{
    "created": "2025-05-06 17:42:29",
    "updated": "2026-05-09 12:45:17",
    "id": "75498868-cfc3-4da9-8bdb-4dee9ea5e3d5",
    "version": 2,
    "ds_topic": null,
    "title_cn": "2018年、2019年咸海湖面变化数据",
    "title_en": "",
    "ds_abstract": "<p>数据包含2018年和2019年2期的咸海湖面矢量数据，数据以shp格式存储。基于2018、2019年2期Landsat影像，采用“全域-局部”自适应迭代的阈值分割方法提取得到的湖泊面积信息。</p>",
    "ds_source": "<p>原始影像数据来源于美国地质调局（http://glovis.usgs.gov）， 包括2018、2019年Landsat TM/ETM+/OLI数据，分辨率30米。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。矢量数据产品由中国科学院A类战略性先导科技专项课题（XDA20060301）成果的一部分。</p>",
    "ds_process_way": "<p>基于2018、2019年2期Landsat影像，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": "2020-06-01 00:00:00",
    "ds_acq_end_time": "2020-06-01 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": 312530,
    "ds_files_count": 2,
    "ds_format": ".shp格式",
    "ds_space_res": "无",
    "ds_time_res": "无",
    "ds_coordinate": "WGS84",
    "ds_projection": "WGS84",
    "ds_thumbnail": "75498868-cfc3-4da9-8bdb-4dee9ea5e3d5.png",
    "ds_thumb_from": 2,
    "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": "2025-05-06 18:25:51",
    "first_publish_time": null,
    "last_updated": "2025-05-28 17:01:29",
    "protected": false,
    "protected_to": null,
    "lang": "zh",
    "cstr": "33110.11.ariddc.00441",
    "license": null,
    "extra": null,
    "files_shape": [
        {
            "name": "aralsea2018shp.rar",
            "size": 68850,
            "is_dir": false
        },
        {
            "name": "aralsea2019shp.rar",
            "size": 243680,
            "is_dir": false
        }
    ],
    "features": null,
    "data_level": 0,
    "ds_topic_tags": [
        "湖面"
    ],
    "ds_subject_tags": [
        "水文学"
    ],
    "ds_class_tags": [],
    "ds_locus_tags": [
        "咸海"
    ],
    "ds_time_tags": [
        2018,
        2019
    ],
    "ds_contributors": [
        "黄粤",
        "刘铁"
    ],
    "ds_meta_authors": [
        "黄粤"
    ],
    "ds_managers": [
        "刘铁"
    ],
    "category": "水文"
}