三维全景导游系统的设计与实现

从我国虚拟旅游的发展现状出发,分析了旅游景区网站建立三维全景虚拟展示的可行性和有效性,并在此基础上详细地阐述了旅游三维全景导游系统所涉及的GIS技术、多媒体技术、虚拟现实技术和三维全景技术,介绍了旅游三维全景导游系统设计的相关技术问题,并最终设计和实现了基于GIS和多媒体集成的旅游三维全景导游系统。     

三维激光扫描仪及其测量误差影响因素分析

回顾了近年来三维激光扫描技术及其测量误差方面的研究成果,将三维激光扫描技术分为径向三维激光扫描仪、相位干涉法扫描系统和三角法扫描系统三种类型.从仪器误差、与目标物体反射面有关的误差和外界环境条件影响三个方面,分析了三维激光扫描系统误差影响.     

基于实景三维的警务地理信息系统设计与研究

实景三维技术作为一种全新的地理信息应用技术,可用于各类三维空间分析及可视化应用系统中。本文研究了实景三维技术、可视化技术、空间分析技术等关键技术,结合警务地理信息系统构建模式和业务需求,设计了三维警务GIS系统框架,实现了三维地图展示、警情定位查询、警情态势分析、视频接入和应急指挥决策等功能模块,具有一定的可行性和先进性。     

基于OpenGL的城市管线GIS系统三维模块开发

在深入研究城市管线组成及特点的基础上，基于OpenGL技术和COM技术，从管线的三维显示、三维查询、三维飞行、三维分析等方面设计了城市管线GIS系统的三维模块，并实现了部分功能模块。     

三维地理景观多方位一体化表达技术研究

针对三维可视化技术在地理景观表达中的应用现状,设计了一种基于二维、三维及360°全景技术的地理景观多方位可视化方案,探讨了三维地理景观多方位一体化表达系统的构建流程以及关键技术;并结合传统制图、三维建模、360°全景、Html等技术,采用地貌晕渲图、三维场景和360°全景实时联动的方式构建了三维地理景观多方位一体化表达系统,实现了对三维地理景观的多方位可视化与空间分析,在实际应用过程中取得了较好效果。     

基于三维仿真技术的工商经济户口管理系统建设

阐述了基于三维仿真技术的工商经济户口管理系统建设的系统目标、技术路线、三维基础数据、系统功能等,并介绍了系统开发的关键技术。     

基于三维激光扫描技术的古陵墓可视化

以徐州市狮子山楚王陵为例,基于LeicaHDS公司的ScanStationCIO三维扫捕系统,提出了基于三维激光扫描仪的古陵墓可视化技术流程,并提出了古陵墓点云数据获取与处理、三维景观建模与可视化实现的方法。结果表明：三维激光扫描技术作为一种新的测量手段和技术,能快速、有效地获取古陵墓的高分辨率三维点云数据,在此基础上,可构建精准伟的古陵墓三维景观模型,并进一步开发出古陵墓的三维可视化系统。     

三维激光扫描系统的工程规划

三维激光技术目前在国内外的研究正逐步展开,其应用领域正不断深入。三维激光扫描系统的应用多以工程的形式出现,涉及到数据采集和处理等多个流程,是一个系统工程。作好工程规划工作对于整个系统的应用至关重要。本文通过三维激光扫描系统的工程规划中的外业规划和时间规划,探讨了进行工程规划的意义、内容和方法。有助于三维激光扫描技术的应用与研究。     

河道堤防工程管理三维仿真系统的设计与开发

以湖北省长江河道堤防工程管理三维仿真系统开发为背景,介绍基于ArcEngine的大数据量河道三维仿真系统的设计与实现。采用地理信息系统技术、遥感技术、虚拟现实技术、数据库技术、多媒体技术、互联网技术、面向对象系统设计与分析技术,使系统具有体系结构清晰合理、技术先进、扩展性好、查询方便、三维场景数据量大、功能强大等特点,能有效地为长江堤防管理单位的高效管理、研究和规划服务,提升湖北省河道堤防管理的现代化管理水平,加快以"数字长江"为目标的信息化建设步伐,对其他大数据量三维地理信息系统的实现具有较高的参考价值。     

激光扫描技术在重庆罗汉寺文物保护工程中的应用

介绍了三维激光扫描技术和相关点云处理软件,应用三维激光扫描技术对重庆罗汉寺文物保护工程进行了数据采集、数据预处理、建筑特征提取、点云建模和三维仿真系统建立,该项目的实施对三维激光扫描技术在文物保护方面的应用具有典型的代表意义和社会经济价值。     

阿克苏河-塔里木河水系水质污染遥感监测与评价

 采用Landsat TM数据分析了阿克苏河—塔里木河断面水质污染状况,通过波段的DN值和常规监测数据建立能反映水质状况的 污染物监测模型。结果发现,将2000年常规监测数据代入模型后,与遥感数据的结果基本吻合| 重建阿克苏河—塔里木河的连续水体 污染变化曲线,得出污染物浓度随着远离上游而增加。     

Monitoring drought dynamics in the Aravalli region (India) using different indices based on ground and remote sensing data

The hard-rock hilly Aravalli terrain of Rajasthan province of India suffers with frequent drought due to poor and delayed monsoon, abnormally high summer-temperature and insufficient water resources. In the present study, detailed analysis of meteorological and hydrological data of the Aravalli region has been carried out for the years 1984–2003. Standardised Precipitation Index (SPI) has been used to quantify the precipitation deficit. Standardised Water-Level Index (SWI) has been developed to assess ground-water recharge-deficit. Vegetative drought indices like Vegetation Condition Index (VCI) and Temperature Condition Index (TCI) and Vegetation Health Index (VHI) have been computed using NDVI values obtained from Global Vegetation Index (GVI) and thermal channel data of NOAA AVHRR satellite. Detailed analyses of spatial and temporal drought dynamics during monsoon and non-monsoon seasons have been carried out through drought index maps generated in Geographic Information Systems (GIS) environment. Analysis and interpretation of these maps reveal that negative SPI anomalies not always correspond to drought. In the Aravalli region, aquifer-stress shifts its position time to time, and in certain pockets it is more frequent. In comparison to hydrological stress, vegetative stress in the Aravalli region is found to be slower to begin but quicker to withdraw.     

使用FME与VBA提取机场方格网高程数据

因受机场工程设计软件的测量数据容量限制,基于LiDAR采集、点云分类后得到的地面点云数据LAS不能完整应用于目前设计软件进行设计计算。本文通过对拟选技术方案的筛选,提出了利用FME Workbench数据处理功能,结合VBA编程获取外部方格网平面数据的方法。该方法在FME Workbench中实现了地面点云数据构建TIN、采用逐点内插方法从TIN中提取方格网高程数据、等高线生成及相应图形处理与成果输出。最终通过实际算例证明了该方法的有效性。     

Landslide risk analysis between Giri and Tons Rivers in Himachal Himalaya (India)

The area around Sataun in the Sirmur district of Himachal Pradesh, India (falling between the rivers Giri and Tons; both tributaries of the Yamuna River) was studied for landslide vulnerability on behalf of the inhabitants. The study was made using extensive remote sensing data (satellite and airborne). It is well supported by field evidence, demographic and infrastructural details and aided by Geographic Information System (GIS) based techniques. Field observations testify that slope, aspect, geology, tectonic planes, drainage, and land use all influence landslides in the region. These parameters were taken into consideration using the statistical approach of landslide hazard zonation. Using the census data of 1991, vulnerability of the populace to the landslide hazard was accessed. As most of the infrastructure in the region is concentrated around population centres, population data alone was used for vulnerability studies.     

Gravity Changes Before Large Earthquakes in China: 1998-2005

Although it is well known that coseismic gravity changes take place during an earthquake, previous research has not yielded convincing evidence demonstrating that significant gravity changes occur before large earthquakes. Furthermore, even if we suspect that gravity changes occur before large earthquakes, we have yet to demonstrate how to consistently observe these changes for useful earthquake forecast that would bring benefits to society. We analyzed ground gravity survey data obtained in 1998, 2000, 200...     

GNSS系统及其技术的发展研究

阐述了国际上卫星导航系统的总体发展,对美、俄、欧、中的四大全球系统,以及相关的区域系统和增强系统进行了简单的介绍,研究分析了GNSS系统及其技术的发展趋势,同时分析了我国Compass全球系统面临的机遇和挑战,并提出了我国未来工作的建议.     

“4D”技术及其应用

介绍“４Ｄ”（即数字地面模型、数字正射影像、数字栅格地图和数字线划地图）系列产品的生产流程、关键技术、及其在耕地保护、防灾减灾救灾和城市规划等方面的应用方法。     

Virtual Australia: its key elements – know,think, communicate

Abstract

Virtual Australia is not a well-defined or agreed concept. This discussion paper conceptualises Virtual Australia as a ‘virtual [digital] model containing and representing all non-trivial objects and their contextual environment – from blue sky to bedrock – in real world Australia’. It describes a scenario for Virtual Australia, one or two decades from now, in which the locations and conditions of non-trivial objects and their environment are updated automatically through a combination of remote sensing and wireless communication technologies in support of a ‘Supranet’. It then examines the concept of the ‘Supranet’ – a pervasive information network based largely on wireless technology linking the physical world to a virtual model in real time – and develops and discusses three principal characteristics of the Supranet: the ability to have or collect specific information (know); the ability to process information (think); and the ability to communicate that information. If, in the near future, any or all non-trivial devices are to some extent able to know, think and communicate, the potential for object autonomy will be realised.     

自动车辆定位导航系统中传感器的误差分析

对国界定位导航系统中几种常见的辅助传感器所产生的误差进行了分析，导出了不同传感器的误差模型。这些误差模型是估计车辆位置的扩展卡尔曼滤波器的基础，同时也为选择适当的传感器提供了理论根据。