From 709decef5757ee2cf357fddc47727c2a337457b3 Mon Sep 17 00:00:00 2001 From: DahnJ Date: Wed, 27 Jul 2022 20:27:01 +0200 Subject: [PATCH] Re-categorize most DEMs as DSM, improve DEM definition Based on the discussion in Issue #2 https://github.com/DahnJ/Awesome-DEM/issues/2 --- README.md | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/README.md b/README.md index 6ca1fbe..7b16dc9 100644 --- a/README.md +++ b/README.md @@ -35,7 +35,7 @@ # Introduction -A [Digital Elevation Model](https://en.wikipedia.org/wiki/Digital_elevation_model) (DEM) represents the elevation of the terrain. +A [Digital Elevation Model](https://en.wikipedia.org/wiki/Digital_elevation_model) (DEM) represents the elevation of the surface. ### DEM vs DSM vs DTM @@ -78,12 +78,12 @@ Note that even a DTM dataset may still be influenced by the actual surface heigh ### Summary | Dataset | Type | Horizontal resolution (m) | Vertical accuracy (m) | Data collection period | Method | Notes | |:------------------|:-------|:----------------------------|:------------------------|:-------------------------|:-----------------------|:--------------------------------------------------| -| ASTER GDEM V3 | DTM | 30 | 17 | 2000-2011 | Photogrammetry | | -| SRTM DEM V3 | DTM | 30 USA, 90 outside | 9 | 2000 | InSAR | Coverage between 60° north and 56° south latitude | -| NASADEM | DTM | 30 | | 2000 | InSAR | Reprocessing of SRTM | +| ASTER GDEM V3 | DSM | 30 | 17 | 2000-2011 | Photogrammetry | | +| SRTM DEM V3 | DSM | 30 USA, 90 outside | 9 | 2000 | InSAR | Coverage between 60° north and 56° south latitude | +| NASADEM | DSM | 30 | | 2000 | InSAR | Reprocessing of SRTM | | AW3D30 | DSM | 30 | 5 | 2006-2011 | Photogrammetry | | | COPERNICUS GLO-30 | DSM | 30 | 4 | 2011-2015 | InSAR | Based on WorldDEM | -| MERIT | DTM | 90 | 12 | 2000, 2006-2011 | InSAR + Photogrammetry | Created from SRTM + AW3D30 | +| MERIT | DSM | 90 | 12 | 2000, 2006-2011 | InSAR + Photogrammetry | Created from SRTM + AW3D30 | | FABDEM | DTM | 30 | 1.12-2.88 (mean error) | 2011-2015 | InSAR | Used ML to remove buildings+trees from GLO-30 | | TanDEM-X 90m | DSM | 90 | 10 | 2010-2015 | InSAR | |