Paper Info
Title
Topographic Correction of ZY-3 Satellite Images and Its Effects on Estimation of Shrub Leaf Biomass in Mountainous Areas
Abstract
The availability of ZY-3 satellite data provides additional potential for surveying, mapping, and quantitative studies. Topographic correction, which eliminates the terrain effect caused by the topographic relief, is one of the fundamental steps in data preprocessing for quantitative analysis of vegetation. In this paper, we rectified ZY-3 satellite data using five commonly used topographic correction models and investigate their impact on the regression estimation of shrub forest leaf biomass obtained from sample plots in the study area. All the corrections were assessed by means of: (1) visual inspection (2) reduction of the standard deviation (SD) at different terrain slopes (3) correlation analysis of different correction results. Best results were obtained from the Minnaert+SCS correction, based on the non-Lambertian reflection assumption. Additional analysis showed that the coefficient correlation of the biomass fitting result was improved after the Minnaert+SCS correction, as well as the fitting precision. The R-2 has increased by 0.113 to reach 0.869, while the SD (standard deviation) of the biomass dropped by 21.2%. Therefore, based on the facts, we conclude that in the region with large topographic relief, the topographical correction is essential to the estimation of the biomass.
Year
DOI
Venue
2014
10.3390/rs6042745
REMOTE SENSING
Keywords
Field
DocType
topographical correction,non-lambertian reflection models,ZY-3 satellite,biomass,remote sensing estimation
Vegetation,Visual inspection,Satellite,Regression,Topographic map,Shrub,Remote sensing,Terrain,Geology,Standard deviation
Journal
Volume
Issue
Citations 
6
4
6
PageRank 
References 
Authors
0.54
6
6
Name
Order
Citations
PageRank
mingliang gao160.54
Wenji Zhao22517.51
Zhaoning Gong3167.00
Huili Gong48829.37
zheng chen560.54
xinming tang660.54