GDEMM2024: Global Digital Elevation Merged Model 2024 for surface, bedrock, ice thickness, and land-type masks

Various research topics in geosciences such as gravity modelling, terrain correction and ocean circulation, require high resolution and accuracy global elevations for land topography, bathymetry, and ice thickness that refer to a consistent vertical datum. Unfortunately, most of the existing DEMs do...

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Bibliographic Details
Published in:Scientific data 2024-10, Vol.11 (1), p.1087-12, Article 1087
Main Authors: Ince, E. Sinem, Abrykosov, Oleh, Förste, Christoph
Format: Article
Language:English
Subjects:
704/2151/213/536
704/2151/2809
Accuracy
Airborne radar
Bathymetry
Data Descriptor
Datasets
Gravity
Humanities and Social Sciences
Ice
Lakes
Liquor
Masks
multidisciplinary
Oceans
Science
Science (multidisciplinary)
Topography
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Summary:Various research topics in geosciences such as gravity modelling, terrain correction and ocean circulation, require high resolution and accuracy global elevations for land topography, bathymetry, and ice thickness that refer to a consistent vertical datum. Unfortunately, most of the existing DEMs do not provide such solutions for Earth relief layers with the same resolution globally. To overcome this deficiency, we merged various DEMs published in the recent years and compiled an up-to-date global solution. We provide 30 arcsecond grid suite for relief layers and land-type masks which have been substantially improved w.r.t. the grids in literature. The quality of the merged surface elevation is assessed against the GNSS heights at about globally distributed 22000 stations. The merged surface model shows a reduction in standard deviation of a factor of three compared to other commonly used DEMs. Other evaluations are performed over land-ice and oceans which supports the advancement of GDEMM2024. The improvements are due to the accuracy and coverage of the original input data, updated land-type masks and merging methodology.
ISSN:2052-4463
2052-4463
DOI:10.1038/s41597-024-03920-x