ANALYSIS OF CORRECTION METHODS FOR DIGITAL ELEVATION MODELS BASED ON SATELLITE DATA
A. I. Pavlova1, A. V. Pavlov2
1Novosibirsk State University of Economics and Management, ul. Kamenskaya 52, Novosibirsk 630099
2Novosibirsk State Technical University, prosp. K. Marksa 20, Novosibirsk 630073
Keywords: цифровая модель рельефа, глобальные матрицы высот, геоморфометрический анализ, цифровое моделирование рельефа, digital elevation model, global height matrices, geomorphometric analysis, digital terrain modeling
Abstract
Correction algorithm for digital elevation models derived from remote sensing of the Earth's surface are analyzed. The accuracy of the ASTER GDEM2, SRTM X -band, and ALOS DMS global digital elevation models were analyzed, showing that ALOS DMS pictures have the smallest absolute and relative errors for different relief conditions (flat, hilly and heavily dissected plains) of the Novosibirsk region. A comparative analysis of the algorithms proposed by Wang and Liu, Plantchon and Darboux, Pelletier, and Tarboton was performed to eliminate artifacts on original satellite images associated with local topographic lows (depressions, pits). The smallest errors for different terrain conditions were obtained using the algorithm of Wang and Liu.
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