本数据集为1992-2020年7期巴尔喀什湖TM遥感影像数据集，影像成图时间分别是1992、1997、2002、2007、2011、2015、2020共7期，数据由RGB三波段组成，以tiff格式存储，空间分辨率30米。
", "ds_source": "本数据来源于美国地质调局（http://glovis.usgs.gov），包括1987-2019年Landsat TM/ETM+/OLI数据，陆地卫星（Landsat）是美国地球资源卫星系列。是美国用于探测地球资源与环境的系列地球观测卫星系统，曾称作地球资源技术卫星（ERTS）。自1972年7月23日发射陆地卫星1号以来，到1984年3月1日已发射到陆地卫星5号。陆地卫星6发射失败。陆地卫星7（Landsat－7）于1999年4月15日发射升空，至今依然担负着重要任务。在数据产品方面，Landsat－7与Landsat－5的最主要差别有：增加了分辨率为15米的全色波段（PAN波段）；波段6的数据分低增益和高增益数据，分辨率从120米提高到60米。选取的数据满足以下要求：①云覆盖少（云覆盖率<30%）；②阴影较少、色调层次分明；③无噪声。
", "ds_process_way": "下载影像为L1级产品，使用 ENVI软件对影像数据进行波段合并，获得包含6个波段（B、G、R、NIR、SWIR1、SWIR2）的多光谱影像，空间分辨率为30m，最后根据研究区范围对影像进行镶嵌处理，最终形成研究区时间序列影像数据集。
", "ds_quality": "数据时相集中于4-10月，云量范围控制在30%以内，相邻影像之间重叠度约30%，影像信息清晰丰富，不存在噪声、斑点和坏线，影像整体色调均匀、亮度适中。
", "ds_acq_start_time": "2019-01-01 00:00:00", "ds_acq_end_time": "2019-12-31 00:00:00", "ds_acq_place": "巴尔喀什湖三角洲地区", "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": 5359580083, "ds_files_count": 7, "ds_format": "tiff", "ds_space_res": "30", "ds_time_res": "年", "ds_coordinate": "WGS84", "ds_projection": "WGS84", "ds_thumbnail": "99d35b1e-1332-4a89-a5bf-5b703ea83477.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": "2025-04-15 19:08:23", "first_publish_time": null, "last_updated": "2025-04-16 15:45:00", "protected": false, "protected_to": null, "lang": "zh", "cstr": "33110.11.ariddc.00361", "license": null, "extra": null, "files_shape": [ { "name": "Balkhash_DATA_1992.rar", "size": 633590478, "is_dir": false }, { "name": "Balkhash_DATA_1997.rar", "size": 618754339, "is_dir": false }, { "name": "Balkhash_DATA_2002.rar", "size": 631767524, "is_dir": false }, { "name": "Balkhash_DATA_2007.rar", "size": 627260419, "is_dir": false }, { "name": "Balkhash_DATA_2011.rar", "size": 664789327, "is_dir": false }, { "name": "Balkhash_DATA_2015.rar", "size": 1094972938, "is_dir": false }, { "name": "Balkhash_DATA_2020.rar", "size": 1088445058, "is_dir": false } ], "features": null, "data_level": 0, "i18n": { "en": { "title": "1992-2020 Remote sensing image dataset of the Balkhash Lake Delta in 2001", "ds_abstract": "This dataset is a 7-issue TM remote sensing image dataset of Balkhash Lake from 1992 to 2020. The image mapping time is 1992, 1997, 2002, 2007, 2011, 2015, and 2020. The data consists of three RGB bands, stored in tiff format, with a spatial resolution of 30 meters.
", "ds_source": "This data comes from the U.S. Geological Survey (http://glovis.usgs.gov) and includes Landsat TM/ETM+/OLI data from 1987 to 2019. Landsat (Landsat) is a U.S. Earth Resources Satellite series. It is a series of Earth observation satellite systems used by the United States to detect Earth's resources and environment. It was once called the Earth Resources Technology Satellite (ERTS). Since the launch of Landsat 1 on July 23, 1972, Landsat 5 had been launched on March 1, 1984. Landsat 6 launch failed. Landsat-7 was launched on April 15, 1999 and still carries out important tasks. In terms of data products, the main differences between Landsat-7 and Landsat-5 are: the addition of a panchromatic band (PAN band) with a resolution of 15 meters; the data in Band 6 is divided into low-gain and high-gain data, and the resolution is increased from 120 meters to 60 meters. The selected data meets the following requirements: ① Less cloud coverage (cloud coverage rate of 30%);② Less shadows and clear color layers;③ No noise.
", "ds_process_way": "The downloaded image is a L1-level product. ENVI software is used to combine the image data to obtain a multi-spectral image containing 6 bands (B, G, R, NIR, SWIR1, SWIR2) with a spatial resolution of 30m. Finally, the images are mosaically processed according to the scope of the study area, and a time series image dataset of the study area is finally formed.
", "ds_quality": "The data phase is concentrated from April to October, the cloud cover range is controlled within 30%, and the overlap between adjacent images is about 30%. The image information is clear and rich, and there are no noise, spots and bad lines. The overall color of the image is uniform and the brightness is moderate.
", "ds_acq_place": "Balkhash Lake Delta", "ds_format": "tiff", "ds_projection": "WGS84", "ds_space_res": "30", "ds_time_res": "years" } }, "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": [ "湖泊" ], "ds_subject_tags": [ "地理学" ], "ds_class_tags": [], "ds_locus_tags": [], "ds_time_tags": [ 1992, 1997, 2002, 2007, 2011, 2015, 2020 ], "ds_contributors": [ "黄粤", "刘铁" ], "ds_meta_authors": [ "黄粤" ], "ds_managers": [ "刘铁" ], "category": "陆地卫星" }