六盘山国家级重点预防区土地利用图数据集包括甘肃省华亭县和宁夏回族自治区泾源县等区域2013年、2014年、2015年、2016年和2017年的土地利用，空间分辨率为25米，保存格式为tif，数据命名采用“所属重点治理区＋行政区＋年份＋土地利用图”的形式，如“××重点治理区××县××年土地利用图”。土地利用的分类系统包括8个一级类、22个二级类和2个三级类。所有专题图投影均采用高斯—克吕格，坐标系采用CGCS2000。
", "ds_source": "数据源为Landsat TM和ETM+数据，主要从美国地质调查局（USGS，https://glovis.usgs.gov/） 获取，少数从中国地理空间数据云（http://www.gscloud.cn/） 获取
", "ds_process_way": "基于eCognition软件平台，采用面向对象计算机自动分类与人工目视解译相结合的方法，提取研究区逐年土地利用数据。最后采用三种方法对数据精度进行验证：野外样本点调查、高分辨率影像识别和Google Earth的样本点识别。
", "ds_quality": "遥感影像均经过辐射纠正、正射纠正以及融合、镶嵌等预处理。\n最小图斑面积对应的实际地物面积不小于0.1hm2，多边形无重叠、无空隙，图斑属性无空置或冗余。\n遥感影像解译前，采用遥感影像、典型调查、与实地对照的方法建立土地利用遥感解译标志。\n基于遥感影像，结合解译标志，提取土地利用类型。\n解译结果复查：抽取不少于总图斑的5%进行核查。\n野外验证样本数量和成果满足《水土保持遥感监测技术规范》（SL592-2012）的要求，对于核查图斑，抽取10%作为验证样本进行实地验证。
", "ds_acq_start_time": "2013-01-01 00:00:00", "ds_acq_end_time": "2017-12-31 00:00:00", "ds_acq_place": "六盘山国家级重点预防区", "ds_acq_lon_east": 106.87888888888888, "ds_acq_lat_south": 35.020833333333336, "ds_acq_lon_west": 106.18666666666667, "ds_acq_lat_north": 35.79333333333333, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "apply-access", "ds_total_size": 21541945, "ds_files_count": 2, "ds_format": "TIF", "ds_space_res": "25.0m", "ds_time_res": "年", "ds_coordinate": "CGCS2000", "ds_projection": "高斯—克吕格", "ds_thumbnail": "0dc30f7e-af29-4741-9fa3-10dc542e6d59.jpg", "ds_thumb_from": 2, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "", "ds_from_station": null, "organization_id": "18fc6591-ef53-4202-bc01-c3961ad212d2", "ds_serv_man": "敏玉芳", "ds_serv_phone": "0931-4967596", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": [], "quality_level": 3, "publish_time": "2021-10-27 14:09:57", "last_updated": "2024-03-19 16:54:24", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.HHSTBC.2020.135", "i18n": { "en": { "title": "Data set of land use map of Liupanshan national key prevention area from 2013 to 2017", "ds_format": "", "ds_source": "", "ds_quality": "The remote sensing images are preprocessed by radiation correction, orthorectification, fusion and mosaic.\nThe actual surface area corresponding to the minimum patch area is not less than 0.1 Hm2, the polygon has no overlap, no gap, and the patch attribute has no vacancy or redundancy.\nBefore remote sensing image interpretation, remote sensing image, typical survey and field comparison were used to establish remote sensing interpretation marks of land use.\nBased on the remote sensing image, combined with the interpretation marks, the land use types are extracted.\nReexamination of interpretation results: take no less than 5% of the total map spots for verification.\nThe number and results of field verification samples meet the requirements of technical specification for remote sensing monitoring of soil and water conservation (sl592-2012). For the verification map spots, 10% of the verification samples are selected for field verification.
", "ds_ref_way": "", "ds_abstract": "", "ds_time_res": "年", "ds_acq_place": "Liupanshan national key prevention area", "ds_space_res": "25.0m", "ds_projection": "", "ds_process_way": "", "ds_ref_instruction": "" } }, "submit_center_id": "ncdc", "data_level": 0, "recommendation_value": 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": [ "土地利用统计表", "8个一级类要素，22个二级类要素，2个三级类要素" ], "ds_subject_tags": [], "ds_class_tags": [], "ds_locus_tags": [ "宁夏回族自治区", "重点预防区", "华亭县", "土地利用", "泾源县", "甘肃省", "六盘山" ], "ds_time_tags": [ 2013, 2014, 2015, 2016, 2017 ], "ds_contributors": [ { "true_name": "黄河流域水土保持生态环境监测中心", "email": "1283337@qq.com", "work_for": "黄河流域水土保持生态环境监测中心", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "黄河流域水土保持生态环境监测中心", "email": "szyjdata@163.com", "work_for": "黄河流域水土保持生态环境监测中心", "country": "中国" } ], "ds_managers": [ { "true_name": "黄河流域水土保持生态环境监测中心", "email": "szyjdata@163.com", "work_for": "黄河流域水土保持生态环境监测中心", "country": "中国" } ], "category": "水土保持" }