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Relative Elevation Model (REM) QGIS 4 compatibility
Not QGIS 4 ready Active
Not yet — the latest version declares max QGIS version 3.99.0, so it is not offered to QGIS 4 users.
Generates a Relative Elevation Model (REM): a raster showing how high each cell sits above the nearest river channel, revealing floodplain features such as levees, palaeochannels and terraces. Includes a semi-automatic river line extractor.
About
This plugin adds two Processing tools under "REM Tools": 1. Create River Line from DEM (semi-automatic): extracts a river/channel network from a DEM using fill sinks, flow accumulation, thresholding and thinning. The result is meant to be inspected and cleaned by hand before use. For very flat areas (e.g. the Sudd) a hand-drawn line is recommended instead. 2. Generate Relative Elevation Model (REM): samples DEM elevation along the river line, interpolates a smooth river surface (IDW), and subtracts it from the DEM to produce the REM. IMPORTANT: the DEM and the river line MUST share the same projected (metre-based) coordinate reference system. Geographic (degree-based) data will not work correctly. The output REM is loaded with a bundled 0-10 m colour ramp suited to floodplain mapping.
| Author | Ishiba RO |
|---|---|
| Downloads | 810 |
| Latest version | 1.0.0 |
| Last updated | 2026-06-17 (120 days ago) |
| Min QGIS | 3.16.0 |
| Max QGIS | 3.99.0 |
| QGIS 4 ready | No |
| Maintenance | Active |
| Categories | Raster & terrain, Hydrology & water |
| Tags | dem, elevation, floodplain, relative elevation model, archaeology, rem, geomorphology, hydrology, raster, river |
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Maintenance: Active = updated within 1 year, Quiet = 1–3 years, Likely abandoned = over 3 years.