Version 1
: Received: 24 August 2017 / Approved: 24 August 2017 / Online: 24 August 2017 (15:51:17 CEST)
How to cite:
Bayık, Ç.; Becek, K.; Mekik, Ç.; Özendi, M. On the Vertical Accuracy of the ALOS World 3D-30m Digital Elevation Model. Preprints2017, 2017080081. https://doi.org/10.20944/preprints201708.0081.v1
Bayık, Ç.; Becek, K.; Mekik, Ç.; Özendi, M. On the Vertical Accuracy of the ALOS World 3D-30m Digital Elevation Model. Preprints 2017, 2017080081. https://doi.org/10.20944/preprints201708.0081.v1
Bayık, Ç.; Becek, K.; Mekik, Ç.; Özendi, M. On the Vertical Accuracy of the ALOS World 3D-30m Digital Elevation Model. Preprints2017, 2017080081. https://doi.org/10.20944/preprints201708.0081.v1
APA Style
Bayık, Ç., Becek, K., Mekik, Ç., & Özendi, M. (2017). On the Vertical Accuracy of the ALOS World 3D-30m Digital Elevation Model. Preprints. https://doi.org/10.20944/preprints201708.0081.v1
Chicago/Turabian Style
Bayık, Ç., Çetin Mekik and Mustafa Özendi. 2017 "On the Vertical Accuracy of the ALOS World 3D-30m Digital Elevation Model" Preprints. https://doi.org/10.20944/preprints201708.0081.v1
Abstract
The digital elevation model (DEM) is one of the key geospatial datasets used in many fields of engineering and science for countless applications. In this contribution, we assess the vertical accuracy of the Advanced Land Observing Satellite (ALOS) World 3D-30m (AW3D30) DEM using the runway method (RWYM). The RWYM utilizes the longitudinal profiles of runways which are reliable and ubiquitous reference data. A reference dataset used in this project consists of 36 runways located at various points throughout the world. The same dataset was previously used to test the accuracy of WorldDEMTM. Our study indicates that AW3D30 has a remarkably high RMSE of 1.78 m (one σ). However, while analyzing the results, it has become apparent that it also contains a widespread elevation anomaly. We conclude that this anomaly is the result of uncompensated sensor noise and the data processing algorithm (downsampling of the higher resolution data). We believe that this issue should be communicated to the user community. Also, we would like to note that the traditional accuracy assessment of a DEM, e.g., statistical assessment of the elevation differences = model – reference, does not allow for identification of these type of anomalies in a DEM.
Keywords
AW3D30; DEM; Runway Method; RWYM
Subject
Environmental and Earth Sciences, Remote Sensing
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
