本数据集来源于最新发布的ASTER GDEM V3 分幅数据，经过粗差修正、空值填充和水域数值异常剔除等预处理，并采取图像拼接、投影转化、裁剪等步骤，生成了优化的30m分辨率数字高程模型（DEM）。
", "ds_source": "原始DEM数据来自NASA2019年发布的ASTER GDEM V3数据，Geotiff格式，参考大地水准面为WGS84/EGM96。
", "ds_process_way": "将ASTER GDEM V3分幅数据，利用ArcGIS批量处理工具进行格式转换、拼接、裁剪等处理得到30 m分辨率DEM数据。
", "ds_quality": "数据空间分辨率为1弧度秒（约30m）,无效像素值为-9999,海平面数据为0,垂直精度20m，水平精度30m。
", "ds_acq_start_time": "2020-08-01 00:00:00", "ds_acq_end_time": "2020-08-31 00:00:00", "ds_acq_place": "俄罗斯", "ds_acq_lon_east": 118.67166666666667, "ds_acq_lat_south": 41.22805555555556, "ds_acq_lon_west": 28.438333333333333, "ds_acq_lat_north": 81.93833333333333, "ds_acq_alt_low": -162.0, "ds_acq_alt_high": 5857.0, "ds_share_type": "login-access", "ds_total_size": 77129959796, "ds_files_count": 32, "ds_format": "Tiff", "ds_space_res": "30m", "ds_time_res": "", "ds_coordinate": "WGS84", "ds_projection": "GCS_WGS_1984", "ds_thumbnail": "f062ca7d-69d5-4ae5-91e5-3052ac4f1e2e.jpg", "ds_thumb_from": 2, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "", "ds_from_station": null, "organization_id": "52b7b79b-860c-49a5-9083-9a70cf8bed5a", "ds_serv_man": "李红星 ", "ds_serv_phone": "0931-4967592", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": [ "170.3510" ], "quality_level": 3, "publish_time": "2020-11-04 00:49:06", "last_updated": "2025-04-24 16:24:52", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.nieer.2020.1685", "i18n": { "en": { "title": "30m Resolution Digital Elevation Model (DEM) Data of Russia", "ds_format": "Tiff", "ds_source": "The original DEM data originates from NASA's 2019 ASTER GDEM V3 dataset in GeoTIFF format, with WGS84/EGM96 as the vertical datum.
", "ds_quality": "The dataset features a spatial resolution of 1 arc-second (~30m), with invalid pixel values set to -9999, sea level data as 0, vertical accuracy of 20m, and horizontal accuracy of 30m.
", "ds_ref_way": "", "ds_abstract": "This dataset is derived from the latest released ASTER GDEM V3 tiled data. After preprocessing steps including gross error correction, null value filling, and removal of abnormal waterbody values, optimized 30m resolution DEM was generated through image mosaicking, projection transformation, and cropping.
", "ds_time_res": "", "ds_acq_place": "Russia", "ds_space_res": "30m", "ds_projection": "GCS_WGS_1984", "ds_process_way": "The ASTER GDEM V3 tiled data was processed using ArcGIS batch processing tools for format conversion, mosaicking, and cropping to produce the 30m resolution DEM.
", "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, "is_paper_in_submitting": false, "ds_topic_tags": [ "SRTM30", "DEM", "SRTM", "SRTM1", "SRTM3" ], "ds_subject_tags": [ "地球形状学" ], "ds_class_tags": [], "ds_locus_tags": [ "俄罗斯" ], "ds_time_tags": [ 2020 ], "ds_contributors": [ { "true_name": "韩立钦", "email": "hanliqin@lzb.ac.cn", "work_for": "河南师范大学", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "韩立钦", "email": "hanliqin@lzb.ac.cn", "work_for": "河南师范大学", "country": "中国" } ], "ds_managers": [ { "true_name": "韩立钦", "email": "hanliqin@lzb.ac.cn", "work_for": "河南师范大学", "country": "中国" } ], "category": "基础地理" }