本数据集针对格拉丹东峰地区，利用地形图DEM、SRTM（2000）与遥感影像提取的DEM，通过差值计算，获取冰川作用中心冰川表面高程变化。只针对1968-2013年格拉丹东峰地区冰川表面高程变化，故不进行补充和完善，采用完全开放共享。数据集包含ElevationChange1968-2000和ElevationChange2000-2013，共2个波段。字段度量单位：米（m）。数据集主要为遥感影像提取资料，仅表示遥感影像获取时间的冰川表面高程变化，时间为1968-2000和2000-2013两期。
", "ds_source": "本数据集主要为解译数据，数据主要来源为地形图DEM、SRTM（2000）与遥感影像提取的DEM。
", "ds_process_way": "利用地形图DEM、SRTM（2000）与遥感影像提取的DEM，通过差值计算，获取冰川作用中心冰川表面高程变化。
", "ds_quality": "对不同时期的DEM进行精度检验后，利用坡度坡向与高程差的余弦关系，进行平面与高程校正；然后利用最大曲率与高程差的关系，降低因不同分辨率带来的误差，对两期DEM进行配准和相对精度评价，得到不同时期的冰川高程变化。
", "ds_acq_start_time": "1968-01-01 00:00:00", "ds_acq_end_time": "2013-12-31 00:00:00", "ds_acq_place": "格拉丹东峰", "ds_acq_lon_east": null, "ds_acq_lat_south": null, "ds_acq_lon_west": null, "ds_acq_lat_north": null, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "apply-access", "ds_total_size": 3123933, "ds_files_count": 3, "ds_format": "TIFF", "ds_space_res": "30.0m", "ds_time_res": "", "ds_coordinate": "WGS84", "ds_projection": "", "ds_thumbnail": "9c91a440-fe45-41af-8ea3-aae4d4f873dc.jpg", "ds_thumb_from": 2, "ds_ref_way": "刘时银, 魏俊锋, 吴坤鹏， 等. 中科院寒区旱区环境与工程研究所. 1968-2013年格拉丹东峰地区冰川表面高程变化数据集. 2019。刘时银, 许君利，1968-2013年格拉丹东峰地区冰川表面高程变化数据集，国家冰川冻土沙漠科学数据中心(www.ncdc.ac.cn)，2019，doi：10.12072/DIMaC.0039.2020.db", "paper_ref_way": "", "ds_ref_instruction": "1968-2013年格拉丹东峰地区冰川表面高程变化数据集来源于科技基础性工作专项“中国西部主要冰川作用中心冰量变化调查（2013FY111400）”。数据产权属于中科院寒区旱区环境与工程研究所。本数据集可用地理信息系统软件进行图形可视化。", "ds_from_station": "中国西部主要冰川作用中心冰量变化调查", "organization_id": "75b2f6d5-c7ed-438c-b7be-98672c057ed5", "ds_serv_man": "李红星", "ds_serv_phone": "0931-4967592", "ds_serv_mail": "lihongxing@lzb.ac.cn", "doi_value": "", "subject_codes": null, "quality_level": 3, "publish_time": "2021-01-07 10:44:24", "last_updated": "2023-05-16 17:35:23", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.DIMaC.2020.129", "i18n": { "en": { "title": "Data set of glacier surface elevation changes in the eastern peak area of Gradan from 1968 to 2013", "ds_format": "", "ds_source": "This data set is mainly interpreted data. The main data sources are DEM of topographic map, SRTM (2000) and DEM extracted from remote sensing image.
", "ds_quality": "After checking the accuracy of DEM in different periods, the plane and elevation are corrected by using the cosine relationship between slope aspect and elevation difference. Then, the relationship between the maximum curvature and elevation difference is used to reduce the error caused by different resolutions. The DEM registration and relative accuracy evaluation of the two periods are carried out, and the glacier elevation changes in different periods are obtained
", "ds_ref_way": "Liu Shiyin, Wei Junfeng, Wu Kunpeng, et al. Institute of environment and Engineering in cold and arid regions, Chinese Academy of Sciences. Data set of glacier surface elevation changes in the eastern peak of gradan, 1968-2013. 2019. Liu Shiyin, Xu Junli, 1968-2013 data set of glacier surface elevation change in the eastern peak area of gradan, national glacier frozen soil desert scientific data center（ www.ncdc.ac.cn )，2019，doi：10.12072/DIMaC.0039.2020.db", "ds_abstract": "In this data set, we use DEM, SRTM (2000) and DEM extracted from remote sensing image to get the elevation change of glacier surface of glaciation center through difference calculation. It only aims at the glacier surface elevation change in the eastern peak area of gradan from 1968 to 2013, so it will not be supplemented and improved, and fully open sharing is adopted. The dataset contains two bands, elevation change 1968-2000 and elevationchange 2000-2013. Field measurement unit: meter (m). The data set is mainly extracted from remote sensing images and only represents the change of glacier surface elevation at the time of remote sensing image acquisition. The time is 1968-2000 and 2000-2013.
", "ds_time_res": "", "ds_acq_place": "Eastern Grantham", "ds_space_res": "30.0m", "ds_projection": "", "ds_process_way": "Based on DEM of topographic map, SRTM (2000) and DEM extracted from remote sensing image, the elevation change of glacier surface at the center of glaciation was obtained by difference calculation.
", "ds_ref_instruction": " \nThe data set of glacier surface elevation change in Geladan Dongfeng area from 1968 to 2013 is derived from the special project \"investigation of ice change in major glaciation centers in Western China (2013fy111400)\". The property right of the data belongs to the Institute of environment and Engineering in cold and arid areas of Chinese Academy of Sciences. The data set can be visualized by GIS software." } }, "submit_center_id": "ncdc", "data_level": 0, "license_type": "CC BY 4.0", "ds_topic_tags": [ "冰面高程变化", "格拉丹东峰", "DEM" ], "ds_subject_tags": [ "自然地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "格拉丹东峰" ], "ds_time_tags": [ 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 ], "ds_contributors": [ { "true_name": "刘时银", "email": "liusy@lzb.ac.cn", "work_for": "云南大学国际河流与生态安全研究院", "country": "中国" }, { "true_name": "许君利", "email": "xujunli05@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "吴坤鹏", "email": "wukunpeng2008@lzb.ac.cn", "work_for": "云南大学国际河流与生态安全研究院", "country": "中国" } ], "ds_managers": [ { "true_name": "吴坤鹏", "email": "wukunpeng2008@lzb.ac.cn", "work_for": "云南大学国际河流与生态安全研究院", "country": "中国" }, { "true_name": "刘时银", "email": "liusy@lzb.ac.cn", "work_for": "云南大学国际河流与生态安全研究院", "country": "中国" } ], "category": "冰川" }