{
    "created": "2025-03-17 14:25:55",
    "updated": "2026-05-09 12:46:00",
    "id": "0cfbd686-ab84-416e-81b8-b8b32f967519",
    "version": 3,
    "ds_topic": null,
    "title_cn": "1986-2017年咸海湖面变化数据",
    "title_en": "",
    "ds_abstract": "<p>本数据集是1986-2017年的咸海的湖面矢量数据，共113期，其中1990年、1995年、1997年、2004年、2005年、2012年，6年没有数据，其余年份均有1-10期数据，属性信息中包含影像数据源的轨道号、成图日期和NDWI值。本数据是基于Landsat TM/ETM+/OLI数据提取的湖泊面积信息，空间分辨率30米。</p>",
    "ds_source": "<p>原始影像数据来源于美国地质调查局（USGS）的全球可视化浏览器网站（http://glovis.usgs.gov），1986-2017年LandsatTM/ETM+/OLI影像数据矢量化得到，数据分辨率30米，比例尺1：10万。选取的数据满足以下要求：①云覆盖少（云覆盖率&lt;30%）；②阴影较少、色调层次分明；③无噪声。</p>",
    "ds_process_way": "<p>基于绿波段与近红外波段的归一化水体指数（NDWI)，采用“全域-局部”自适应迭代的阈值分割方法提取湖泊面积信息。</p>",
    "ds_quality": "<p>自动解译的矢量数据在结合目视修正工作后，取得了较高的精度，能够满足研究需求。</p>",
    "ds_acq_start_time": "1986-05-01 00:00:00",
    "ds_acq_end_time": "2017-09-01 00:00:00",
    "ds_acq_place": "咸海",
    "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": "离线申请",
    "ds_total_size": 46197696,
    "ds_files_count": 1,
    "ds_format": ".shp",
    "ds_space_res": "30",
    "ds_time_res": "月",
    "ds_coordinate": "WGS84",
    "ds_projection": "WGS84",
    "ds_thumbnail": "0cfbd686-ab84-416e-81b8-b8b32f967519.png",
    "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": [
        "170.45"
    ],
    "quality_level": 1,
    "publish_time": "2025-03-17 19:03:01",
    "first_publish_time": null,
    "last_updated": "2025-05-28 16:39:51",
    "protected": false,
    "protected_to": null,
    "lang": "zh",
    "cstr": "33110.11.ariddc.00319",
    "license": null,
    "extra": null,
    "files_shape": [
        {
            "name": "Data.rar",
            "size": 46197696,
            "is_dir": false
        }
    ],
    "features": null,
    "data_level": 0,
    "ds_topic_tags": [
        "湖泊",
        "面积变化"
    ],
    "ds_subject_tags": [
        "地理学"
    ],
    "ds_class_tags": [],
    "ds_locus_tags": [
        "咸海"
    ],
    "ds_time_tags": [
        1986,
        1987,
        1988,
        1989,
        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
    ],
    "ds_contributors": [
        "黄粤",
        "刘铁"
    ],
    "ds_meta_authors": [
        "黄粤"
    ],
    "ds_managers": [
        "刘铁"
    ],
    "category": "水文"
}