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ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2020, Vol. 17, No. 7, pp. 117-127

Analysis of the applicability of the ASTER GDEM v2 and ArcticDEM digital elevation models in research on Russia’s Arctic territories

E.V. Polyakova 1 , Yu.G. Kutinov 1, 2 , A.L. Mineev 1 , Z.B. Chistova 1 
1 N.P. Laverov Federal Center for Integrated Arctic Research RAS, Arkhangelsk, Russia
2 Space Monitoring Center of the Arctic NARFU, Arkhangelsk, Russia
Accepted: 22.10.2020
DOI: 10.21046/2070-7401-2020-17-7-117-127
Materials from various satellite imagery from artificial Earth satellites are widely used in world practice when studying the state of the environment. The main and modern way of representing the shape of the Earth’s surface is a digital elevation model (DEM). Global DEMs cover the entire or almost the entire territory of the Earth. Currently, there is a need to create a DEM of the bottom of the Arctic Ocean and adjacent seas. Typically, 2 digital models are used for bathymetry: GEBCO and IBCAO in various versions. To assess the transfer of matter and the formation of underwater relief, it is necessary to create a single DEM of the ocean floor and adjacent land (watershed of the Arctic Ocean). For land areas, ASTER GDEM v2 and ArcticDEM are the most suitable DEMs. ArcticDEM is highly accurate (2 m). ArcticDEM data cover the entire area north of 60° N, but do not completely cover the catchment area of the Arctic Ocean. As with any other global DEM, it has areas of missing data. The largest territories with missing data are: Saint Petersburg and the Leningrad Region (20.19 %), the Republic of Karelia (17.13 %), Vologda (14.96 %), Arkhangelsk (11.48 %) and Kirov (8.7 %) Regions. Such gaps should be filled using: data of other models, such as ASTER GDEM v2; elevations of geodetic signs and data from topographic maps with mandatory artificial reduction of the cell size to the original ArcticDEM resolution. ASTER GDEM v2 and ArcticDEM are applicable to different tasks: the former to highlight regional trends in the development of topography and regional morphostructures; the latter to local analysis of slightly indented forms of relief.
Keywords: digital elevation model, ArcticDEM, ASTER GDEM, Russia’s subjects
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