【摘要】：地表異質性廣泛存在于陸地表面各個尺度,是地表參數遙感反演不確定性的主要來源之一�；诟叻直媛实乇矸诸悈⒖紙D,提取出低分辨率混合像元的端元數量和邊界長度指標來描述地表異質性。然后以中國地區(qū)為例,使用全國30 m空間分辨率Global Land 30地表分類數據集提取出1 km尺度像元的描述混合結構和破碎程度的異質性指標。并基于提取出的異質性指標分析了中國區(qū)域在1 km尺度上非均質地表地物類型的組合特征、斑塊特征和不同生態(tài)群系內部異質性特征。發(fā)現山地和生態(tài)交錯區(qū)是主要的高異質性區(qū)域,稀樹草原生物群系內部異質性最大(平均邊界長度為7 426 m),其次依次為森林(4 323 m)、耕地/草地(3 160 m)和灌叢(1 779 m)。
[Abstract]:Surface heterogeneity is widely found in all scales of land surface and is one of the main sources of uncertainty in remote sensing inversion of land surface parameters. Based on the high resolution surface classification reference map, the end element number and boundary length index of low resolution mixed pixels are extracted to describe the surface heterogeneity. Then, taking China region as an example, the heterogeneity index of 1 km scale pixel describing mixed structure and fragmentation degree is extracted by using the national 30 m spatial resolution Global Land 30 surface classification data set. Based on the extracted heterogeneity indexes, the composition characteristics, patch characteristics and internal heterogeneity characteristics of different ecological groups in China were analyzed on the scale of 1 km. It is found that the mountain and ecological intersections are the main regions with high heterogeneity, and the inner heterogeneity of the savanna biota is the largest (the average boundary length is 7 426 m), followed by the forest (4 323 m),). Arable land / grassland (3,160m) and thickets (1,779 m).)
【作者單位】： 中國科學院遙感與數字地球研究所遙感科學國家重點實驗室;中國科學院大學資源與環(huán)境學院;全球變化研究協(xié)同創(chuàng)新中心;
【基金】：國家自然科學基金項目“非均質混合像元遙感反射波譜模型構建及葉面積指數反演方法研究”(編號:41271366) 國家重點基礎研究發(fā)展計劃項目“復雜地表遙感信息動態(tài)分析與建�！�(編號:2013CB733401)資助~~
【分類號】：P237

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1 劉豐;郭建文;;結構化地物的異質性分析及其計算方法[J];遙感技術與應用;2014年01期

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