基于多元信息的建筑用地提取方法研究  

Research on Extraction Method of Building Land Based on Multivariate Information

作　　者：王梦涵 闫金凤[1] 高珊珊 徐美荣 张宵宵 WANG Menghan;YAN Jinfeng;GAO Shanshan;XU Meirong;ZHANG Xiaoxiao(College of Geomatics, Shandong University of Science and Technology, Qingdao Shandong 266590, China)

机构地区：[1]山东科技大学测绘科学与工程学院,山东青岛266590

出　　处：《北京测绘》2018年第12期1393-1396,共4页Beijing Surveying and Mapping

摘　　要：针对建筑用地在提取过程中易与大面积裸露耕地和未利用地相混淆,且当前大多建筑用地提取指数阈值难以确定的问题,提出了利用多元信息提取城镇用地和农村居民地的方法。实验结果表明,利用农作物生长、成熟期的不同时相特征可有效削弱大面积的裸露耕地对建筑用地提取精度的影响;构建的裸地弱化建筑指数(Bare Land Weakened Build-Up Index,BWBI)将建筑用地正值化、背景地物负值化,克服了大多数建筑指数阈值难以确定的缺点;利用DMSP/OLS夜间稳定灯光数据构建城镇缓冲区实现了城镇与农村居民地的半自动化提取,其提取精度均达到80%以上。For the problems that the construction land is easy to be confused with a large area of exposed cultivated land and unutilized land in the extraction process and the extraction threshold of most construction lands is difficult to determine,it is proposed to extract urban and rural residential areas using multiple information.The experimental results show that using the different phases of crop growth and maturation can effectively weaken the influence of large-area exposed cultivated on the extraction accuracy of construction land.The proposed bare land weakened build-up index overcomes the disadvantage of the difficulty of determining the threshold of most building land extraction index,it makes positive values for building land and negative values for background features.The use of DMSP/OLS nighttime light data to construct urban buffers to achieve semi-automatic extraction of urban and rural residential areas,the extraction accuracy is more than80%.

关 键 词：建筑用地提取 陆地卫星(Landsat)影像 时相特征 裸地弱化建筑指数 城镇缓冲区 

分 类 号：P237[天文地球—摄影测量与遥感]