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Proceedings Paper • Open Access

Performance evaluation of different DEMs for topographic correction on LAPAN-A3: preliminary results
Author(s): Zylshal Zylshal

Paper Abstract

Topographic correction over mountainous region is an essential preprocessing steps for landuse/landcover extraction from earth observation (EO) satellite data. Until the time of this paper writing, there has not been any publication regarding topographic correction on LAPAN-A3 multispectral data. Topographic correction mainly grouped into two categories: band ratio, and illumination modelling which required ancillary digital elevation model (DEM). This paper aim to evaluate three different DEM source used for topographic correction on LAPAN-A3. These DEMs are Shuttle Radar Topographic Mission (SRTM), ALOS World 3D (AW3D), and nation-wide DEMNAS. The topographic corrections were performed over a subset of forested mountainous region in South Sulawesi, Indonesia. Minnaert correction algorithm was used in all three DEMs and evaluate the results. Performance evaluation were based on visual assessment, as well as spectral homogeneity of the pixel value before and after correction. The spectral homogeneity were calculated based on coefficient variation changes before and after correction. The initial results showed that SRTM produced the best visual appearance, while DEMNAS performed the best in terms of highest reduction in coefficient variation.

Paper Details

Date Published: 21 November 2019
PDF: 9 pages
Proc. SPIE 11311, Sixth Geoinformation Science Symposium, 113110K (21 November 2019); doi: 10.1117/12.2543437
Show Author Affiliations
Zylshal Zylshal, LAPAN (Indonesia)

Published in SPIE Proceedings Vol. 11311:
Sixth Geoinformation Science Symposium
Sandy Budi Wibowo; Andi B. Rimba; Stuart Phinn; Ammar A. Aziz; Josaphat Tetuko Sri Sumantyo; Hasti Widyasamratri; Sanjiwana Arjasakusuma, Editor(s)

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