本数据集是黑河流域历史时期垦殖绿洲空间分布数据，以历史文献、20世纪60年代地形图和遥感影像为基础，利用居民点、灌渠等地物重建了黑河流域汉代到民国时期古绿洲分布范围和面积数据。
", "ds_source": "历史影像为基础
", "ds_process_way": "该数据以ArcGIS的shapefile格式提供，采用WGS 1984 UTM坐标系，Transverse Mercator投影格网，中央经线99°E。数据类型为面状矢量，属性数据包括面积。
", "ds_quality": "数据类型为面状矢量，属性数据包括面积，数据质量良好。
", "ds_acq_start_time": "1954-02-10 00:00:00", "ds_acq_end_time": "1989-01-04 00:00:00", "ds_acq_place": "黑河流域河西走廊", "ds_acq_lon_east": 102.0, "ds_acq_lat_south": 37.766666666666666, "ds_acq_lon_west": 98.0, "ds_acq_lat_north": 42.766666666666666, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "login-access", "ds_total_size": 594047, "ds_files_count": 2, "ds_format": "shp", "ds_space_res": null, "ds_time_res": "分、日、次", "ds_coordinate": "WGS84", "ds_projection": "", "ds_thumbnail": "37f754af-9d42-4d8f-9579-151cd0756123.png", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "None", "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": [ "170.4510" ], "quality_level": 3, "publish_time": "2021-01-06 15:52:24", "last_updated": "2023-08-23 17:03:10", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.nieer.2020.1635", "i18n": { "en": { "title": "A dataset of the spatial distribution of cultivated oasis in the Black River Basin during the historical period", "ds_format": "shp", "ds_source": "Based on historical images
", "ds_quality": "The data type is a polygon, the attribute data includes area, and the data quality is good.
", "ds_ref_way": "", "ds_abstract": "This dataset is the spatial distribution data of the settlement oasis in the historical period of the Heihe River Basin. Based on historical documents, topographic maps and remote sensing images from the 1960s, the data on the distribution range and area of the ancient oasis in the Heihe River Basin from the Han Dynasty to the Republic of China were reconstructed using features such as settlements and irrigation canals.
", "ds_time_res": "分、日、次", "ds_acq_place": "Hexi Corridor in Heihe River Basin", "ds_space_res": "", "ds_projection": "", "ds_process_way": "The data is provided in ArcGIS shapefile format using the WGS 1984 UTM coordinate system, Transverse Mercator projection grid with a central meridian of 99°E. The data type is a surface vector and the attribute data includes area.
", "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": "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, "ds_topic_tags": [ "绿洲", "垦殖绿洲", "农业绿洲" ], "ds_subject_tags": [ "自然地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "黑河流域", "河西走廊" ], "ds_time_tags": [ 1954, 1955, 1956, 1957, 1958, 1959, 1960, 1961, 1962, 1963, 1964, 1965, 1966, 1967, 1968, 1969, 1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989 ], "ds_contributors": [ { "true_name": "颉耀文", "email": "xieyw@lzu.edu.cn", "work_for": "兰州大学", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "颉耀文", "email": "xieyw@lzu.edu.cn", "work_for": "兰州大学", "country": "中国" } ], "ds_managers": [ { "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": "" }, { "true_name": "颉耀文", "email": "xieyw@lzu.edu.cn", "work_for": "兰州大学", "country": "中国" } ], "category": "生态" }