本数据集针对祁连山七一冰川，数据集包括序号、经度、纬度、高程。数据集包含51条记录，主要依托冰川表面布设的花杆作为测点，使用M721手持GPS测定花杆处测点的位置和高程，每个测点测量时间30分钟以上，本数据集2012年和2017年两年实测资料。完全开放共享。数据集中经度，单位度(°)，纬度，单位度(°)，高程，单位米(m)。
", "ds_source": "自主产生。
", "ds_process_way": "依托花杆作为测点位置，利用集思宝M721手持差分GPS对花杆位置和海拔高度进行记录。在数据实测中，对集思宝M721手持差分GPS进行了参数校正，每个测点测量时间30分钟以上；GPS测量过程规范化和标准化，并严格复核。
", "ds_quality": "采用4-6台华测X20或T5 GNSS进行联测，同步测量时间1小时以上，并采用1-3个国家级控制点进行联测；成果解算精度控制在2cm以内
", "ds_acq_start_time": "2015-05-01 00:00:00", "ds_acq_end_time": "2017-07-31 00:00:00", "ds_acq_place": "祁连山七一冰川", "ds_acq_lon_east": 97.75777777777778, "ds_acq_lat_south": null, "ds_acq_lon_west": null, "ds_acq_lat_north": 39.240833333333335, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "apply-access", "ds_total_size": 36750, "ds_files_count": 3, "ds_format": "EXCEL", "ds_space_res": "", "ds_time_res": "", "ds_coordinate": "WGS84", "ds_projection": "", "ds_thumbnail": null, "ds_thumb_from": 2, "ds_ref_way": "李真，王宁练，陈安安， 等. 中科院寒区旱区环境与工程研究所. 2015年和2017年祁连山七一冰川主流线冰面高程变化数据集. 2019。李真, 陈安安，2015年和2017年祁连山七一冰川主流线冰面高程变化数据集，国家冰川冻土沙漠科学数据中心(www.ncdc.ac.cn)，2019，doi：10.12072/DIMaC.0059.2020.db", "paper_ref_way": "", "ds_ref_instruction": "2015年和2017年祁连山七一冰川主流线冰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Microsoft office软件打开查看，也可以导入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": "2020-12-21 14:15:09", "last_updated": "2023-05-16 17:35:01", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.DIMaC.2020.108", "i18n": { "en": { "title": "Data set of ice surface elevation change of Qiyi glacier mainstream line in Qilian Mountains in 2015 and 2017", "ds_format": "", "ds_source": "Self generated.
", "ds_quality": "4-6 stations of China Survey X20 or T5 GNSS are used for joint survey, the synchronous measurement time is more than 1 hour, and 1-3 national control points are used for joint survey; the result calculation accuracy is controlled within 2cm
", "ds_ref_way": "\nLi Zhen, Wang Ninglian, Chen An'an, et al. Institute of environment and Engineering in cold and arid regions, Chinese Academy of Sciences. Data sets of ice surface elevation changes of Qiyi glacier mainstream line in Qilian Mountains in 2015 and 2017. 2019. Li Zhen, Chen An'an, 2015 and 2017 Qiyi glacier mainstream line ice surface elevation data set, national glacier frozen soil desert scientific data center（ www.ncdc.ac.cn )，2019，doi：10.12072/DIMaC.0059.2020.db", "ds_abstract": "This data set is aimed at Qi Yi glacier in Qilian Mountain. The data set includes serial number, longitude, latitude and elevation. The data set contains 51 records, mainly relying on the flower stalks arranged on the surface of the glacier as the measuring points. The m721 handheld GPS was used to measure the position and elevation of the measuring points at the flower pole. The measurement time of each measuring point was more than 30 minutes. The data set was measured in 2012 and 2017. Fully open sharing. Data set longitude, unit degree (°), latitude, unit degree (°), elevation, unit meter (m).
", "ds_time_res": "", "ds_acq_place": "Qiyi glacier in Qilian Mountains", "ds_space_res": "", "ds_projection": "", "ds_process_way": "Based on the flower stalk as the measuring point position, jisibao m721 hand-held differential GPS was used to record the flower stalk position and altitude. In the data measurement, jisibao m721 hand-held differential GPS is calibrated, and the measurement time of each measuring point is more than 30 minutes; the GPS measurement process is standardized and standardized, and strictly reviewed.
", "ds_ref_instruction": "\nThe data sets of ice surface elevation change along the mainstream line of Qiyi glacier in Qilian Mountains in 2015 and 2017 are derived from the \"survey of ice quantity 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. This data set can be opened and viewed by Microsoft office software or imported into GIS software for graphic visualization." } }, "submit_center_id": "ncdc", "data_level": 0, "recommendation_value": 0, "license_type": "https://creativecommons.org/licenses/by/4.0/", "doi_reg_from": "reg_local", "cstr_reg_from": "reg_local", "doi_not_reg_reason": null, "cstr_not_reg_reason": null, "is_paper_in_submitting": false, "belong_to_nieer": false, "ds_topic_tags": [ "冰面高程", "祁连山七一冰川", "GPS" ], "ds_subject_tags": [], "ds_class_tags": [], "ds_locus_tags": [ "祁连山七一冰川" ], "ds_time_tags": [ 2015, 2017 ], "ds_contributors": [ { "true_name": "李真", "email": "lizhen@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "" }, { "true_name": "陈安安", "email": "", "work_for": "中国科学院西北生态环境资源研究院", "country": "" } ], "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": "李真", "email": "lizhen@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "" } ], "category": "冰川" }