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土壤流失量遥感监测中GIS像元地形因子算法的研究 预览 被引量:28

ALGORITHM OF TERRAIN FACTORS OF GIS PIXIL IN MONITORING SOIL LOSS BY REMOTE SENSING
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摘要 GIS橡元地形因子的算法,是土壤流失量遥感监测中的关键技术。对于其算法原理,应用程序,应用结果和应用精度,本文作了介绍和讨论。经实际应用表明,GIS像元地形因子算法虽比图斑地形因子算法的运算量大和较复杂,但它有较严密可靠,较高的应用精度和较好的自动 化程度。因像元坡长几乎相等而忽视或视像元坡长因子为相同的常数,都将导致流失量监测的重大错误。 Algorithm of terrain factors of GIS pixel is the key technique in monitoring so- il loss by remote sensing.The principle, the applied process and the applied resultsof this algolithm are introduced and its applied accuracy is discuced in this article. Although the algorithm of terrain factors of GIS pixel is more complicated,and itscalculation is more complicated than that of contour terrain factors,it is more depe- ndable,automatic and of a higher accuracy than the latter algorithm. Neglecting theslope-length factor of pixel or regarding it as t be same constant value due tosimilar slope lengths of pixels would lead to bad mistakes in the soil loss moni- toring.
作者 卜兆宏 唐万龙 Bu Zhaohong;Tang Wanlong and Pan Xianzhang(Institute of Soil Scicnce,Academia Sinica,Nanjing,210008)
出处 《土壤学报》 CAS CSCD 北大核心 1994年第3期 322-329,共8页 Acta Pedologica Sinica
基金 国家自然科学基金
关键词 土壤流失量 像元地形因子 Soil loss,Terrain factor of pixel,Slope.length factorThe Project Supported by National Natural Science Foundation of Chna.
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