SRTM（Shuttle Radar Topography Mission）是由NASA和国家地理空间情报局(NGA)合作建的立全球三维图形数据项目。2000年2月，美国“奋进”号航天飞机搭载的SRTM系统对地球北纬60°至南纬57°之间进行了雷达影像数据采集，获取了覆盖全球80%以上的陆地表面的雷达影像数据。经过两年多的处理，制成了数字地形高程模型。
\n\n本数据集包括黑河流域SRTM分幅图和镶嵌图两种数据，其中分幅图为SRTM第4版数据由CGIAR-CSI（国际热带农业中心, http://srtm.csi.cgiar.org/ ）处理，相对于前几个版本具有很大提高包括：1）使用了大量的插值算法，2）使用了更多的辅助DEM数据来填补空白点和空白区，3）相较与第三版数据又偏移了二分之一个像元。镶嵌图是在分副图的基础上通过拼接获得的。
\n\n分副图共包括srtm_56_04,srtm_56_05,srtm_57_04,srtm_57_054幅图，数据是用16位的数值表示高程数值的（-/+/32767米），最大的正高程9000米，负高程（海平面以下12000米）。空数据用-32767标识。每5度经纬度方格划分一个文件，共分为24行（-60至60度）和72列（-180至180度）。
", "ds_source": "黑河流域SRTM分幅图和镶嵌图两种数据
", "ds_process_way": "插值算法
", "ds_quality": "数据质量良好
", "ds_acq_start_time": "2000-01-01 00:00:00", "ds_acq_end_time": "2000-12-31 00:00:00", "ds_acq_place": "黑河流域", "ds_acq_lon_east": 104.19972222222222, "ds_acq_lat_south": 37.7, "ds_acq_lon_west": 96.06666666666666, "ds_acq_lat_north": 43.266666666666666, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "login-access", "ds_total_size": 228472764, "ds_files_count": 3, "ds_format": "栅格数据", "ds_space_res": "90.0m", "ds_time_res": "", "ds_coordinate": "WGS84", "ds_projection": "+proj=longlat +datum=WGS84 +no_defs ", "ds_thumbnail": "902c7afe-5fcf-4b29-b435-0b9c890c388c.png", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "本数据来源于美国航空航天局（NASA）热带农业国际中心（CITA）,由黑河计划数据管理中心收集整理，用户在使用数据时请在正文中明确声明数据的来源,并在致谢中提及本数据中心。", "ds_from_station": null, "organization_id": "9c4867b1-5cb1-4de0-abeb-df42547bf41e", "ds_serv_man": "黑河计划数据管理中心", "ds_serv_phone": "0931-4967287", "ds_serv_mail": "westdc@lzb.ac.cn", "doi_value": "", "subject_codes": [ "170.4510" ], "quality_level": 3, "publish_time": "2020-12-18 14:52:19", "last_updated": "2023-08-23 16:46:56", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.Westdc.2020.462", "i18n": { "en": { "title": "The SRTM DEM dataset in the Black River Basin", "ds_format": "Raster data", "ds_source": "Two kinds of data of SRTM and mosaic map in Heihe River Basin
", "ds_quality": "Good data quality
", "ds_ref_way": "", "ds_abstract": "SRTM (Shuttle Radar topology mission) is a global 3D graphics data project jointly established by NASA and National Geospatial Intelligence Agency (NGA). In February 2000, the SRTM system of the U.S. space shuttle Endeavour collected radar image data between 60 ° N and 57 ° s, and obtained radar image data covering more than 80% of the world's land surface. After more than two years of processing, a digital terrain elevation model is made.
\nThis data set includes two kinds of data: SRTM sub map and mosaic map of Heihe River Basin, in which the sub map is the data of SRTM version 4, which is compiled by cgiar-csi (International Tropical Agriculture Center, Http://srtm.csi.cgiar.org/) processing, compared with the previous versions, has greatly improved: 1) a large number of interpolation algorithms are used, 2) more auxiliary DEM data are used to fill in the white spots and blank areas, 3) compared with the data of the third version, the image element is offset by one-half. Mosaic is obtained by splicing on the basis of sub graphs.
\nThe sub maps include srtm～04, SRTM ᦉ 05, SRTM ᦉ 04, SRTM ᦉ 57 ᦉ 054 maps. The data are 16 digit values representing the elevation value (- / + / 32767 m), the maximum positive elevation is 9000 m, and the negative elevation is 12000 m below sea level. Empty data is identified with - 32767. A file is divided into 24 lines (- 60 to 60 degrees) and 72 columns (- 180 to 180 degrees) every 5 degrees of longitude and latitude.
", "ds_time_res": "", "ds_acq_place": "Heihe River Basin", "ds_space_res": "90.0m", "ds_projection": "+proj=longlat +datum=WGS84 +no_defs ", "ds_process_way": "Interpolation algorithm
", "ds_ref_instruction": "This data is from the International Center for Tropical Agriculture (CITA) of NASA. It is collected and collated by the data management center of Heihe project. When users use the data, please clearly state the data source in the text and mention this data center in the acknowledgment." } }, "submit_center_id": "ncdc", "data_level": 0, "recommendation_value": 0, "license_type": "https://creativecommons.org/licenses/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": [ "数字高程模型", "镶嵌图", "SRTM", "DEM" ], "ds_subject_tags": [ "自然地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "黑河流域" ], "ds_time_tags": [ 2000 ], "ds_contributors": [ { "true_name": "黑河计划数据管理中心", "email": "westdc@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "" } ], "ds_meta_authors": [ { "true_name": "黑河计划数据管理中心", "email": "westdc@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "" } ], "ds_managers": [ { "true_name": "黑河计划数据管理中心", "email": "westdc@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "" } ], "category": "基础地理" }