
- Accepted
- 2013-10-18
- Defined by
- DFDD
- Physical quantity
- length
- Recommended unit
- Metre (m)
- Used by
Source: DGIF 2026-1 QEA model, DGIWG. Standard: DGIWG 206-3. Licence: CC BY 4.0, © DGIWG.