{"id":"e2e66075-b2fb-457c-b681-83810d3495d4","title":"祁连山综合观测网：兰州大学寒旱区科学观测网络CARN（瓜州站物候相机观测数据集-2020）","title_en":"Cold and arid research network of Lanzhou university (phenology camera observation data set of Guazhou Station, 2020)","serial":"","user_limit":"为尊重知识产权、保障数据作者的权益、扩展数据中心的服务、评估数据的应用潜力，请数据使用者在使用数据所产生的研究成果中（包括公开发表的论文、论著、数据产品和未公开发表的研究报告、数据产品等成果），明确注明数据来源和数据作者。对于转载（二次或多次发布）的数据，作者还须注明原始数据来源。","instructions":"年份+**观测网+站点名称+物候数据","description":"该数据集包含2020年3月10日至2020年12月31日疏勒河流域兰州大学寒旱区科学观测网络瓜州站的物候相机观测数据，观测点的经纬度是95.673E，41.405N，海拔2014m。该数据使用北京师范大学自主研发的软件包进行处理。该物候相机采用向下的方式采集数据，拍摄数据分辨率为2592*1944，可指定拍摄时间频率。对于绿度指数物候期计算，需要根据感兴趣区域计算相对绿度指数（GCC, Green Chromatic Coordinate公式为GCC=G/(R+G+B), R、G、B为图像红、绿、蓝三通道像元值），然后进行无效值填充和滤波平滑，最后根据生长曲线拟合确定关键物候期参数，如生长季起始日、顶峰、生长季结束日等；对于覆盖度，首先进行数据预处理，选择光照不太强的图像，然后将图像分割为植被和土壤，计算每张图像的植被像素占计算区域内的比例作为该图像对应的覆盖度，在时间序列数据提取完成以后，再按用户指定的时间窗口对原始覆盖度数据进行平滑滤波，滤波后的得结果为最终的时间序列覆盖度。本数据集包括相对绿度指数（GCC）。3月10日之前的数据由于存储卡到达上限已覆盖；5月31日调整摄像头方位。","doi":"10.11888/Ecolo.tpdc.271609","projection":"","language":"zh","share_type":"online","east":95.673,"west":95.673,"south":41.405,"north":41.405,"scale":null,"crs":null,"filesize":0.01,"share_policy":"a","ts_created":"2021-07-06T10:25:00.231236+08:00","doi_type":"拥有自主知识产权","ts_updated":"2021-07-16T12:24:10.730321+08:00","time_description":"","datas_group":3,"time_description_en":"","data_format":null,"project":[11],"specials":["4e7b97a6-ee1f-4b51-83e5-04a100993973","836a1603-47d0-494e-88c1-96723fd8e0bc","1a73bfb4-68e2-494d-a011-468c4a8bfbe6","f2a78cde-1c98-4241-94dc-7532eba32b80"],"cite":null,"review_status":5,"review_invite":[{"user_name":"冯敏","username":"mfeng","email":"mfeng@itpcas.ac.cn","is_cancel_expert":false}],"review_editor":{"id":66424,"last_login":"2021-08-31T17:09:37.293773+08:00","username":"YanHou","email":"ljz2hy@163.com","is_active":false,"is_staff":false,"user_name":"侯燕"},"data_sources":null,"temporal_resolution":"Daily","spatial_resolution":"-","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[6],"subtopics":{"metadata":"e2e66075-b2fb-457c-b681-83810d3495d4","three_pole":null,"third_pole":"XDA20100101"},"username":"XDA20100101","review_time":null,"protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":708}