Quality of Height Models Covering Large Areas

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review

Autoren

  • Ali Abdullah Aldosari
  • Karsten Jacobsen

Organisationseinheiten

Externe Organisationen

  • King Saud University
Forschungs-netzwerk anzeigen

Details

OriginalspracheEnglisch
Seiten (von - bis)177-190
Seitenumfang14
FachzeitschriftPFG - Journal of Photogrammetry, Remote Sensing and Geoinformation Science
Jahrgang87
Ausgabenummer4
PublikationsstatusVeröffentlicht - Okt. 2019

Abstract

Qualität von Höhenmodellen von großen Gebieten. Digitale Höhenmodelle sind eine Grundvoraussetzung für viele Anwendungen. Die Erstellung von Höhenmodellen ist zeitaufwändig und damit teuer. Es sind jedoch nahezu weltweite Höhenmodelle frei oder kommerziell verfügbar. Ihre Anzahl und Qualität nimmt zu. Für die praktische Verwendung ist es erforderlich, Informationen über die Qualität zu haben, was sich durch die Genauigkeit, Genauigkeitscharakteristik, Gebiete mit Problemen und die Definition als Oberflächenmodell mit der Höhe der sichtbaren Objekte, oder Geländemodell mit der Höhe des Bodens und der Korrelation benachbarter Höhenwerte beschreiben lässt. Darüber hinaus ist die Homogenität und Verfügbarkeit von Bedeutung. Die morphologischen Details lassen sich durch den Punktabstand und die relative Höhengenauigkeit beschreiben. Es wird ein Überblick über die frei verfügbaren und kommerziellen, nahezu weltweiten Höhenmodelle mit ausreichendem Punktabstand und akzeptabler Genauigkeit gegeben. Die Änderungen in diesem Bereich sind schnell, so dass nur der aktuelle Stand beschrieben werden kann. Ein wirklich weltweites Höhenmodell kam mit dem kommerziellen WorldDEM, das auf dem interferometrischen Radar mit synthetischer Apertur (InSAR) der TanDEM-X-Konfiguration basiert. Zusätzlich zu der höchsten Genauigkeit sind mit Ausnahme der Stadtgebiete die morphologischen Details durch den Punktabstand von 10 m sehr gut. Zusätzliche Qualitätsdateien beschreiben WorldDEM. Die aufgeführten Höhenmodelle wurden mit Referenzhöhenmodellen verglichen, die eine ausreichende Genauigkeit haben. Um die Auswahl geeigneter Höhenmodelle zu erleichtern wird die Charakteristik der Höhenmodelle beschrieben, wie auch die Probleme der Genauigkeitsspezifikationen, verschiedene Genauigkeitsmaße und die Abhängigkeit von der Geländeneigung und anderen Parametern. Dieses enthält auch Informationen über Verschiebungen und manchmal Rotationen der Höhenmodelle, sowie höhergradige systematische Höhenfehler.

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Quality of Height Models Covering Large Areas. / Aldosari, Ali Abdullah; Jacobsen, Karsten.
in: PFG - Journal of Photogrammetry, Remote Sensing and Geoinformation Science, Jahrgang 87, Nr. 4, 10.2019, S. 177-190.

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review

Aldosari, AA & Jacobsen, K 2019, 'Quality of Height Models Covering Large Areas', PFG - Journal of Photogrammetry, Remote Sensing and Geoinformation Science, Jg. 87, Nr. 4, S. 177-190. https://doi.org/10.1007/s41064-019-00072-1
Aldosari, A. A., & Jacobsen, K. (2019). Quality of Height Models Covering Large Areas. PFG - Journal of Photogrammetry, Remote Sensing and Geoinformation Science, 87(4), 177-190. https://doi.org/10.1007/s41064-019-00072-1
Aldosari AA, Jacobsen K. Quality of Height Models Covering Large Areas. PFG - Journal of Photogrammetry, Remote Sensing and Geoinformation Science. 2019 Okt;87(4):177-190. doi: 10.1007/s41064-019-00072-1
Aldosari, Ali Abdullah ; Jacobsen, Karsten. / Quality of Height Models Covering Large Areas. in: PFG - Journal of Photogrammetry, Remote Sensing and Geoinformation Science. 2019 ; Jahrgang 87, Nr. 4. S. 177-190.
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title = "Quality of Height Models Covering Large Areas",
abstract = "Digital height models (DHM) are a basic requirement for several applications. The generation of DHM is time consuming and expensive, but some nearly worldwide covering height models are available free of charge or commercially and the number and quality are growing. For practical use it is important to have some information about the quality, the accuracy, accuracy characteristics, areas with problems, height definition as digital surface model with the height of the visible surface or as digital terrain model with heights of the bare ground, resolution (point spacing and correlation of neighboured height values), homogeneity and availability. Also morphologic details are important, depending upon the point spacing and relative height accuracy. An overview about the freely available and commercially nearly worldwide covering height models with a satisfying point spacing and accuracy is given. Changes in this area are fast, so only the current status can be described. A really worldwide covering DHM came with the commercial WorldDEM, based on TanDEM-X interferometric synthetic aperture radar (InSAR) from which now also a reduced, free version with 3 arcsec point spacing is available as TDM90. In addition to the highest accuracy in this field with 10 m point spacing, WorldDEM has also very good morphologic details with the exception of city areas. Quality files belonging to WorldDEM include information about areas with problems. Some height models have been analysed by comparison with satisfying reference height models. The characteristics are described as well as the problems of accuracy specifications with different accuracy figures and dependency upon terrain inclination and other parameters, to allow a selection corresponding to the individual requirements. This also includes horizontal shifts or even rotations and higher degree systematic differences between the reference and the analysed DHM.",
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