DOI: https://doi.org/10.5069/G99021ZF
OT Collection ID: OT.092022.3035.1
OT Collection Name: Continental Europe Digital Terrain Model
Short Name: EU_DTM
Collection Platform: Satellite Data

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Download and Access Products: 
	1. Raster
		opentopoID: OTSDEM.092022.3035.1
		Data Processing: https://portal.opentopography.org/raster?opentopoID=OTSDEM.092022.3035.1


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Collection Overview: This Digital Terrain Model (DTM) for Continental Europe was derived using Ensemble Machine Learning (EML) with publicly available Digital Surface Models. EML was trained using GEDI level 2B points (Level 2A; "elev_lowestmode") and ICESat-2 (ATL08; "h_te_mean"). About 9 million points were overlaid vs MERITDEM, AW3D30, GLO-30, EU DEM, GLAD canopy height, tree cover and surface water cover maps. An ensemble prediction model (mlr package in R) was fitted using random forest, Cubist and GLM, and used to predict the most probable terrain height (bare earth).  The predicted elevations are based on the GEDI data hence the reference water surface (WGS84 ellipsoid) is about 43 m higher than the sea water surface for a specific EU country. Before modeling, reference elevations were corrected to the Earth Gravitational Model 2008 (EGM2008) by using the 5-arcdegree resolution correction surface (Pavlis et al, 2012). 

 Details on the work to create this dataset can be found here: Hengl, Tomislav, Leal Parente, Leandro, Krizan, Josip, and Bonannella, Carmelo. 2020. "Continental Europe Digital Terrain Model at 30 M Resolution Based on GEDI, Icesat-2, AW3D, GLO-30, EUDEM, MERIT DEM and Background Layers." Zenodo. https://doi.org/10.5281/zenodo.4724549.  
European Digital Terrain Models (EU DTM)  

NOTE:This dataset has been converted from its original units of decimeters to meters to aid comparisons with other datasets in the OpenTopography catalog.

Dataset Acknowledgement: Hengl, Tomislav, Leal Parente, Leandro, Krizan, Josip, and Bonannella, Carmelo. 2020. “Continental Europe Digital Terrain Model at 30 M Resolution Based on GEDI, Icesat-2, AW3D, GLO-30, EUDEM, MERIT DEM and Background Layers”. Zenodo. https://doi.org/10.5281/zenodo.4724549.

Dataset Citation: Hengl, Tomislav, Leal Parente, Leandro, Krizan, Josip, and Bonannella, Carmelo. 2022. Continental Europe Digital Terrain Model.  Distributed by OpenTopography. https://doi.org/10.5069/G99021ZF. Accessed: 2024-04-23

Use License: CC BY 4.0

Dataset Keywords: Europe, MERIT, ALOS, GEDI, ICESat-2, machine learning, DTM

Survey Date: 01/01/2000 - 12/31/2018
Publication Date: 09/13/2022

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Data Provider and Roles:
	1. OpenGeoHUB
	Role: Contact
	Url: Not Available.

	2. The Innovation and Networks Executive Agency
	Role: Funder
	Url: https://ec.europa.eu/inea/en/connecting-europe-facility/cef-telecom/2018-eu-ia-0095

	3. OpenDataScience
	Role: Partner
	Url: https://opendatascience.eu/geoharmonizer-project/

	4. OpenGeoHUB
	Role: Partner
	Url: https://opengeohub.org/


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Total number of points: N/A

Area: 6,337,822 km^2

Point Density: N/A

Coordinates System: 
	Horizontal: ETRS89-extended / LAEA Europe [EPSG: 3035]
	Vertical: EGM2008 [EPSG: 3855]

Survey Report: https://object.cloud.sdsc.edu:443/v1/AUTH_opentopography/www/metadata/Euro_DTM_metadata.pdf


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Dataset Extent in KMZ format: https://portal.opentopography.org/getKml?otCollectionID=OT.092022.3035.1&download=true

Dataset Spatial Bounds:
	North: 71.617356356104°
	South: 27.3841327350936°
	East: 34.7666232192409°
	West: -31.8441144629545°