Performance evaluation of different DEMs for topographic correction on LAPAN-A3: preliminary results

Zylshal Zylshal

doi:10.1117/12.2543437

21 November 2019 Performance evaluation of different DEMs for topographic correction on LAPAN-A3: preliminary results

Zylshal Zylshal

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Proceedings Volume 11311, Sixth Geoinformation Science Symposium; 113110K (2019) https://doi.org/10.1117/12.2543437
Event: Sixth Geoinformation Science Symposium, 2019, Yogyakarta, Indonesia

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.

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Zylshal Zylshal "Performance evaluation of different DEMs for topographic correction on LAPAN-A3: preliminary results", Proc. SPIE 11311, Sixth Geoinformation Science Symposium, 113110K (21 November 2019); https://doi.org/10.1117/12.2543437

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