{"id":"611f7d50-b419-4d14-b4dd-4a944b141175","title":"基于世界土壤数据库（HWSD）的中国土壤数据集(v1.1)（2009）","title_en":"China soil map based harmonized world soil database (HWSD) (v1.1) (2009)","serial":"寒区旱区科学数据中心","user_limit":"为尊重知识产权、保障数据作者的权益、扩展数据中心的服务、评估数据的应用潜力，请数据使用者在使用数据所产生的研究成果中（包括公开发表的论文、论著、数据产品和未公开发表的研究报告、数据产品等成果），明确注明数据来源和数据作者。对于转载（二次或多次发布）的数据，作者还须注明原始数据来源。","instructions":"数据以栅格img存储，可以用Arcgis、Qgis等遥感软件打开读取。","description":"数据来源于联合国粮农组织（FAO）和维也纳国际应用系统研究所(IIASA)所构建的世界土壤数据库(Harmonized World Soil Database version 1.1 )(HWSD). 中国境内数据源为第二次全国土地调查南京土壤所所提供的1：100万土壤数据。 该数据可为建模者提供模型输入参数,农业角度可用来研究生态农业分区,粮食安全和气候变化等。数据格式:grid栅格格式，投影为WGS84。采用的土壤分类系统主要为FAO-90。\n\n土壤属性表主要字段包括:\nSU_SYM90（FAO90土壤分类系统中土壤名称)；\nSU_SYM85(FAO85分类);\nT_TEXTURE(顶层土壤质地);\nDRAINAGE(19.5);\nREF_DEPTH(土壤参考深度);\nAWC_CLASS(19.5);\nAWC_CLASS(土壤有效水含量);\nPHASE1: Real (土壤相位);\nPHASE2: String (土壤相位)；\nROOTS: String (到土壤底部存在障碍的深度分类)；\nSWR: String (土壤含水量特征)；\nADD_PROP: Real (土壤单元中与农业用途有关的特定土壤类型)；\nT_GRAVEL: Real (碎石体积百分比)；\nT_SAND: Real (沙含量)；\nT_SILT: Real (淤泥含量)；\nT_CLAY: Real (粘土含量)；\nT_USDA_TEX: Real (USDA土壤质地分类)；\nT_REF_BULK: Real (土壤容重)；\nT_OC: Real (有机碳含量)；\nT_PH_H2O: Real (酸碱度)\nT_CEC_CLAY: Real (粘性层土壤的阳离子交换能力)；\nT_CEC_SOIL: Real (土壤的阳离子交换能力)\nT_BS: Real (基本饱和度)；\nT_TEB: Real (交换性盐基)；\nT_CACO3: Real (碳酸盐或石灰含量)\nT_CASO4: Real (硫酸盐含量)；\nT_ESP: Real (可交换钠盐)；\nT_ECE: Real (电导率)。\n其中以T_开头属性字段表示上层土壤属性（0-30cm），以S_开头属性字段表示下层土壤属性（30-100cm）。 \n具体属性值代表何意义请参考文件夹下说明文档*.pdf及数据库*.mdb。","doi":"","projection":null,"language":"zh","share_type":"online","east":135.5,"west":73.2,"south":17.8,"north":53.9,"scale":null,"crs":null,"filesize":43.2,"share_policy":"a","ts_created":"2019-09-21T18:20:37+08:00","doi_type":"国际公开共享数据","ts_updated":"2021-04-20T00:46:34.410496+08:00","time_description":"2009","datas_group":3,"time_description_en":"","data_format":"ENVI Image","project":[10,11],"specials":["1832ecb3-70d0-4b5e-bdb5-2e9ff4ad1efe"],"cite":null,"review_status":5,"review_invite":[],"review_editor":{"id":21057,"last_login":"2022-04-02T11:43:37.753860+08:00","username":"gecm","email":"gechm@lzb.ac.cn","is_active":true,"is_staff":true,"user_name":"盖春梅"},"data_sources":null,"temporal_resolution":"Yearly","spatial_resolution":"","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[],"subtopics":{"metadata":"611f7d50-b419-4d14-b4dd-4a944b141175","three_pole":null,"third_pole":null},"username":"盖春梅","review_time":null,"protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":150606}