A slope-based weighting method for fusing SRTM and ASTER

doi:10.13474/j.cnki.11-2246.2020.0124

Abstract

Abstract: To produce a high-accuracy public available DEM,a weighted mean method based on terrain slope for fusing SRTM and ASTER is developed in this paper. Specifically, the two public DEMs are first georeferenced. Then, the fusion weights of the two DEMs are calculated with respect to their elevation errors under different slope grades. Finally, the two DEMs are fused based on the fusion weights. The fused DEM is assessed using some high-precision control points. The results indicate that the precision of the fused DEM is improved, whose elevation standard deviation error is 5.65 m and 1.20 m lower than those of SRTM and ASTER, respectively.

Key words: SRTM, ASTER, weighted mean fusion, slope, accuracy

CLC Number:

P208

ZHENG Tingting, CHEN Chuanfa, LIU Hongtao. A slope-based weighting method for fusing SRTM and ASTER[J]. Bulletin of Surveying and Mapping, 2020, 0(4): 121-124.

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