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<p>Accurate elevation information is essential for geomatics applications, particularly in high-latitude regions where independent validation of available digital elevation models remains limited. In this paper, absolute vertical accuracy was assessed for ArcticDEM v3, ArcticDEM v4, and Copernicus DEM along public road networks in north-western Russia, using <i>in-situ</i> kinematic GNSS measurements as reference. The evaluation was conducted without local DEM registration, relying on the global or wide-area registration of the datasets. ArcticDEM v4 shows the closest agreement with GNSS elevations, while ArcticDEM v3 and Copernicus DEM exhibit larger departures over complex linear structures such as bridges, dykes, and cut sections. The results confirm the suitability of these datasets for applications requiring vertical accuracy of approximately 5 meters without local registration, and highlight the effectiveness of road-based GNSS surveys for DEM validation.</p>

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Absolute vertical accuracy of ArcticDEM and Copernicus DEM across north-western Russia and in-situ GNSS measurements

  • 期刊论文

  • 发表日期：

    2026年2月9日

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  • Igor Aleshin,
  • Kirill Kholodkov,
  • Fedor Perederin,
  • Grigory Steblov,
  • Vitaliy Pogorelov

摘要

Accurate elevation information is essential for geomatics applications, particularly in high-latitude regions where independent validation of available digital elevation models remains limited. In this paper, absolute vertical accuracy was assessed for ArcticDEM v3, ArcticDEM v4, and Copernicus DEM along public road networks in north-western Russia, using in-situ kinematic GNSS measurements as reference. The evaluation was conducted without local DEM registration, relying on the global or wide-area registration of the datasets. ArcticDEM v4 shows the closest agreement with GNSS elevations, while ArcticDEM v3 and Copernicus DEM exhibit larger departures over complex linear structures such as bridges, dykes, and cut sections. The results confirm the suitability of these datasets for applications requiring vertical accuracy of approximately 5 meters without local registration, and highlight the effectiveness of road-based GNSS surveys for DEM validation.