观测时间为2008-06-05～2008-06-15日。以大野口关滩森林站超级样地为起点，穿越超级样地，设置了一条长度为1Km，宽为20m的样带。利用罗盘仪确定样带走向，方位角为北偏东115度，与飞行航线基本一致。在样带上每隔50米布设20米×20米的样地一块，共20块样地。样带与超级样地有部分重合，样带上的1号样地中心位于超级样地的中心，其观测数据参见超级样地每木测量数据集。本数据集记录了2～20号样地的观测数据。这些数据包括以下3部分：\n
\n1）样地测树数据：分别对2～20样地每木测量：胸径、树高、冠幅和枝下高。采用激光测高仪和超声波测高仪测量大树高、枝下高，用花杆测量小树高、枝下高，用胸径尺测量林木胸径，用皮卷尺测量冠幅。\n
\n2）样地定位数据：利用皮尺和罗盘粗略确定样地位置，样地中心点坐标精确测量采用法国泰雷兹（THALES） DGPS测量系统，型号为Z-MAX。观测方法是使用两台GPS接收机进行同步静态测量，一台安置在参考站，一台安置在流动站，观测时长30分钟，通过系统自带的数据处理软件进行事后差分处理，定位结果的大地坐标系统为WGS84。\n
\n3）LAI观测数据：利用LAI-2000和HemiView进行了每块样地的叶面积指数（LAI）测量。
", "ds_source": "利用罗盘仪确定样带走向，方位角为北偏东115度，与飞行航线基本一致。在样带上每隔50米布设20米×20米的样地一块，共20块样地。样带与超级样地有部分重合，样带上的1号样地中心位于超级样地的中心，其观测数据参见超级样地每木测量数据集。", "ds_process_way": "
采用激光测高仪和超声波测高仪测量大树高、枝下高，用花杆测量小树高、枝下高，用胸径尺测量林木胸径，用皮卷尺测量冠幅；样地定位数据：利用皮尺和罗盘粗略确定样地位置，样地中心点坐标精确测量采用法国泰雷兹（THALES） DGPS测量系统，型号为Z-MAX。观测方法是使用两台GPS接收机进行同步静态测量，一台安置在参考站，一台安置在流动站，观测时长30分钟，通过系统自带的数据处理软件进行事后差分处理，定位结果的大地坐标系统为WGS84。
", "ds_quality": "数据质量良好
", "ds_acq_start_time": "2008-12-16 00:00:00", "ds_acq_end_time": "2008-12-26 00:00:00", "ds_acq_place": "黑河流域,大野口流域加密观测区,森林水文试验区,大野口关滩森林站森林样带", "ds_acq_lon_east": 100.2875, "ds_acq_lat_south": 38.46666666666667, "ds_acq_lon_west": 100.30333333333333, "ds_acq_lat_north": 38.666666666666664, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "apply-access", "ds_total_size": 261282818, "ds_files_count": 2, "ds_format": "excel", "ds_space_res": null, "ds_time_res": "分、日、次", "ds_coordinate": "WGS84", "ds_projection": "", "ds_thumbnail": "68d6493c-7420-415a-a97b-ae467c55904a.png", "ds_thumb_from": 0, "ds_ref_way": "陈尔学, 过志峰, 刘清旺, 杨永恬，黑河综合遥感联合试验：大野口关滩森林站森林样带调查数据集（2008年），国家冰川冻土沙漠科学数据中心(www.ncdc.ac.cn)，2019，doi：10.12072/ncdc.NIEER.db1887.2022", "paper_ref_way": "", "ds_ref_instruction": "本数据由“黑河综合遥感联合试验”产生，其中差分GPS数据仅限于项目使用，不对外共享。用户在使用数据时请在正文中明确声明数据的来源，并在参考文献部分引用本元数据提供的引用方式。", "ds_from_station": null, "organization_id": "14df1d8b-6362-4c0f-b88e-b46d4abe5db9", "ds_serv_man": "敏玉芳", "ds_serv_phone": "0931-4967596 ", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "10.12072/ncdc.NIEER.db1887.2022", "subject_codes": null, "quality_level": 3, "publish_time": "2022-03-15 17:03:11", "last_updated": "2022-03-15 17:03:11", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.Westdc.2021.821", "i18n": { "en": { "title": "Heihe River Integrated Remote Sensing joint experiment: Forest transect survey data set of Dayekou guantan forest station (2008)", "ds_format": "", "ds_source": "The compass is used to determine the strike of the transect, and the azimuth is 115 degrees north by East, which is basically consistent with the flight route. 20m shall be arranged on the sample strip every 50m × A 20 meter sample plot, a total of 20 samples. The transect partially overlaps with the super transect. The center of No. 1 transect on the transect is located in the center of the super transect. See the measurement data set of each wood of the super transect for its observation data.", "ds_quality": "
Good data quality
", "ds_ref_way": "", "ds_abstract": "The observation time is from June 5, 2008 to June 15, 2008. Taking the super sample plot of Dayekou guantan forest station as the starting point and crossing the super sample plot, a sample belt with a length of 1km and a width of 20m is set. The compass is used to determine the strike of the transect, and the azimuth is 115 degrees north by East, which is basically consistent with the flight route. 20m shall be arranged on the sample strip every 50m × A 20 meter sample plot, a total of 20 samples. The transect partially overlaps with the super transect. The center of No. 1 transect on the transect is located in the center of the super transect. See the measurement data set of each wood of the super transect for its observation data. This data set records the observation data of sample plots 2 ~ 20. These data include the following three parts:\n
\n1) Tree measurement data of sample plots: measure DBH, tree height, crown width and height under branches of each tree in 2 ~ 20 sample plots respectively. Use laser altimeter and ultrasonic altimeter to measure the height of big trees and under branches, use flower stems to measure the height of small trees and under branches, use DBH ruler to measure the DBH of trees, and use leather tape to measure the crown width.\n
\n2) Sample location data: the sample location is roughly determined by tape measure and compass. The coordinates of the center point of the sample are accurately measured by the French Thales DGPS measurement system, with the model of z-max. The observation method is to use two GPS receivers for synchronous static measurement, one at the reference station and the other at the mobile station. The observation time is 30 minutes. The post differential processing is carried out through the system's own data processing software. The geodetic coordinate system of the positioning result is WGS84.\n
\n3) Lai observation data: LAI-2000 and hemiview were used to measure the leaf area index (LAI) of each sample plot
", "ds_time_res": "分、日、次", "ds_acq_place": "Heihe River Basin, Dayekou basin intensive observation area, forest hydrological test area, forest transect of Dayekou guantan forest station", "ds_space_res": "", "ds_projection": "", "ds_process_way": "Use laser altimeter and ultrasonic altimeter to measure the height of big trees and under branches, use flower stems to measure the height of small trees and under branches, use DBH ruler to measure the DBH of trees, and use leather tape to measure the crown width; Sample location data: the sample location is roughly determined by tape measure and compass. The coordinates of the center point of the sample are accurately measured by the French Thales DGPS measurement system, with the model of z-max. The observation method is to use two GPS receivers for synchronous static measurement, one at the reference station and the other at the mobile station. The observation time is 30 minutes. The post differential processing is carried out through the system's own data processing software. The geodetic coordinate system of the positioning result is WGS84", "ds_ref_instruction": " " } }, "submit_center_id": "ncdc", "data_level": 0, "license_type": "CC 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": [ "植被", "生物量", "森林" ], "ds_subject_tags": [ "自然地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "黑河流域", "大野口流域加密观测区", "森林水文试验区", "大野口关滩森林站森林样带" ], "ds_time_tags": [ 2008 ], "ds_contributors": [ { "true_name": "陈尔学", "email": "chenerx@caf.ac.cn", "work_for": "中国林业科学院资源信息研究所", "country": "中国" }, { "true_name": "过志峰", "email": "zhifeng_guo@hotmail.com", "work_for": "中国科学院遥感应用研究所", "country": "中国" }, { "true_name": "刘清旺", "email": "liuqw@caf.ac.cn", "work_for": "中国林业科学研究院", "country": "中国" }, { "true_name": "杨永恬", "email": "forevert@sina.com", "work_for": "中国林业科学研究院", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "陈尔学", "email": "chenerx@caf.ac.cn", "work_for": "中国林业科学院资源信息研究所", "country": "中国" } ], "ds_managers": [ { "true_name": "陈尔学", "email": "chenerx@caf.ac.cn", "work_for": "中国林业科学院资源信息研究所", "country": "中国" } ], "category": "遥感及产品" }