發(fā)布時(shí)間：2019-08-01 06:41

【摘要】：地形復(fù)雜度指標(biāo)是數(shù)字地形分析中重要的參數(shù)。地形復(fù)雜度的定量表達(dá)能夠?yàn)榈匦翁卣鞑蓸永碚�、�?shù)字地形分析(Digital terrain analysis,DTA)的不確定性分析、水文分析等方面提供重要依據(jù)。本文基于多因素地形因子指標(biāo),采用主成分分析方法構(gòu)建一個(gè)自適應(yīng)定權(quán)地形復(fù)雜度模型,以實(shí)現(xiàn)地形特征的綜合描述:選取坡度(Slope,S)、全曲率(Total Curvature,Cur)、地形起伏度(Relief,Rel)和地形粗糙度(Rough,Rou)四個(gè)單一地形因子指標(biāo)構(gòu)建綜合地形復(fù)雜度指標(biāo)(Integrated terrain complexity index,ITCI,后文簡(jiǎn)稱C);通過(guò)實(shí)驗(yàn)訓(xùn)練數(shù)據(jù)實(shí)現(xiàn)地形復(fù)雜度指標(biāo)的解算,得到C與S、Cur、Rel、Rou之間的經(jīng)驗(yàn)公式;根據(jù)經(jīng)驗(yàn)公式計(jì)算實(shí)驗(yàn)區(qū)域的地形復(fù)雜度指標(biāo)值,并結(jié)合實(shí)驗(yàn)區(qū)域的地形類型,得到地形復(fù)雜度指標(biāo)值與地形類型之間的對(duì)應(yīng)關(guān)系;選取了平原、丘陵和山區(qū)三個(gè)實(shí)驗(yàn)區(qū)域,計(jì)算C值對(duì)其對(duì)應(yīng)關(guān)系進(jìn)行驗(yàn)證。實(shí)驗(yàn)結(jié)果表明,本文構(gòu)建的地形復(fù)雜度指標(biāo)與地形特征之間的對(duì)應(yīng)關(guān)系是合理的,能夠有效描述地形特征。本文研究對(duì)于地形特征采樣理論和DTA的不確定性分析等方面具有重要的參考價(jià)值和應(yīng)用價(jià)值。
[Abstract]:Terrain complexity index is an important parameter in digital terrain analysis. The quantitative expression of terrain complexity can provide an important basis for the uncertainty analysis and hydrological analysis of terrain feature sampling theory, digital terrain analysis (Digital terrain analysis,DTA). In this paper, based on the multi-factor terrain factor index, an adaptive weighted terrain complexity model is constructed by principal component analysis (PCA) to realize the comprehensive description of terrain features. Four single terrain factor indexes, slope (Slope,S), full curvature (Total Curvature,Cur), terrain fluctuation (Relief,Rel) and terrain roughness (Rough,Rou), are selected to construct the comprehensive terrain complexity index (Integrated terrain complexity index,ITCI,. The calculation of terrain complexity index is realized by experimental training data, and the empirical formula between C and S, Curr, Rou and Rou is obtained. according to the empirical formula, the terrain complexity index value of the experimental area is calculated, and the corresponding relationship between the terrain complexity index value and the terrain type is obtained according to the terrain type of the experimental area. The corresponding relationship between the terrain complexity index value and the terrain type is obtained by selecting three experimental areas of plain, hill and mountain area, and the corresponding relationship is verified by calculating the C value. The experimental results show that the corresponding relationship between the terrain complexity index and the terrain features is reasonable and can effectively describe the terrain features. This paper has important reference value and application value for terrain feature sampling theory and uncertainty analysis of DTA.
【作者單位】： 西南交通大學(xué)地球科學(xué)與環(huán)境工程學(xué)院;西南交通大學(xué)高速鐵路運(yùn)營(yíng)安全空間信息技術(shù)國(guó)家地方聯(lián)合工程實(shí)驗(yàn)室;
【基金】：測(cè)繪地理信息公益性行業(yè)科研專項(xiàng)項(xiàng)目(201512028) 中央高校基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金(2682014CX017) 西南交通大學(xué)研究生創(chuàng)新實(shí)驗(yàn)實(shí)踐項(xiàng)目(YC201514103)~~
【分類號(hào)】：P208

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