On the vertical accuracy of the ALOS world 3D-30m digital elevation model
| Autor: | Kazimierz Becek, Caglar Bayik, Cetin Mekik, Mustafa Özendi |
|---|---|
| Přispěvatelé: | Zonguldak Bülent Ecevit Üniversitesi |
| Rok vydání: | 2018 |
| Předmět: |
010504 meteorology & atmospheric sciences
0211 other engineering and technologies geoinformatics 02 engineering and technology Geodesy 01 natural sciences Geography Earth and Planetary Sciences (miscellaneous) Satellite Runway Electrical and Electronic Engineering Digital elevation model Geology 021101 geological & geomatics engineering 0105 earth and related environmental sciences Remote sensing |
| Zdroj: | Remote Sensing Letters. 9:607-615 |
| ISSN: | 2150-7058 2150-704X |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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