本数据集以卫星遥感为手段，基于Landsat MSS, TM和ETM遥感数据构建的。本数据采用一个分层的土地覆盖分类系统，将全区域分为6个一级分类（耕地、林地、草地、水域、城乡、工矿、居民用地与未利用土地），31个二级分类。
", "ds_source": "本数据集采用分层土地覆盖分类系统，共分为6个一级分类（耕地、林地、草地、水域、城乡、工矿、居民用地与未利用土地），31个二级分类。
", "ds_process_way": "数据集基于Landsat MSS、TM与ETM遥感数据为底图，数据集投影设置为Alberts等积投影，将比例尺放在1:24000下进行人机交互目视解译，数据集存储形式为ESRI coverage格式。
", "ds_quality": "数据质量良好
", "ds_acq_start_time": "1990-01-01 00:00:00", "ds_acq_end_time": "1990-12-01 00:00:00", "ds_acq_place": "黄河上游", "ds_acq_lon_east": 112.0, "ds_acq_lat_south": 32.0, "ds_acq_lon_west": 95.0, "ds_acq_lat_north": 42.0, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "apply-access", "ds_total_size": 41509565, "ds_files_count": 2, "ds_format": "adf", "ds_space_res": null, "ds_time_res": "日", "ds_coordinate": "WGS84", "ds_projection": "", "ds_thumbnail": "f9f9d418-58f5-4416-8b02-f08f200f6a8a.png", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": null, "ds_from_station": null, "organization_id": "52b7b79b-860c-49a5-9083-9a70cf8bed5a", "ds_serv_man": "敏玉芳", "ds_serv_phone": "0931-4967596 ", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": null, "quality_level": 3, "publish_time": "2020-12-24 11:55:13", "last_updated": "2023-08-23 17:01:57", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.Azs.2020.299", "license": null, "i18n": { "en": { "title": "1:100000 Landuse data in the Yellow River Upstream of 1990", "ds_format": "", "ds_source": "The data set adopts a hierarchical land cover classification system, which is divided into 6 first-class classifications (cultivated land, forest land, grassland, water area, urban and rural areas, industrial and mining land, residential land and unused land), and 31 second-class classifications.
", "ds_quality": "Good data quality
", "ds_ref_way": "", "ds_abstract": "This dataset is based on LANDSAT MSS, TM and ETM Remote sensing data. Using a hierarchical land cover classification system, the data divides the whole region into six first-class classifications (cultivated land, forest land, grassland, water area, urban and rural areas, industrial and mining land, residential land and unused land), and 31 second-class classifications.
", "ds_time_res": "日", "ds_acq_place": "", "ds_space_res": "", "ds_projection": "", "ds_process_way": "The data set is based on the LANDSAT MSS, TM and ETM Remote sensing data as the base map, the projection of the data set is set as the Alberts equal product projection, the scale is placed at 1:24000 for human-computer interactive visual interpretation, and the storage form of the data set is ESRI coverage format.
", "ds_ref_instruction": " In order to respect intellectual property rights, protect the rights and interests of data authors, expand the services of data centers, and evaluate the application potential of data, data users are requested to clearly indicate the data source and data authors in the research results (including published papers, works, data products and unpublished research reports, data products, etc.) produced by using data. For data reprinted (secondary or multiple releases), the author must also indicate the source of the original data." } }, "submit_center_id": "ncdc", "data_level": 0, "license_type": "CC BY 4.0", "ds_topic_tags": [ "1:10万", "黄河上游", "土地利用" ], "ds_subject_tags": [ "自然地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "黄河上游" ], "ds_time_tags": [ 1990 ], "ds_contributors": [ { "true_name": "薛娴", "email": "xianxue@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": "杜鹤强", "email": "dilikexue119@163.com", "work_for": "中国科学院西北生态环境资源研究院", "country": "" } ], "ds_managers": [ { "true_name": "薛娴", "email": "xianxue@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "中国" } ], "category": "基础地理" }