本数据集的源数据来源于第二次土壤普查的1：100万中国土壤图（Shi et al., 2004）和8595个土壤剖面。连接时考虑到了剖面与图斑间的距离、土壤剖面个数和土壤分类信息。具体说明请见相关论文及网页。数据文件包括：sand1.flt, clay1.flt – 表层(0-30cm) 砂粒、粘粒含量、sand2.flt, clay2.flt – 底层(30-100cm) 砂粒、粘粒含量、psd.hdr – 头文件，ncols – 列数、nrows – 行数、xllcorner – 左下角纬度、yllcorner – 左下角经度、cellsize – 单元格大小、NODATA_value – 空值、byteorder - LSBFIRST, Least Significant Bit First、TIFF 栅格文件包括:、sand1.tif, clay1.tif -表层(0-30cm) 砂粒、粘粒含量。、sand2.tif, clay2.tif -底层(30-100cm) 砂粒、粘粒含量。数据详细信息请参考http://globalchange.bnu.edu.cn/research/soil。
", "ds_source": "本数据集的源数据来源于第二次土壤普查的1：100万中国土壤图（和8595个土壤剖面。
", "ds_process_way": "采用了多边形连接法将土壤剖面和土壤图斑连接起来得到了土壤砂粒、粉粒和粘粒含量图。
", "ds_quality": "数据质量良好
", "ds_acq_start_time": "2010-01-01 00:00:00", "ds_acq_end_time": "2010-12-31 00:00:00", "ds_acq_place": "黑河流域", "ds_acq_lon_east": 104.19972222222222, "ds_acq_lat_south": 37.7, "ds_acq_lon_west": 96.01666666666667, "ds_acq_lat_north": 43.25, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "login-access", "ds_total_size": 966039, "ds_files_count": 2, "ds_format": "FLT/TIF", "ds_space_res": "1000.0m", "ds_time_res": "", "ds_coordinate": "WGS84", "ds_projection": "GCS_Krasovsky_1940", "ds_thumbnail": "a9800bf3-2789-4a15-822e-a620c5b49100.png", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "本数据来源于北京师范大学，用户在使用数据时请在正文中明确声明数据的来源。", "ds_from_station": null, "organization_id": "9c4867b1-5cb1-4de0-abeb-df42547bf41e", "ds_serv_man": "黑河计划数据管理中心", "ds_serv_phone": "0931-4967596", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": [ "170.4510" ], "quality_level": 3, "publish_time": "2021-08-16 15:50:21", "last_updated": "2023-09-04 10:33:05", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.Westdc.2020.380", "i18n": { "en": { "title": "Data set of soil particle size distribution in Heihe River Basin", "ds_format": "FLT/TIF", "ds_source": "The source data of this data set comes from the 1:1 million Chinese soil map (and 8595 soil profiles) of the second soil survey.
", "ds_quality": "Good data quality
", "ds_ref_way": "", "ds_abstract": "The source data of this data set comes from the 1:1 million soil map of China (Shi et al., 2004) and 8595 soil profiles of the second soil survey. The distance between the profile and the map spot, the number of soil profiles and soil classification information are considered. Please refer to relevant papers and web pages for specific instructions. Data files include: sand1.flt, clay1.flt – sand and clay content in the surface layer (0-30cm), sand2.flt, clay2.flt – sand and clay content in the bottom layer (30-100cm), psd.hdr – header file, ncols – number of columns, nrows – number of rows, xllcorner – latitude in the lower left corner, yllcorner – longitude in the lower left corner, cellsize – cell size, NoData_ Value - null value, byteorder - lsbfirst, least significant bit first, tiff raster files include: sand1.tif, clay1.tif - sand and clay content in the surface layer (0-30cm) Sand2.tif, clay2.tif - sand and clay content in the bottom layer (30-100cm). Please refer to for data details http://globalchange.bnu.edu.cn/research/soil
", "ds_time_res": "", "ds_acq_place": "Heihe River Basin", "ds_space_res": "1000.0m", "ds_projection": "GCS_Krasovsky_1940", "ds_process_way": "The polygonal connection method was used to connect the soil profile with the soil map, and the content maps of soil sand, silt and clay were obtained
", "ds_ref_instruction": "" } }, "submit_center_id": "ncdc", "data_level": 0, "license_type": "CC BY 4.0", "ds_topic_tags": [ "土壤质地", "土壤", "砂粒，粉粒，粘粒" ], "ds_subject_tags": [ "自然地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "黑河流域" ], "ds_time_tags": [ 2010 ], "ds_contributors": [ { "true_name": "上官微", "email": "shanggv@hotmail.com", "work_for": "北京师范大学", "country": "" }, { "true_name": "戴永久", "email": "yongjiudai@bnu.edu.cn", "work_for": "北京师范大学", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "上官微", "email": "shanggv@hotmail.com", "work_for": "北京师范大学", "country": "" } ], "ds_managers": [ { "true_name": "上官微", "email": "shanggv@hotmail.com", "work_for": "北京师范大学", "country": "" } ], "category": "基础地理" }