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Terrain and coastal elevation study

This retained study uses the earlier geographic frame and composition. It is separate from the quiet default poster.

The coastal overlay is a +4 m EGM2008 scenario on modern terrain, computed at DeltaDTM’s native one-arcsecond spacing (about 30 m) with Gulf connectivity. It is not a dated ancient shoreline. Sedimentation, subsidence, historical sea levels and ancient channels are not reconstructed. EGM2008 is a geoid reference, not local mean sea level. Ecological colour describes broad landscapes, not a dated wetland extent.

Flood method and source hashes · Native GeoTIFF · 4 m polygons · Threshold sensitivity: 3 m / 5 m (not confidence limits) · Terrain provenance · Study SVG

GSHHG · HydroRIVERS · Pleiades · Ramsar · RESOLVE 2017 · Mapzen / USGS. DeltaDTM 1.1.1: Maarten Pronk, CC BY 4.0, produced using Copernicus WorldDEM-30 © DLR e.V. 2010–2014 and © Airbus Defence and Space GmbH 2014–2018, provided under COPERNICUS by the European Union and ESA; all rights reserved. Full credits and licenses.