{"id":"917b94ac-25e1-4eb0-a0b9-32525acd9342","title":"黑河综合遥感联合试验：大野口关滩森林站超级样地地表粗糙度观测数据集","title_en":"WATER: Dataset of surface roughness at the super site around the Dayekou Guantan forest station","serial":"黑河综合遥感联合试验","user_limit":"本数据由“黑河综合遥感联合试验”产生，用户在使用数据时请在正文中明确声明数据的来源，并在参考文献部分引用本元数据提供的引用方式。","instructions":null,"description":"本数据来自大野口流域关滩森林站超级样地，该超级样地乔木植被为青海云杉纯林，样地大小为100m×100m。 \n该数据应用中科院寒旱所自制的粗糙度测量板和数码相机，在整个超级样地内选取了41个格网点，其中有25个角点和16个中心点（代表16个超级样地的子样方），每个位置观测2次，并拍照。每个采样点均按照南北向和东西向分别测量1次，粗糙度板长110cm，测量点间距1cm。\n本数据可为发展和验证微波遥感算法提供基本的地面数据集。b包括原始照片，及表面高度标准离差（cm）和表面相关长度（cm）的计算结果。\n相片处理是在ArcView软件下，对照片中每根辐条的顶端以及板子的四角做手工数字化采样，获得其图像坐标值，经过几何校正后，计算得到每根辐条的高度，然后按公式计算表面高度标准离差和表面相关长度。其计算公式见《微波遥感》第二卷234-236页。\n粗糙度数据中首先是样点名称，之后数据正文包括4列（编号、文件名、标准离差、相关长度）。每一个文件名，即txt文件对应一张采样照片，标准离差（cm）与相关长度（cm）即代表了粗糙度。之后是每张照片中101根辐条的长度，属于中间结果，用以检查校正。","doi":"10.3972/water973.0049.db","projection":"4326","language":"zh","share_type":"offline","east":100.251297,"west":100.250212,"south":38.533171,"north":38.534361,"scale":null,"crs":null,"filesize":113.8,"share_policy":"b","ts_created":"2013-09-14T12:16:47+08:00","doi_type":null,"ts_updated":"2021-04-19T18:42:07.241518+08:00","time_description":null,"datas_group":0,"time_description_en":null,"data_format":"","project":[10,11,15],"specials":["1b7ac22c-43ea-410c-b729-29786f35d16f","1e67029e-f3fe-4aa1-a183-441c82f5c93d","6740cd00-6d20-4855-a39b-863af216b0a2","4e7b97a6-ee1f-4b51-83e5-04a100993973"],"cite":"车涛, 白云洁, 曹永攀, 陈玲. 黑河综合遥感联合试验：大野口关滩森林站超级样地地表粗糙度观测数据集. 中国科学院寒区旱区环境与工程研究所; 北京师范大学. 2008. doi:10.3972/water973.0049.db [Che Tao, Bai Yunjie, Cao Yongpan, Chen Ling. WATER: Dataset of surface roughness at the super site around the Dayekou Guantan forest station. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences; Beijing Normal University. 2008. doi:10.3972/water973.0049.db]","review_status":5,"review_invite":[],"review_editor":null,"data_sources":null,"temporal_resolution":null,"spatial_resolution":null,"license":null,"fund":[35,36],"subtopics":{"metadata":"917b94ac-25e1-4eb0-a0b9-32525acd9342","three_pole":null,"third_pole":null},"username":"车涛","review_time":null,"protected_duration":6,"protected_describe":null,"is_important":false,"hit_count":13574}