本数据集包含2019年塔吉克斯坦Luchob、Blakhi生态样方正射影像数据，投影坐标系统采用WGS_1984_UTM_Zone_42N，比例尺1:500，Luchob测区飞行面积5.5km2，航摄分辨率6cm，Blakhi测区飞行面积15.8 km2，航摄分辨率7cm，数据覆盖样地和旁边的村落。
", "ds_source": "原始无人机数据采集工作由塔吉克斯坦科学院Mustafo·Safarov和助手Azaz于2019年5月31日至2019年6月1日共同完成。
", "ds_process_way": "1、无人机数据采集过程：\n飞行采用电动固定翼无人机，搭载可见光航摄仪Sony RX-1R，镜头焦距35mm，像元尺寸：5.9μm；地面分辨率0.1m，相对飞行高度480m至720m，重叠度航向60%，旁向80%。\n2、正射影像数据处理过程：\n将原始无人机影像数据进行数据整理，将解算好的POS数据放入PIX4D软件中进行影像匹配和自由网空三加密计算，生成密集点云，然后基于密集点云数据生成数字表面模型（DSM），最后通过正射纠正和镶嵌处理生成测区的数字正射影像(DOM)，数据成果没有做分幅处理。\n
", "ds_quality": "无人机采集过程遵守《低空数字航摄与数据处理规范GB/T 39612-2020》；\n数据处理过程遵守《CH/T 9008.3 - 基础地理信息数字成果 1∶500 1∶1 000 1∶2 000 数字正射影像图》和《GB/T 39608 - 基础地理信息数字成果元数据》。\n
", "ds_acq_start_time": "2019-05-31 00:00:00", "ds_acq_end_time": "2019-06-01 00:00:00", "ds_acq_place": "塔吉克斯坦Blakhi和Luchob样地", "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": 16043648430, "ds_files_count": 2, "ds_format": "栅格数据", "ds_space_res": "0.6", "ds_time_res": "月", "ds_coordinate": "WGS84", "ds_projection": "UTM", "ds_thumbnail": "40f85e4f-5f76-4c85-bece-a6ea3e2b511f.png", "ds_thumb_from": 0, "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": "2025-03-21 18:54:03", "first_publish_time": null, "last_updated": "2025-03-22 18:56:52", "protected": false, "protected_to": null, "lang": "zh", "cstr": "33110.11.ariddc.00117", "license": null, "extra": null, "files_shape": [ { "name": "TJK_Blakhi_20190531-data.rar", "size": 11569525771, "is_dir": false }, { "name": "TJK_Luchob_20190601-data.rar", "size": 4474122659, "is_dir": false } ], "features": null, "data_level": 0, "i18n": { "en": { "title": "2019 Tajikistan grassland ecological sample drone remote sensing orthophoto image dataset", "ds_abstract": "This dataset contains square projection image data of the Luchob and Blakhi ecological samples in Tajikistan in 2019. The projection coordinate system uses WGS_1984_UTM_Zone_42N, the scale is 1:500, the flying area of the Luchob survey area is 5.5km2, the aerial photo resolution is 6 cm, the flying area of the Blakhi survey area is 15.8km2, and the aerial photo resolution is 7cm. The data covers the sample sites and nearby villages.
", "ds_source": "The original drone data collection was jointly completed by Mustafo Safarov of the Tajik Academy of Sciences and assistant Azaz from May 31, 2019 to June 1, 2019.
", "ds_process_way": "1. UAV data collection process:\nThe flight uses an electric fixed-wing drone with a visible light aerial camera Sony RX-1R. The lens focal length is 35mm, and the pixel size is 5.9μm; the ground resolution is 0.1 m, the relative flight altitude is 480m to 720m, and the overlap degree is 60% in heading and 80% in lateral direction.\n2. Ortho image data processing process:\nThe original drone image data is sorted out, and the solved POS data is put into PX4D software for image matching and free network space-triple encryption calculation to generate dense point clouds. Then a digital surface model is generated based on the dense point cloud data.(DSM), and finally a digital orthophoto image (DOM) of the survey area is generated through orthorectification and mosaic processing. The data results are not subjected to framing processing.\n
", "ds_quality": "The drone collection process complies with the \"Low-altitude Digital Aerial Photography and Data Processing Specification GB/T 39612-2020\";\nThe data processing process complies with \"CH/T 9008.3 -Basic Geographical Information Digital Achievements 1:500 1:1 000 1:2 000 Digital Ortho Map\" and \"GB/T 39608 -Basic Geographical Information Digital Achievements Metadata\".\n
", "ds_acq_place": "Blakhi and Luchob sites in Tajikistan", "ds_format": "raster data", "ds_projection": "UTM", "ds_space_res": "0.6", "ds_time_res": "months" } }, "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": [ "正射影像", "低空航摄", "无人机" ], "ds_subject_tags": [ "地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "塔吉克斯坦" ], "ds_time_tags": [ 2019 ], "ds_contributors": [ "王伟胜", "李耀明" ], "ds_meta_authors": [ "李锦" ], "ds_managers": [ "李耀明" ], "category": "无人机遥感" }