Land-use and land-cover classification in semi-arid regions using independent component analysis (ICA) and expert classification

被引:9
|
作者
Namdar, Mohammad [1 ]
Adamowski, Jan [2 ]
Saadat, Hossein [2 ]
Sharifi, Forood [3 ]
Khiri, Afsaneh [1 ]
机构
[1] Forest Range & Watershed Management Org, Tehran, Iran
[2] McGill Univ, Dept Bioresource Engn, Ste Anne De Bellevue, PQ H9X 3V9, Canada
[3] Soil Conservat & Watershed Management Res Inst, Tehran, Iran
基金
加拿大自然科学与工程研究理事会; 加拿大创新基金会;
关键词
OBJECT-ORIENTED CLASSIFICATION; LEAF-AREA INDEX; ACCURACY; IKONOS;
D O I
10.1080/01431161.2014.978035
中图分类号
TP7 [遥感技术];
学科分类号
081102 ; 0816 ; 081602 ; 083002 ; 1404 ;
摘要
This study was focused on addressing the need for accurate land-use/land-cover classification (LULC) maps in Iran and in other similarly developing countries. To generate and validate a new LULC map for northeastern Iran's 2037.5 km(2) Hable-roud watershed, a step-by-step process was developed and implemented, consisting of image preprocessing, extraction of training and reference sampling locations, decomposition of multi-spectral thematic mapper bands into features by independent component analysis methods, classification using these features and slope maps, enhancement of land-use classes through image segmentation and zonal statistics, then through consideration of normalized difference vegetation index and climatic zones, followed by ground truthing. This newly developed approach provided maps that distinguished dryland farming, irrigated farmland, forest plantations, and low-, medium-, and high-vegetation density rangelands, while currently available maps for the watershed left 39% of lands unclassified or in combined classes. The new maps' ground-truthing-based overall accuracy and kappa coefficient were 88.3% and 0.83, respectively. In order to develop such an improved LULC map, it was necessary to go beyond the mere analysis of reflectance information, to incorporating climatic and topographic data through this newly proposed step-by-step approach.
引用
收藏
页码:8057 / 8073
页数:17
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