{ "created": "2023-10-17 16:14:47", "updated": "2026-05-06 07:23:08", "id": "ce37070c-315d-4f22-a158-6fd1e9674153", "version": 7, "ds_topic": null, "title_cn": "北极圈土地覆盖情况(CALC-2020 年)", "title_en": "Circumpolar Arctic Land Cover for circa 2020 (CALC-2020)", "ds_abstract": "

  2020年北极圈土地覆盖物（CALC-2020）是一个新的基准土地覆盖物产品，以 10 米的分辨率绘制整个北极陆地（树线以下）。\n

\n

  CALC-2020 产品以六个独立的 TIFF 文件形式提供。每个文件在空间上覆盖一个北极国家/地区，包括阿拉斯加（AK）、加拿大（CA）、格陵兰（GR）、冰岛（IC）、挪威（NO）和俄罗斯（RU）。CALC-2020 的图例包括十个通用类别，可恰当描述整个北极地区的地貌：耕地 (01)、森林 (02)、禾本科苔原 (03)、灌木苔原 (04)、湿地 (05)、开阔水域 (06)、地衣/苔藓 (07)、人造不透水层 (08)、荒地 (09)、冰/雪 (10)。

", "ds_source": "

  该数据集来自 Sentinel-1/2 和 ArcticDEM.

", "ds_process_way": "

  该数据集来自 Sentinel-1/2 和 ArcticDEM，使用的是经过 58,000 多个站点样本训练的本地自适应机器学习模型。

", "ds_quality": "

  数据质量良好.

", "ds_acq_start_time": "2020-01-01 00:00:00", "ds_acq_end_time": "2020-12-31 00:00:00", "ds_acq_place": "北极", "ds_acq_lon_east": null, "ds_acq_lat_south": null, "ds_acq_lon_west": null, "ds_acq_lat_north": null, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "open-access", "ds_total_size": 7574244511, "ds_files_count": 7, "ds_format": ".tif", "ds_space_res": "10m", "ds_time_res": "", "ds_coordinate": "无", "ds_projection": "", "ds_thumbnail": "ce37070c-315d-4f22-a158-6fd1e9674153.jpg", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "用户在使用数据时请在正文中明确声明数据的来源，并在参考文献部分引用本元数据提供的引用方式。", "ds_from_station": null, "organization_id": "d2c052ce-d283-4a48-8962-6a3dbcb03b8e", "ds_serv_man": "敏玉芳", "ds_serv_phone": "0931-4967596", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": [ "170.45" ], "quality_level": 3, "publish_time": "2023-10-23 11:43:17", "last_updated": "2025-05-29 11:22:00", "protected": false, "protected_to": null, "lang": "zh", "cstr": "https://cstr.cn/31253.11.sciencedb.01869", "i18n": { "en": { "title": "Circumpolar Arctic Land Cover for circa 2020 (CALC-2020)", "ds_format": ".tif", "ds_source": "

  This dataset is derived from Sentinel-1/2 and ArcticDEM.

", "ds_quality": "

  The data quality is good

", "ds_ref_way": "", "ds_abstract": "

  Circumpolar Arctic Land Cover for circa 2020 (CALC-2020) is a new baseline land cover product that maps the entire terrestrial Arctic (tree line nowthward) at 10m resolution.\n

\n

  The CALC-2020 product is delivered as six independent TIFF files. Each of them spatially covers one of Arctic countries/regions including Alaska (AK), Canada (CA), Greenland (GR), Iceland (IC), Norway (NO), and Russia (RU). The CALC-2020's legend includes ten generic classes that appropriately describe landscapes across the Arctic: Cropland (01), Forest (02), Graminoid tundra (03), Shrub tundra (04), Wetland (05), Open water (06), Lichen/moss (07), Man-made imperviousness (08), Barren land (09), Ice/snow (10).

", "ds_time_res": "", "ds_acq_place": "arctic", "ds_space_res": "10m", "ds_projection": "", "ds_process_way": "

  This dataset is derived from Sentinel-1/2 and ArcticDEM, using locally adaptive machine learning models trained by sample over 58,000 site locations.

", "ds_ref_instruction": "When using data, please clearly state the source of the data in the main text and cite the citation provided by this metadata in the reference section." } }, "submit_center_id": "ncdc", "data_level": 0, "license_type": "CC BY 4.0", "doi_reg_from": "reg_outside", "cstr_reg_from": "reg_outside", "doi_not_reg_reason": null, "cstr_not_reg_reason": null, "is_paper_in_submitting": false, "ds_topic_tags": [ "极地北极", "土地覆被", "10m空间分辨率", "遥感" ], "ds_subject_tags": [ "地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "北极" ], "ds_time_tags": [ 2020 ], "ds_contributors": [ { "true_name": "刘冲", "email": "liuc@mail.sysu.edu.cn", "work_for": "中山大学", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "刘冲", "email": "liuc@mail.sysu.edu.cn", "work_for": "中山大学", "country": "中国" } ], "ds_managers": [ { "true_name": "刘冲", "email": "liuc@mail.sysu.edu.cn", "work_for": "中山大学", "country": "中国" } ], "category": "基础地理" }