电竞战队全球合作网络空间结构及其影响因素

通过对英雄联盟全球总决赛、Dota2国际邀请赛和CS:GO Major三大国际性电竞赛事中参与战队成员信息的采集,运用社会网络分析方法探索跨国电竞战队合作网络的结构特征及演化趋势,在此基础上采用引力模型方法从多维邻近性和国家属性2个维度揭示影响电竞赛事合作网络的主要因素。结果表明：1）全球电竞合作网络的空间演化总体呈现快速扩张的态势和低密度、弱关联、强动态性的网络特征,节点数量快速增多的同时网络密度呈现出波动下降的趋势;2）全球电竞合作网络呈现较为明显的社团化特征,5大社团规模差异悬殊且处于不断分裂整合的演化过程,中国电竞战队的网络中心性不断提升但尚未占据中心位置;3）社会邻近性、组织邻近性是推动电竞合作网络形成的主要因素,而科研支出、电竞收入和电竞实力则是影响国家在电竞合作网络中重要性的关键要素。     

中国地理空间框架建设的内容与进展

正地理空间框架是当今测绘工作的主要活动和主要内容。地理空间框架究竟是些什么内容?实际上,它是对地理信息数据进行采集加工,或者交换、服务的活动,以及与这些活动相关的法规、标准、基础设施的一个总称。也就是说,在政策标准各方面的支持下,建立相应的机制,在相关技术的支撑下,通过人和设备。设施,向社会各方面提供地理信息的服务。地理空间框架也是当今测     

Volume estimation of small scale debris flows based on observations of topographic changes using airborne LiDAR DEMs

This paper describes a geographic information system(GIS)-based method for observing changes in topography caused by the initiation, transport, and deposition of debris flows using highresolution light detection and ranging(LiDAR) digital elevation models(DEMs) obtained before and after the debris flow events. The paper also describes a method for estimating the volume of debris flows using the differences between the LiDAR DEMs. The relative and absolute positioning accuracies of the LiDAR DEMs were evaluated using a real-time precise global navigation satellite system(GNSS) positioning method. In addition, longitudinal and cross-sectional profiles of the study area were constructed to determine the topographic changes caused by the debris flows. The volume of the debris flows was estimated based on the difference between the LiDAR DEMs. The accuracies of the relative and absolute positioning of the two LiDAR DEMs were determined to be ±10 cm and ±11 cm RMSE, respectively, which demonstrates the efficiency of the method for determining topographic changes at an scale equivalent to that of field investigations. Based on the topographic changes, the volume of the debris flows in the study area was estimated to be 3747 m3, which is comparable with the volume estimated based on the data from field investigations.     

Recent Changes Occurred in the Terminus of the Debris-covered Bilafond Glacier in the Karakoram Himalayas Using Remotely Sensed Images and Digital Elevation Models (1978-2011)

Recent changes occurred in terminus of the debris-covered Bilafond Glacier in the Karakoram Range in the Himalayas, Northern Pakistan was investigated in this research. Landsat MSS, TM and ETM＋ images were used for this study. Digital elevation models derived from ASTER GDEM and SRTM were also utilized. Visible, infrared and thermal infrared channels were utilized in order to get accurate glacier change maps. Three methods were tried to map this debris-covered glacier in this research. The glacier has been mapped successfully and the changes in the glacier terminus from 1978 to 2011 have been calculated. Manual, semi-automatic and thermal methods were found to give similar results. It was found that the glacier has undergone serious ablation during this period despite of the fact that many of the larger glaciers in the Hindu Kush and Karakoram mountain regions in the Upper Indus Basin were reported to be expanding. The terminus has been moved back about 600 meters during this period and there was an abrupt change in the glacier terminus during 1990-2002. We propose that debris thickness is not the only factor that influences the glacier ablation but the altitude of the debris-covered glacier as well. Many glaciers in the Karakoram region reported to be expanding were having higher altitudes compared to the study area.     

基于“数字城市”地理空间框架的国土资源档案管理系统的设计与实现

"数字城市"地理空间框架建设中发布的地理信息数据具有丰富性、多样性及准确性等诸多明显优势,基于该框架开发的国土资源档案管理系统,不仅可以使各类档案实现在线信息化管理,并且对地籍档案、建设用地档案及利用规划类档案实现在线位置查询及浏览具有很大作用,可以极大地提高档案信息化管理和应用水平。     

浙江省第一测绘院

<正>浙江省第一测绘院是国家测绘局首批颁布的甲级测绘资格单位,也是浙江省内规模最大的专业测绘单位之一.属公益一类事业单位,主管部门为浙江省测绘与地理信息局。该院成立于1975年,主要业务职责包括:为浙江省重点工程建设提供测绘保障服务,开展数字城市、地理国情普查、天地图等国家重大项目的建设和服务:为政府及有关部门开发建设专题地理信息系统并提供相应公共服务;开展全省导航电子地图数据的采集、处理,提供导航和定位服务:承担国家大地测量任务;建设、维护和更新省级大地基准框架:承担国家基本比例尺地形图测制、更新等基础测绘     

基于SDCORS的车载RTK高程注记点连续采集精度分析

为提高航测法数字线划图(DLG)的生产效率,尽可能减少外业作业时间,基于山东省卫星定位连续运行综合服务系统(SDCORS)的车载RTK技术进行高程注记点采集。采用不同时间(白天、晚上)、不同车速条件进行高程注记点连续采集,并与常规方法(全站仪、单基站RTK)采集高程点进行比较,求取高程中误差,认为在夜间以不大于20 km/h的车速进行采集精度较高。在数字海阳基础地理信息数据采集项目中,利用车载RTK采集346 km2范围内的沿路高程注记点,结果表明能够满足1∶500航测法成图精度要求。     

介休市国土资源局举行“数字介休”地理空间框架建设项目验收会暨推广发布会

正介休市国土资源局早在2011年就确定了启动"数字介休"地理空间框架建设。2013年10月16日,"数字介休"地理空间框架建设项目举行成果验收会暨推广发布会。介休市市委副书记、市长王怀民,副市长许利伟,国土资源局局长侯建平出席会议。该项目新建了"数字介休"地理信息公共平台,开发了政府决策应急指挥地理信息系统、交通指挥地理信     

简述摄影测量与遥感中的4D产品制作

简介摄影测量与遥感中的4D产品的制作方法,以及4D包括的内容。     

黑河流域中游无人机遥感影像数据处理

无人机低空遥感技术是航空遥感领域一个新的发展方向,具有低成本、快捷、灵活机动,以及数据高时效、高分辨率等特点。本文以无人机低空遥感在黑河流域中游张掖的应用为例,介绍了无人机低空遥感系统的基本构成,论述了影像数据的获取、影像的匀色、特征点的提取与匹配、几何纠正与镶嵌、DTM和DOM的生成等处理流程与分析方法。实验结果表明,无人机低空遥感系统能够满足局部区域内的高分辨率、大比例尺基础数据采集的实际需求,在三维重建、土地调查、环境监测等领域具有良好的应用前景。