X. Wang (Japan) and S. Zhang (PRC)
ASTER, evaluation, land cover classification, spectral feature, the Queer Mountains
ASTER satellite data were used to study spectral features and classifications of land cover in the Queer Mountains of western Sichuan Province, China. Ground investigation data allowed the evaluation of quantitative precision and accuracy of spatial distribution. Results indicated that some band combinations of ASTER data are effective in the land cover classification. Classification accuracy of the 14-band combination (Case 1) after geometric correction was more than 83.9%. Comparison of results showed that accuracy of the combinations of Bands 1, 2, 3, 4, 6, 9, 10 and 13 (Case 2), and those of Bands 1, 3, 6, 8, 12 and 14 (Case 3), were 76.6–92.6% and 85.6–97.5% respectively. That of Bands 1, 2, 3, 4, 6 and 9 (Case 4) were not effective on the land cover classification in the mountains. We infer that TIR bands are necessary to classify land cover on mountains with more than 2000 m relative altitude. Spatial distributions of land cover types, roads, residential land, cropland, and rock were easily misinterpreted; rock was also misinterpreted as residential areas or cropland.
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