ISPRS-Archives

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences

ISPRS-Archives

Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.

2194-9034

Copernicus Publications

Göttingen, Germany

10.5194/isprs-archives-XLIII-B4-2020-183-2020

UPDATES OF ‘AW3D30’ ALOS GLOBAL DIGITAL SURFACE MODEL WITH OTHER OPEN ACCESS DATASETS

Takaku

¹ Tadono

² Doutsu

¹ Ohgushi

¹ Kai

Remote Sensing Technology Center of Japan, Tokyu REIT Toranomon BLDG 3F, 3-17-1 Minato-ku Tokyo, Japan

Earth Observation Research Center, Japan Aerospace Exploration Agency, 2-1-1 Sengen, Tsukuba, Ibaraki, Japan

24 08 2020

XLIII-B4-2020 183 189

2020

This work is licensed under the Creative Commons Attribution 4.0 International License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/

This article is available from https://isprs-archives.copernicus.org/articles/XLIII-B4-2020/183/2020/isprs-archives-XLIII-B4-2020-183-2020.html

The full text article is available as a PDF file from https://isprs-archives.copernicus.org/articles/XLIII-B4-2020/183/2020/isprs-archives-XLIII-B4-2020-183-2020.pdf

In 2016 we first completed the global data processing of digital surface models (DSMs) by using the whole archives of stereo imageries derived from the Panchromatic Remote sensing Instrument for Stereo Mapping (PRISM) onboard the Advanced Land Observing Satellite (ALOS). The dataset was freely released to the public in 30 m grid spacing as the ‘ALOS World 3D - 30m (AW3D30)’, which was generated from its original version processed in 5 m or 2.5 m grid spacing. The dataset has been updated since then to improve the absolute/relative height accuracies with additional calibrations. However the most significant update that should be applied for improving the data usability is the filling of void areas, which correspond to approx. 10% of global coverage, mostly due to cloud covers. In this paper we introduce the updates of AW3D30 filling the voids with other open-access DSMs such as Shuttle Radar Topography Mission (SRTM) Digital Elevation Model (DEM), Advanced Spaceborne Thermal Emission and Reflection Radiometer Global DEM (ASTER GDEM), ArcticDEM, etc., through inter-comparisons among these datasets.