{
    "created": "2024-09-19 10:36:49",
    "updated": "2026-05-09 14:30:53",
    "id": "91d68537-e938-4a66-9f78-798909e8c751",
    "version": 11,
    "ds_topic": null,
    "title_cn": "新疆1：25万荒漠数据（1975-2020年）",
    "title_en": "",
    "ds_abstract": "<p>利用多源、多时相遥感影像，采用分区分层的决策树方法，首先基于e-Cognition遥感解译软件，完成面向对象多尺度影像分割。并通过叠加分析海拔、降水、气温、土壤、植被、地貌等单要素图，得到地学大尺度分区地块的二级类解译结果，在具有地学特征的大尺度分割单元基础上，继续以影像光谱特征作为分类评判依据，依次分层得到荒漠的解译结果。数据精度采用三级质控质检方案，并采用野外采样验证的方法，确保荒漠精度大于85%。</p>",
    "ds_source": "<p>MSS、TM、ETM、OLI、Sentinal-2等多源遥感影像。</p>",
    "ds_process_way": "<p>利用多源、多时相遥感影像，采用分区分层的决策树方法，首先基于e-Cognition遥感解译软件，完成面向对象多尺度影像分割。并通过叠加分析海拔、降水、气温、土壤、植被、地貌等单要素图，得到地学大尺度分区地块的二级类解译结果，在具有地学特征的大尺度分割单元基础上，继续以影像光谱特征作为分类评判依据，依次分层得到荒漠的解译结果。</p>",
    "ds_quality": "<p>本数据是在具有地学特征的大尺度分割单元基础上，继续以影像光谱特征作为分类评判依据，依次分层得到荒漠的解译结果。解译精度优于85%。</p>",
    "ds_acq_start_time": "1975-01-01 00:00:00",
    "ds_acq_end_time": "2020-12-31 00:00:00",
    "ds_acq_place": "新疆全域",
    "ds_acq_lon_east": null,
    "ds_acq_lat_south": 34.0,
    "ds_acq_lon_west": 73.85861,
    "ds_acq_lat_north": 49.270557,
    "ds_acq_alt_low": null,
    "ds_acq_alt_high": null,
    "ds_share_type": "在线下载",
    "ds_total_size": 0,
    "ds_files_count": 0,
    "ds_format": "矢量",
    "ds_space_res": "1：25万",
    "ds_time_res": "10-15年一期",
    "ds_coordinate": "CGCS2000",
    "ds_projection": "Albers",
    "ds_thumbnail": "91d68537-e938-4a66-9f78-798909e8c751.jpg",
    "ds_thumb_from": 2,
    "ds_ref_way": "",
    "paper_ref_way": "",
    "ds_ref_instruction": "新疆1：25万荒漠数据（1975-2020年）来源于第三次新疆综合科学考察专项 \"科考数据平台与标准体系建设(2021xjkk1300)\"",
    "ds_from_station": null,
    "organization_id": "a5877b42-96ea-4f13-af7e-246f355413d6",
    "doi_value": "",
    "subject_codes": [
        "170.45"
    ],
    "quality_level": 1,
    "publish_time": "2024-12-09 16:46:34",
    "first_publish_time": "2024-12-09 16:46:34",
    "last_updated": "2025-12-15 13:17:36",
    "protected": false,
    "protected_to": null,
    "lang": "zh",
    "cstr": "33110.11.XIEG.XJSEDATA.2022.00005927",
    "license": null,
    "extra": null,
    "files_shape": [],
    "features": null,
    "data_level": 0,
    "ds_topic_tags": [
        "荒漠",
        "时空分布"
    ],
    "ds_subject_tags": [
        "地理学"
    ],
    "ds_class_tags": [],
    "ds_locus_tags": [
        "新疆"
    ],
    "ds_time_tags": [
        1975,
        1976,
        1977,
        1978,
        1979,
        1980,
        1981,
        1982,
        1983,
        1984,
        1985,
        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,
        2018,
        2019,
        2020
    ],
    "ds_contributors": [
        "常存"
    ],
    "ds_meta_authors": [
        "常存",
        "朱晓蓉"
    ],
    "ds_managers": [
        "黎秀花"
    ],
    "category": "水文"
}