本数据集是1990-2018年的伊塞克湖湖面矢量面状数据，属性信息中包含影像数据源的轨道号、成图日期和NDWI值。共174期（102期TM，72期LC8）。
", "ds_source": "采用美国地质调查局（USGS）的全球可视化浏览器（Glovis）（http://glovis.usgs.gov）网站公布的Landsat TM/ETM+/OLI数据作为遥感数据源，包括1990-2011年的69幅Landsat5 、1999年-2006年的32幅Landsat7和2013年-2018年的72幅Landsat8，
", "ds_process_way": "基于绿波段与近红外波段的归一化水体指数（NDWI)来提取影像中的伊塞克湖水体。
", "ds_quality": "90年代的数据从90年至99年，没有92年的数据，91年、97年和98年各仅1个月数据，；21世纪前10年，没有05年的数据，04、06和07年的数据各仅1-2个月，其余年份都有3个月以上数据；2010年至2017年，没有2012年的数据，2018年有4个月的数据，其余年份均有全年12个月的数据。
", "ds_acq_start_time": "2019-01-01 00:00:00", "ds_acq_end_time": "2019-10-31 00:00:00", "ds_acq_place": "伊塞克湖", "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": 5318626, "ds_files_count": 4, "ds_format": ".shp格式", "ds_space_res": "无", "ds_time_res": "无", "ds_coordinate": "WGS84", "ds_projection": "WGS84", "ds_thumbnail": "9ded2668-98bd-4a06-a1d0-cce293f7ed1d.jpg", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "", "ds_from_station": null, "organization_id": "a5877b42-96ea-4f13-af7e-246f355413d6", "doi_value": "", "subject_codes": [ "170.55" ], "quality_level": 1, "publish_time": "2025-04-29 19:00:49", "first_publish_time": null, "last_updated": "2025-05-28 16:31:41", "protected": false, "protected_to": null, "lang": "zh", "cstr": "33110.11.ariddc.00419", "license": null, "extra": null, "files_shape": [ { "name": "LC8-伊塞克湖矢量.rar", "size": 2021262, "is_dir": false }, { "name": "LC8数据目录2013-2018.xls", "size": 36352, "is_dir": false }, { "name": "TM-伊塞克湖矢量.rar", "size": 3226708, "is_dir": false }, { "name": "TM数据目录1990-2011.xls", "size": 34304, "is_dir": false } ], "features": null, "data_level": 0, "i18n": { "en": { "title": "1990-2018 Area change data of Lake Isyk in Kyrgyzstan in", "ds_abstract": "This dataset is vector surface data of Lake Issyk from 1990 to 2018. The attribute information includes the orbit number, mapping date and NDWI value of the image data source. There were 174 stages (102 TM stages, 72 LC8 stages).
", "ds_source": "Using Landsat TM/ETM+/OLI data published on the U.S. Geological Survey (USGS) Global Visualization Browser (Glovis)(http://glovis.usgs.gov) website as remote sensing data sources, including 69 Landsat5 images from 1990 to 2011, 32 Landsat7 images from 1999 to 2006, and 72 Landsat8 images from 2013 to 2018.
", "ds_process_way": "The water body of Issyk Lake in the image is extracted based on the normalized water index (NDWI) in the green band and near infrared band.
", "ds_quality": "The data from the 1990s ranged from 1990 to 1999, but there was no data for 1992, and only one month of data for 1991, 1997 and 1998. In the first 10 years of the 21st century, there was no data for 2005, and the data for 2004, 06 and 07 were only 1-2 months each, and the remaining years had more than 3 months of data; from 2010 to 2017, there was no data for 2012, and there was 4 months of data for 2018, and the remaining years had 12 months of data for the whole year.
", "ds_acq_place": "Issyk-Kul", "ds_format": ".shp format", "ds_projection": "WGS84", "ds_space_res": "no", "ds_time_res": "no" } }, "license_type": null, "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, "ds_topic_tags": [ "湖面", "湖泊" ], "ds_subject_tags": [ "水文学" ], "ds_class_tags": [], "ds_locus_tags": [ "伊塞克湖" ], "ds_time_tags": [ 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 ], "ds_contributors": [ "刘铁", "黄粤" ], "ds_meta_authors": [ "李锦" ], "ds_managers": [ "刘铁" ], "category": "水文" }