恐龙谷南缘环状构造的土地利用/覆盖分类及高光谱特征差异分析  

Land use / cover classification and hyperspectral characteristics difference analysis of the circular structure in the south of Dinosaur Valley

作　　者：胡琳 甘淑[1,2] 袁希平 高莎 毕瑞 李绕波 李新澳 HU Lin;GAN Shu;YUAN Xiping;GAO Sha;BI Rui;LI Raobo;LI Xinao(School of Land and Resources Engineering,Kunming University of Science and Technology,Kunming 650093,China;Yunnan Institute of Engineering Research and Application of Plateau Mountain Spatial Information Surveying and Mapping Technology,Kunming 650093,China)

机构地区：[1]昆明理工大学国土资源工程学院,云南昆明650093 [2]云南省高校高原山区空间信息测绘技术应用工程研究中心,云南昆明650093

出　　处：《光学技术》2021年第6期709-715,共7页Optical Technique

基　　金：国家自然科学基金(41561083、41861054);云南省自然科学基金资助项目(2015FA016);高分专项省域产业化应用项目(89-Y40G19-9001-18/20)。

摘　　要：山地环状构造能提供丰富的深部地质作用信息,为深化对此特殊地质构造的探索研究,基于GF-5卫星影像,对禄丰恐龙谷南缘的环状构造进行土地利用/覆盖分类,再对分类后的地类进行高光谱特征分析,最后对环状构造内外的同种地类的高光谱特征进行差异分析。得到如下结论:研究区内,未利用地占比最大,约36.14%,主要以环状形式分布,林地次之,约29.03%,草地占比17.80%;对比光谱库数据,6种地类的光谱曲线与相应特征地物的光谱曲线变化特征一致,可知基于面向对象的分类结果具有效性;环状构造内外的同种土地利用/覆盖类型的高光谱曲线整体变化趋势相似,但仍存在差异。环状构造内外的未利用地、林地和草地的反射率差值最大分别为6.61%、4.33%和4.05%,但也存在反射率差值仅为0.01%的波段。通过本文研究结果为建立滇中特殊地质构造的土地利用/覆盖类型的星载高光谱数据库提供理论依据和技术支持,同时也为后续进行基于高光谱技术的深入研究和精细研究提供基础数据。Mountainous circular structures can provide abundant information on deep geological processes.To deepen the exploration and research of this special geological structure,based on the GF-5 satellite image.The circular structure in the south of Lufeng Dinosaur Valley is classified by land use/cover classification and then the hyperspectral characteristic of the classified land tapes is analyzed.Finally,the hyperspectral characteristics of the same land types inside and outside the circular structure are analyzed.The following conclusions are obtained:In the study area,the unused land accounts for the largest proportion(about 36.14%),which is mainly distributed in the circular form;Forest land accounts for 29.03%,and grassland accounts for 17.80% of the total area;Compared with the spectral library data,the spectral curves of the six land types are consistent with those of the corresponding features,indicating that the object-oriented classification results are effective;The overall trend of hyperspectral curves of the same land use/cover types inside and outside the circular structure is similar,but there are still differences.The maximum reflectance difference of unused land,woodland and grassland inside and outside the circular structure is 6.61%,4.33% and 4.05%,respectively,but there are bands with only 0.01%reflectance difference.The results provide a theoretical basis and technical support for the establishment of a spaceborne hyperspectral database of land use/cover types of special geological structures in central Yunnan and also provide basic data for further and fine research based on hyperspectral technology.

关 键 词：环状构造 禄丰恐龙谷 土地利用/覆盖分类 高光谱特征 特征差异分析 

分 类 号：P236[天文地球—摄影测量与遥感]