铁路分布图是制图过程中的基础数据，为了便于用户使用，我们根据国家基础地理信息中心分发的铁路数据集、甘肃省地图地理信息中心编制的《甘肃省地图册》、中国测绘局公布的天地图和谷歌地图等数据汇编了黑河流域铁路数据集。该数据基本反映了黑河流域周边地区2010年前后的铁路分布现状。
\n\n铁路编码采用国家基础地理信息系统数据分类编码国家标准-《国土基础信息数据分类与代码》（GB /T 13923-92），代码为五位数字码(国家基础地理信息中心 2010)。
", "ds_source": "国家基础地理信息中心分发的铁路数据集、甘肃省地图地理信息中心编制的《甘肃省地图册》、中国测绘局公布的天地图和谷歌地图
", "ds_process_way": "数字矢量化
", "ds_quality": "铁路编码采用国家基础地理信息系统数据分类编码国家标准-《国土基础信息数据分类与代码》（GB /T 13923-92），代码为五位数字码(国家基础地理信息中心 2010)。
", "ds_acq_start_time": "2009-01-01 00:00:00", "ds_acq_end_time": "2009-12-31 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": 399414, "ds_files_count": 3, "ds_format": "矢量", "ds_space_res": null, "ds_time_res": "", "ds_coordinate": "WGS84", "ds_projection": "+proj=longlat +datum=WGS84 +no_defs ", "ds_thumbnail": "1ae52a03-31b2-46e2-8439-c375fbc19cfc.png", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "", "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": "0931-4967287", "ds_serv_mail": "westdc@lzb.ac.cn", "doi_value": "", "subject_codes": [ "170.4520" ], "quality_level": 3, "publish_time": "2020-12-18 15:00:03", "last_updated": "2023-08-23 16:46:35", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.Westdc.2020.563", "i18n": { "en": { "title": "Rail map of Heihe River Basin", "ds_format": "Vector", "ds_source": "The railway dataset distributed by the National Basic Geographic Information Center, the \"Gansu Provincial Atlas\" compiled by the Gansu Provincial Map Geographic Information Center, the sky map and Google map published by the China Surveying and Mapping Bureau
", "ds_quality": "The railway coding adopts the national standard for basic geographic information system data classification and coding - \"Classification and Coding of Land Basic Information Data\" (GB/T 13923-92), with a five digit code (National Basic Geographic Information Center 2010)
", "ds_ref_way": "", "ds_abstract": "The railway distribution map is the basic data in the mapping process. For the convenience of users, we compiled the railway dataset of the Heihe River Basin based on the railway dataset distributed by the National Basic Geographic Information Center, the \"Gansu Provincial Atlas\" compiled by the Gansu Provincial Map Geographic Information Center, and the Tian Map and Gu Ge Map published by the China Surveying and Mapping Bureau. This data basically reflects the distribution status of railways in the surrounding areas of the Heihe River Basin around 2010
\nThe railway coding adopts the national standard for basic geographic information system data classification and coding - \"Classification and Coding of Land Basic Information Data\" (GB/T 13923-92), with a five digit code (National Basic Geographic Information Center 2010)
", "ds_time_res": "", "ds_acq_place": "Heihe River Basin", "ds_space_res": "", "ds_projection": "+proj=longlat +datum=WGS84 +no_defs ", "ds_process_way": "Digital vectorization
", "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": [ "铁路", "基础地理", "黑河流域" ], "ds_subject_tags": [ "人文地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "黑河流域" ], "ds_time_tags": [ 2009 ], "ds_contributors": [ { "true_name": "黑河计划数据管理中心", "email": "westdc@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "" } ], "ds_meta_authors": [ { "true_name": "黑河计划数据管理中心", "email": "westdc@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "" } ], "ds_managers": [ { "true_name": "黑河计划数据管理中心", "email": "westdc@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "" } ], "category": "基础地理" }