German and European Ground Motion Service: a Comparison

IF 2.1 4区 地球科学 Q3 IMAGING SCIENCE & PHOTOGRAPHIC TECHNOLOGY PFG-Journal of Photogrammetry Remote Sensing and Geoinformation Science Pub Date : 2024-02-27 DOI:10.1007/s41064-024-00273-3
Markus Even, Malte Westerhaus, Hansjörg Kutterer
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Abstract

Since the end of 2022, two ground motion services that cover the complete area of Germany are available as web services: the German Ground Motion Service (Bodenbewegungsdienst Deutschland, BBD) provided by the Federal Institute for Geosciences and Natural Resources (BGR), and the first release of the European Ground Motion Service (EGMS) as part of the Copernicus Land Monitoring Service. Both services are based on InSAR displacement estimations generated from Sentinel‑1 data. It would seem relevant to compare the products of the two services against one another, assess the data coverage they provide, and investigate how well they perform compared to other geodetic techniques. For a study commissioned by the surveying authority of the state of Baden-Württemberg (Landesamt für Geoinformation und Landentwicklung Baden-Württemberg, LGL), BBD and EGMS data from different locations in Baden-Württemberg, Saarland, and North Rhine-Westphalia (NRW) were investigated and validated against levelling and GNSS data. We found that both services provide good data quality. BBD shows slightly better calibration precision than EGMS. The coverage provided by EGMS is better than that of BBD on motorways, federal roads, and train tracks of the Deutsche Bahn. As an example, where both services have difficulties in determining the correct displacements, as they cannot be described well by the displacement models used for processing, we present the test case of the cavern field at Epe (NRW). Finally, we discuss the implications of our findings for the use of the products of BBD and EGMS for monitoring tasks.

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德国和欧洲地动服务:比较
自 2022 年底起,覆盖德国全部地区的两项地动服务可作为网络服务使用:联邦地球科学及自然资源研究所(BGR)提供的德国地动服务(Bodenbewegungsdienst Deutschland, BBD),以及哥白尼陆地监测服务(Copernicus Land Monitoring Service)的欧洲地动服务(EGMS)的首次发布。这两项服务都是基于哨兵 1 号数据生成的 InSAR 位移估算。似乎有必要对这两项服务的产品进行比较,评估它们提供的数据覆盖范围,并调查它们与其他大地测量技术相比的性能如何。在巴登符腾堡州测量局(LGL)委托进行的一项研究中,对来自巴登符腾堡州、萨尔州和北莱茵-威斯特法伦州(NRW)不同地点的 BBD 和 EGMS 数据进行了调查,并与水准测量和 GNSS 数据进行了验证。我们发现,两种服务都提供了良好的数据质量。BBD 的校准精度略高于 EGMS。在德国铁路的高速公路、联邦公路和火车轨道上,EGMS 提供的覆盖范围要优于 BBD。例如,由于处理过程中使用的位移模型无法很好地描述位移,因此两种服务在确定正确的位移方面都存在困难。最后,我们讨论了我们的研究结果对使用 BBD 和 EGMS 产品执行监测任务的影响。
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来源期刊
CiteScore
8.20
自引率
2.40%
发文量
38
期刊介绍: PFG is an international scholarly journal covering the progress and application of photogrammetric methods, remote sensing technology and the interconnected field of geoinformation science. It places special editorial emphasis on the communication of new methodologies in data acquisition and new approaches to optimized processing and interpretation of all types of data which were acquired by photogrammetric methods, remote sensing, image processing and the computer-aided interpretation of such data in general. The journal hence addresses both researchers and students of these disciplines at academic institutions and universities as well as the downstream users in both the private sector and public administration. Founded in 1926 under the former name Bildmessung und Luftbildwesen, PFG is worldwide the oldest journal on photogrammetry. It is the official journal of the German Society for Photogrammetry, Remote Sensing and Geoinformation (DGPF).
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