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On the vertical accuracy of the ALOS world 3D-30m digital elevation model

Caglar B. | Becek K. | Mekik C. | Ozendi M.

Article | 2018 | Remote Sensing Letters9 ( 6 ) , pp.607 - 615

In this contribution, we assess the vertical accuracy of the Advanced Land Observing Satellite (ALOS) World 3D 30 m (AW3D30) digital elevation model (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. We found that AW3D30 has a remarkably low root mean square error (RMSE) of 1.78 m (one sigma). However, while analysing the results, it has become apparent that it also contains a widespread elevation anomaly. We conclude that this anom . . .aly is the result of uncompensated sensor noise and the data processing algorithm. Also, we note that the traditional accuracy assessment of a DEM does not allow for identification of these type of anomalies in a DEM. © 2018 Informa UK Limited, trading as Taylor & Francis Group Daha fazlası Daha az

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