分类原则：天然草场类型的形成、发展和演变，受生态环境和人类的经济活动(包括放牧、 开垦、樵柴等)所制约，因此，草场分类中必须考虑自然条件和社会经济两个方面。具体原则 参照土地里类型划分的综合性因素、 主导性因素和生产应用相结合的三原则进行分类。主要属性信息说明：草场类（MAINTYPE）：一级分类草场亚类（TYPE）：二级分类，也称为组，草场型（SUBTYPE）：三级分类，以植被的特征种或建群种表示。
", "ds_source": "重点牧区草场资源调查大纲和技术规程
", "ds_process_way": "景观法为主， 按地貌、土壤 、植被三要素的综合进行划分，即在自然地带的基础上，根据地貌、 土壤、植被三个主导分异因素进行逐级划分。
", "ds_quality": "主要根据1981年北方草场资源调查办公室拟定的《重点牧区草场资源调查大纲和技术规程》的要求，结合本区草场的实际情况进行分类。
", "ds_acq_start_time": "2007-01-01 00:00:00", "ds_acq_end_time": "2007-12-31 00:00:00", "ds_acq_place": "黑河流域", "ds_acq_lon_east": 102.12722222222222, "ds_acq_lat_south": 37.74722222222222, "ds_acq_lon_west": 97.40972222222223, "ds_acq_lat_north": 42.678888888888885, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "login-access", "ds_total_size": 2278419, "ds_files_count": 2, "ds_format": "shp", "ds_space_res": "/", "ds_time_res": "/", "ds_coordinate": "WGS84", "ds_projection": "/", "ds_thumbnail": "826c6110-d875-43dd-b9e8-9dc64e42cefc.png", "ds_thumb_from": 2, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "", "ds_from_station": null, "organization_id": "9c4867b1-5cb1-4de0-abeb-df42547bf41e", "ds_serv_man": "李红星", "ds_serv_phone": "0931-4967592", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": [ "170.4510" ], "quality_level": 3, "publish_time": "2020-12-10 00:58:26", "last_updated": "2025-04-27 15:51:47", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.Westdc.2020.782", "i18n": { "en": { "title": "1:1 million grassland distribution data set in Heihe River Basin", "ds_format": "shp", "ds_source": "Outline and technical regulations of grassland resources investigation in key pastoral areas
", "ds_quality": "According to the requirements of \"outline and technical regulations for grassland resources investigation in key pastoral areas\" drawn up by the northern grassland resources investigation office in 1981, and combined with the actual situation of grassland in this area, the classification is carried out.
", "ds_ref_way": "", "ds_abstract": "Classification principle: the formation, development and evolution of natural grassland types are restricted by ecological environment and human economic activities (including grazing, reclamation, firewood and so on). Therefore, natural conditions and social economy must be considered in grassland classification. The specific principles refer to the three principles of comprehensive factors, dominant factors and production application of land classification. Main attribute information description: maintype: primary classification; type: secondary classification, also known as group; subtype: Tertiary classification, represented by characteristic species or constructive species of vegetation.
", "ds_time_res": "/", "ds_acq_place": "Heihe River Basin", "ds_space_res": "/", "ds_projection": "/", "ds_process_way": "Based on the landscape method, it is divided according to the three elements of landform, soil and vegetation, that is, based on the natural zone, it is divided step by step according to the three dominant differentiation factors of landform, soil and vegetation.
", "ds_ref_instruction": "" } }, "submit_center_id": "ncdc", "data_level": 0, "license_type": "CC BY 4.0", "doi_reg_from": "reg_local", "cstr_reg_from": "reg_local", "doi_not_reg_reason": null, "cstr_not_reg_reason": null, "ds_topic_tags": [ "草场分布", "放牧", "草场类", "草场亚类", "草场型" ], "ds_subject_tags": [ "自然地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "黑河流域" ], "ds_time_tags": [ 2007 ], "ds_contributors": [ { "true_name": "吴立宗", "email": "wulizong@pric.org.cn", "work_for": "国家极地科学数据中心", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "盖春梅", "email": "Gechm@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "中国" } ], "ds_managers": [ { "true_name": "李红星", "email": "lihongxing@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "中国" } ], "category": "基础地理" }