南昌地区不透水面遥感估算研究  

Remote Sensing Estimation of Impervious Surface in Nanchang Area

作　　者：赵晨 聂运菊[1] 汪博军 李永飞 ZHAO Chen;NIE Yun-ju;WANG Bo-jun(Faculty of Geomatics,East China University of Technology,Nanchang,Jiangxi 330013)

机构地区：[1]东华理工大学测绘工程学院

出　　处：《安徽农业科学》2019年第14期63-66,141,共5页Journal of Anhui Agricultural Sciences

基　　金：江西省数字国土重点实验项目(DLLJ201812);国家自然科学基金(41602258)

摘　　要：基于亚像元思想,采用线性光谱混合模型对混合像元进行分解,结合传统与手动方法选取端元,使用Landsat8OLI数据对研究区不透水面覆盖度(Impervious Surface Coverage,ISC)进行提取,并对初步提取的不透水面采用NDVI阈值法进行优化处理。对于模型的分解精度,RMS平均值为0.008812,达到精度要求。提取结果经精度验证,提取的不透水面盖度的均方根误差为0.1398,平均绝对误差为0.0809,具有较高的精度。最后,对南昌部分地区进行不透水面盖度统计,并对其进行空间分布分析。研究结果表明:使用线性光谱混合模型并结合传统与手动选取端元,能够较好的提取南昌地区不透水面盖度信息,可以解决仅仅基于像元的不透水面提取精度不高的问题;南昌地区不透水面主要集中在研究区的中部地区,四周不透水面盖度较低,平均不透水面盖度最高的地区为青云谱区,平均ISC达到59%。Based on the sub-pixel idea,this paper used linear spectral mixture model to decompose the mixed pixels,which combined the traditional and manual methods to select the endmembers.The landsat 8 operational land imager data was used to extract the impervious surface coverage of the study area and the NDVI threshold method was used to optimize the impervious surface of the initial extraction.For the decomposition accuracy of this paper,the RMS average was 0.008 812,which met the accuracy requirements.The extraction result was verified by accuracy,and the root mean square error of the extracted impervious surface coverage was 0.139 8,and the average absolute error was 0.080 9,which had high precision.Finally,the impervious surface coverage statistics of some areas in Nanchang was conducted and the spatial distribution was analyzed.The results showed that the linear spectral mixiture model combined with traditional and manual selection of endmembers could better extract the coverage of the impervious surface in Nanchang area,which can solve the problem of low precision of impervious surface extraction based on only pixels;the impervious surface of Nanchang area was mainly concentrated in the central part of the study area.The area with impervious surface coverage was lower,and the area with the highest average impervious surface coverage was Qingyunpu area,with an average ISC of 59%.

关 键 词：不透水面 线性光谱混合模型 端元 遥感 

分 类 号：P237[天文地球—摄影测量与遥感]