{
    "created": "2024-09-24 11:28:47",
    "updated": "2026-05-09 12:45:28",
    "id": "9d1a78cc-d9c4-4d80-8ce1-92f8e488d945",
    "version": 6,
    "ds_topic": null,
    "title_cn": "1970年中亚五国及新疆范围265米土地利用数据",
    "title_en": "",
    "ds_abstract": "<p>本数据反映了1970年中亚五国及新疆范围的土地利用情况，采用《中国科学院土地利用分类系统》共分耕地，林地，草地，水域，城乡、工矿、居民用地，未利用土地等18个类别。数据以GRID格式存储，空间投影使用WGS_84_Albers直角坐标系，单位米，像元分辨率265米。</p>",
    "ds_source": "<p>1970年代Landsat MSS影像。</p>",
    "ds_process_way": "<p>首先通过辐射校正消除传感器噪声和大气干扰，利用几何校正配准影像；随后基于多光谱波段（如近红外与红光比值）提取植被指数等光谱特征，结合监督分类（最大似然法）或非监督聚类算法（如K-means）对地物进行粗粒度分类，生成耕地、森林、水体等一级土地利用类型；最后通过滤波消除孤立噪声像元，并基于目视解译和局部实地数据验证分类精度，输出土地利用结果数据。</p>",
    "ds_quality": "",
    "ds_acq_start_time": "1970-01-01 00:00:00",
    "ds_acq_end_time": "1970-12-31 00:00:00",
    "ds_acq_place": "哈萨克斯坦；吉尔吉斯坦；塔吉克斯坦；乌兹别克斯坦；土库曼斯坦",
    "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": 5983328,
    "ds_files_count": 2,
    "ds_format": "栅格数据",
    "ds_space_res": "265米",
    "ds_time_res": "无",
    "ds_coordinate": "WGS84",
    "ds_projection": "Albers",
    "ds_thumbnail": "9d1a78cc-d9c4-4d80-8ce1-92f8e488d945.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": [
        "170.45"
    ],
    "quality_level": 1,
    "publish_time": "2025-03-26 10:45:10",
    "first_publish_time": null,
    "last_updated": "2025-05-28 17:45:56",
    "protected": false,
    "protected_to": null,
    "lang": "zh",
    "cstr": "33110.11.ariddc.00119",
    "license": null,
    "extra": null,
    "files_shape": [
        {
            "name": "1970年中亚五国及新疆范围土地利用与覆被数据集.rar",
            "size": 5948000,
            "is_dir": false
        },
        {
            "name": "中国科学院土地利用分类系统-2011年.doc",
            "size": 35328,
            "is_dir": false
        }
    ],
    "features": null,
    "data_level": 0,
    "ds_topic_tags": [
        "土地利用",
        "土地覆被"
    ],
    "ds_subject_tags": [
        "地理学"
    ],
    "ds_class_tags": [],
    "ds_locus_tags": [
        "中亚",
        "新疆"
    ],
    "ds_time_tags": [
        1970
    ],
    "ds_contributors": [
        "罗格平",
        "刘铁"
    ],
    "ds_meta_authors": [
        "李锦"
    ],
    "ds_managers": [
        "刘铁"
    ],
    "category": "土地利用/土地覆被"
}