本数据集覆盖咸海湖盆及其周边缓冲区域，范围大致包括咸海水体、裸露湖床、阿姆河与锡尔河三角洲尾闾、湖岸阶地及邻近荒漠—绿洲过渡带，用于表征湖盆萎缩背景下的咸海地形起伏格局。\n数据以规则格网形式存储，空间分辨率为5 m ，水平坐标系：GCS_WGS_1984 （EPSG:4326），经纬度，单位为度。高程基准为 EGM96，高程单位为米；主要栅格波段为像元高程值，可扩展提供坡度、坡向、曲率、汇流累积量、地形湿度指数、湖盆分水/集水边界及相对高差等派生产品。\n数据来源于水文地形测量，经过去噪、空洞填补、水域与裸露湖床掩膜、平面—高程基准统一、多源DEM镶嵌与残差校正等处理生成；文件格式为GeoTIFF ，像元类型为Float32，无效值以 -9999标识。
", "ds_source": "数据来源于水文地形测量，经过去噪、空洞填补、水域与裸露湖床掩膜、平面—高程基准统一、多源DEM镶嵌与残差校正等处理生成
", "ds_process_way": "", "ds_quality": "", "ds_acq_start_time": "2019-02-11 00:00:00", "ds_acq_end_time": "2019-02-22 00:00:00", "ds_acq_place": "咸海", "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": "apply-access", "ds_total_size": 26686118730, "ds_files_count": 1, "ds_format": "栅格数据", "ds_space_res": "5米", "ds_time_res": "无", "ds_coordinate": "WGS84", "ds_projection": "WGS84", "ds_thumbnail": "741aa43f-2603-467c-bd97-f7dd9c350db4.png", "ds_thumb_from": 2, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "", "ds_from_station": null, "organization_id": "a5877b42-96ea-4f13-af7e-246f355413d6", "doi_value": "", "subject_codes": [ "170.45" ], "quality_level": 1, "publish_time": "2025-03-26 09:37:54", "first_publish_time": null, "last_updated": "2026-09-24 13:19:16", "protected": false, "protected_to": null, "lang": "zh", "cstr": "33110.11.ariddc.00128", "license": null, "extra": null, "files_shape": [ { "name": "2018年咸海湖盆5米DSM地形数据.rar", "size": 26686118730, "is_dir": false } ], "features": null, "data_level": 0, "i18n": { "en": { "title": "2018 5-meter DSM topography data of the Aral Sea Lake Basin", "ds_abstract": "This dataset covers the Aral Sea lake basin and its surrounding buffer areas, and roughly includes salty water bodies, exposed lake beds, tail of the Amu Darya and Syr Darya delta, lakeshore terraces and adjacent desert-oasis transition zones. It is used to characterize the Aral Sea topography and undulation pattern in the context of lake basin shrinkage.\r\nThe data is stored in the form of a regular grid with a spatial resolution of 5 m, horizontal coordinate system: GCS_WGS_1984 (EPSG:4326), latitude and longitude, in degrees. The elevation benchmark is EGM96, and the elevation unit is meters; the main grid band is the pixel elevation value, which can be extended to provide derivative products such as slope, aspect, curvature, confluence accumulation, terrain humidity index, lake basin water diversion/catchment boundary and relative height difference.\r\nThe data comes from hydrological and topographical survey and is generated through processes such as denoising, void filling, masking of water and exposed lake beds, unification of plane-elevation datum, multi-source DEM mosaic and residual correction; the file format is GeoTIFF, and the pixel type is Float32. Invalid values are identified with-9999.
", "ds_source": "The data comes from hydrological and topographic survey and is generated through processing such as denoising, filling of cavities, masking of water areas and exposed lake beds, unification of plane-elevation datum, multi-source DEM mosaic and residual error correction", "ds_process_way": "", "ds_quality": "", "ds_acq_place": "Aral Sea", "ds_ref_instruction": "", "ds_ref_way": "", "ds_format": "raster data", "ds_projection": "WGS84", "ds_space_res": "", "ds_time_res": "" } }, "license_type": null, "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": [ "数字地表模型", "DSM", "湖盆地形" ], "ds_subject_tags": [ "地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "咸海" ], "ds_time_tags": [ 2018 ], "ds_contributors": [ "刘铁", "李均力" ], "ds_meta_authors": [ "李均力" ], "ds_managers": [ "刘铁", "李均力" ], "category": "DEM数字高程" }