本数据集来自中科院寒旱所颜长珍等人完成的张掖市2005年土地利用数据集。该数据采用一个分层的土地覆盖分类系统，有6个一级类（耕地、林地、草地、水域、城乡、工矿、居民用地和未利用土地），25个二级类，覆盖甘肃省张掖市五县一区，据范围覆盖全部张掖市。
", "ds_source": "基于2005年前后的Landsat TM和ETM遥感数据通过人工判读的方法产生的。
", "ds_process_way": "分类标准采用中国科学院自1986年以来使用的土地利用分类标准。数据类型为矢量多边形；以Shape格式存储。
", "ds_quality": "数据质量良好
", "ds_acq_start_time": "2005-01-01 00:00:00", "ds_acq_end_time": "2005-12-31 00:00:00", "ds_acq_place": "黑河流域张掖市", "ds_acq_lon_east": 104.19972222222222, "ds_acq_lat_south": 37.7, "ds_acq_lon_west": 96.06666666666666, "ds_acq_lat_north": 43.266666666666666, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "login-access", "ds_total_size": 71324685, "ds_files_count": 3, "ds_format": "矢量", "ds_space_res": null, "ds_time_res": "年", "ds_coordinate": "WGS84", "ds_projection": "+proj=longlat +datum=WGS84 +no_defs", "ds_thumbnail": "396e714a-3a9f-4d42-ab93-9cab17942653.png", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "None", "ds_from_station": null, "organization_id": "9c4867b1-5cb1-4de0-abeb-df42547bf41e", "ds_serv_man": "黑河计划数据管理中心", "ds_serv_phone": "0931-4967596", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": [ "170.4510" ], "quality_level": 3, "publish_time": "2021-08-17 14:35:48", "last_updated": "2023-08-23 16:46:39", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.Westdc.2020.386", "license": null, "i18n": { "en": { "title": "Land use / land cover data set of Zhangye City (2005)", "ds_format": "Shapefile", "ds_source": "This data is based on Landsat TM and ETM Remote sensing data around 2005, and is generated by manual interpretation.
", "ds_quality": "Good data quality
", "ds_ref_way": "", "ds_abstract": "This data set comes from the land use data set of Zhangye City in 2005 completed by Yan Changzhen, Institute of cold and drought, Chinese Academy of Sciences. This data is based on Landsat TM and ETM Remote sensing data before and after 2005, which are produced by manual interpretation. The data adopts a hierarchical land cover classification system, including 6 first-class categories (cultivated land, forest land, grassland, water area, urban and rural areas, industrial and mining land, residential land and unused land), 25 second-class categories, covering five counties and one district of Zhangye City, Gansu Province. The classification standard adopts the land use classification standard used by the Chinese Academy of Sciences since 1986. The data type is vector polygon; it is stored in shape format; the data range covers Zhangye City.
", "ds_time_res": "年", "ds_acq_place": "Zhangye City in Heihe River Basin", "ds_space_res": "", "ds_projection": "+proj=longlat +datum=WGS84 +no_defs", "ds_process_way": "The classification standard is the land use classification standard used by Chinese Academy of Sciences since 1986. The data type is vector polygon; it is stored in shape 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 invited to use the data\r\nStudents' research results (including published papers, treatises, data products and unpublished research reports, data products, etc.) shall be clearly indicated with data\r\nSource and data author. 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": [ "土地利用", "土地覆盖", "张掖市" ], "ds_subject_tags": [ "自然地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "黑河流域", "张掖市" ], "ds_time_tags": [ 2005 ], "ds_contributors": [ { "true_name": "王建华 ", "email": "jhwang@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": "黑河计划数据管理中心", "email": "westdc@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "" } ], "ds_managers": [ { "true_name": "王建华 ", "email": "jhwang@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" }