本数据是2000年咸海湖盆DSM地形数据，是由SRTM数据和20世纪60年代咸海1:500000地形图合成得到，空间分辨率30米，平面基准采用WGS84大地坐标系，高程基准基于EGM96地球重力模型。
", "ds_source": "SRTM数据(https://earthexplorer.usgs.gov/)和20世纪60年代咸海1:500000地形图。
", "ds_process_way": "将1:500000地形图重新投影到WGS84北基准面上的UTM 40区上。基于克里金法，采用球面半变异函数建模并通过双线性插值，生成30 m空间分辨率的湖区栅格数字高程A，再以40m-60m区域高程与SRTM数据集比较，求解出此区域的两套数据集高程相对偏差，以此偏差湖区栅格数字高程A修订40m以下高程，再将此两套数据集融合。
", "ds_quality": "原数据空间分辨率为30m，加工后空间分辨率为30m，统计水位-面积-体积曲线与文献报道数值R2达到0.99。
", "ds_acq_start_time": "2000-02-11 00:00:00", "ds_acq_end_time": "2000-02-22 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": "30", "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": "2025-03-26 09:37:54", "protected": false, "protected_to": null, "lang": "zh", "cstr": "33110.11.ariddc.00128", "license": null, "extra": null, "files_shape": [ { "name": "2000年咸海湖盆30米DSM地形数据.rar", "size": 26686118730, "is_dir": false } ], "features": null, "data_level": 0, "i18n": { "en": { "title": "DSM Topographic Data of 30-Meters in the Aral Sea Basin in 2000", "ds_abstract": "This data is DSM topography data of the Aral Sea Lake Basin in 2000. It is synthesized from SRTM data and the 1:500000 topography map of the Aral Sea in the 1960s. The spatial resolution is 30 meters. The plane datum adopts the WGS84 geodetic coordinate system, and the elevation datum is based on the EGM96 Earth Gravity Model.
", "ds_source": "SRTM data (https://earthexplorer.usgs.gov/) and a 1:500000 topographic map of the Aral Sea in the 1960s.
", "ds_process_way": "Re-project the 1:500000 topographic map onto UTM 40 area on the WGS84 North Datum. Based on the Kriging method, spherical semivariogram modeling is used and bilinear interpolation is used to generate the lake area grid digital elevation A with a spatial resolution of 30m. Then the 40m-60m regional elevation is compared with the SRTM dataset to solve the relative height deviation of the two sets of data sets in this area. Using this deviation, the lake area grid digital elevation A is revised to the elevation below 40m, and then the two sets of data sets are merged.
", "ds_quality": "The spatial resolution of the original data is 30m, and the spatial resolution after processing is 30m. The statistical water-area-volume curve and the literature reported value R2 reach 0.99.
", "ds_acq_place": "Aral Sea", "ds_format": "raster data", "ds_projection": "WGS84", "ds_space_res": "30", "ds_time_res": "no" } }, "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": [ 2000 ], "ds_contributors": [ "刘铁", "罗毅", "孙林" ], "ds_meta_authors": [ "孙林" ], "ds_managers": [ "刘铁" ], "category": "DEM数字高程" }