Open AccessEffect of noises removal and spatial resolutions of Digital Surface Model (DSM) in flood inundation model
Author(s) -
Anastasia Yunika,
Matthijs Kok,
J.G. De Gijt,
J Huizinga,
Segel Ginting
Publication year - 2019
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/615/1/012060
Subject(s) - shuttle radar topography mission , digital elevation model , flood myth , geospatial analysis , remote sensing , advanced spaceborne thermal emission and reflection radiometer , elevation (ballistics) , environmental science , digital surface , computer science , workflow , geology , geography , database , engineering , lidar , archaeology , structural engineering
Digital Elevation Model (DEM) is an important component in flood inundation modelling as a part of flood risk analysis. However, Digital Surface Model (DSM) which still contains noises of artefacts is more common to be available than DEM. Then DSM misleads the inundation extent. This study will evaluate a measure to obtain a bare-earth surface (DEM) by developing and applying a workflow to remove the noises from DSM using simple tools available in the GIS computer software. The output of the method will then be used as input for flood inundation modelling of Semarang City in Indonesia. In addition to the main data set of TerraSAR-X DSM provided by Indonesia Geospatial Information Agency ( Badan Informasi Geospasial or BIG ), two sets of open source digital elevation data from Shuttle Radar Topography Mission (SRTM) and Advanced Spaceborne Thermal Emission (ASTER) are included in this study. The three data sets are processed and quantitatively compared. The results show that the applied noise removal method must be traded off with the lower resolution. Hence, the level of detail of particular flood inundation modelling will determine the required DEM resolution. Different study purposes will lead to different appropriate DEM resolutions to be used.