From Rubble to Virtual Reality: Photogrammetry and the Virtual World of Ancient Ayutthaya, Thailand

For in excess of 100 years, photogrammetry has played a significant role in documenting the cultural heritage of nations and peoples. Many recent advances in the technique have enhanced the use of photogrammetry as a recording tool, enabling more complex representations of objects and moving access to the procedure from the expert to the interested user. Some of these recent developments include low cost digital photogrammetric systems, image sequence analysis, bundle adjustment and camera calibration procedures, and three dimensional laser scanning. An overview of some of these developments is given in this paper. The University of Melbourne, in conjunction with Chulalongkorn University in Bangkok, has been working on a project to create a computer visualization of the ancient Thai city of Ayutthaya. This project has blended three dimensional CAD models of the architectural features of Ayutthaya with historical research and artistic rendering to build a realistic representation of this city as it may have existed in the past. The model of the city has been built up from historical “maps”, aerial photographs, field survey and the use of photogrammetry to derive models of individual wat, chedi, prang (see GLOSSARY) and statuary. The historical research conducted in Thailand has provided the basis for the determination of the most likely location and appearance of the missing structures. The CAD models created from the photogrammetry have been visualized by the addition of surface textures and materials and rendered in as realistic a manner as possible. The virtual city has also been augmented by the incorporation of live actors in the computer reconstruction. When completed, the end product will be capable of producing an experience of daily life in Ayutthaya, with the potential for giving the user a level of interaction. The reconstruction will also be used as the basis of a variety of educational products to be produced in Thailand on a number of different media, including a bilingual CD-ROM already developed to “proof-of-concept” stage.     

中国冰川学和冻土学研究40年的回顾与展望

During the past four decades, breathtaking progress has been achieved in China from almost zero to increasingly advanced stages in glaciology and geocryology. The interactions between the cryosphere and climate are of great concern at present. Studies on the water resources in arid and cold regions, hazards control and cold regions engineering under a warming climate are critically important to the sustainable and concordant development of the regional economies and ecosystems. As a mechanism for the above topics, geographic information sciences have significantly facilitated the data processing and insights into the fledgling cryosphere sciences and therefore, should be expedited.     

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根据华东地质学院校园网二期建设项目,简要介绍了本院校园网的拓扑结构图、校园网采用的VLAN技术及其第三层交换（路由）技术,阐述了校园网建设中子网划分与IP地址分配方法。     

基于ArcGIS Engine的自主旅游信息系统的设计和实现

传统旅游信息系统注重旅游信息的查询以及决策和管理,很少有自主发布信息的、个性化的、注重自主享受旅游和回顾评价旅游过程的信息系统出现。为此,本文以C#语言为基础用Arc GIS Engine二次开发的方法,设计和实现了一个自主旅游信息系统原型,详细剖析了该系统的设计和实现流程,测试表明该系统能初步满足游客个性化旅游的要求,为宣传"智慧旅游"提供了新的方法和手段。     

On the feedback between water turbidity and microphytobenthos growth in shallow tidal environments

Shallow tidal environments (e.g. bays, estuaries, lagoons) represent one of the most productive ecosystems in the world, and they are threatened by current climate change and increasing human pressure. Monitoring the bio-morphodynamic evolution of these environments is therefore a crucial task that requires a detailed and holistic scrutiny. The present study aims to investigate the temperature of the water–sediment continuum, its effect on the related microphytobenthos (MPB) growth and the related bio-stabilization of the bed sediment surface under different water depth and water turbidity conditions. We investigated the vertical energy transfer and the temperature dynamics by applying a 1-D model to a shallow coastal lagoon. Our results show that the water temperature does not substantially change under different turbidity conditions, whereas the sediment temperature exhibits important changes. Two major factors driving the MPB photosynthetic growth are the sediment surface temperature and the light availability at the sediment bed, which can both be computed using the vertical energy transfer model. We observed that, in general, clear water conditions better promote MPB growth over the entire year. The limiting factor for the photosynthetic process is usually the light availability at the bottom, which increases under clear water conditions. As MPB provides a bio-stabilizing effect on the bed sediments by producing a biofilm on the sediment surface that reduces sediment resuspension, our results suggest a positive feedback between MPB growth and water column turbidity. Furthermore, MPB growth and the related sediment bio-stabilization are clearly affected by the seasonal variation of surface sediment temperature and light availability. This seasonal variation of MPB growth rate and surface sediment bio-stabilization must be considered when studying the long-term morphodynamic evolution of tidal environments. © 2018 John Wiley & Sons Ltd.     

柴达木盆地北缘侏罗纪古生态特征及其古地理意义

根据多门类化石古生态和岩相、沉积构造等资料,分析了柴达木盆地北缘侏罗纪的古气候和沉积环境。介形类、轮藻、叶肢介、双壳类和植物等化石在地层中的产出特征反映了当时以湖沼及滨浅湖为主的沉积环境,广泛分布的植物及孢粉化石组合面貌的变化揭示出盆地北缘早、中侏罗世为热带－亚热带温湿气候,早侏罗世晚期和中侏罗世晚期古气候两度明显干热化。陆生植物与湖沼相动物化石的交替出现,反映了盆地北缘侏罗纪湖泊、沼泽与低山相间分布的古地理面貌。早侏罗世湖泊多期发育但规模较小,中侏罗世中晚期湖泊规模最大。     

基于MapGIS的湖北省建工检测实验室资源管理地理信息系统的建立

介绍了基于MapGIS的湖北省建工检测实验室资源管理地理信息系统的设计目标、系统构成、系统实现、系统功能、系统成果等内容,明确了今后的努力方向.该系统为充分利用现有检测资源和合理投资开发检测资源提供了科学、高效和可视的信息化手段,为国家"十一五"规划中检测资源共享平台的建设提供了理论和技术准备.     

安徽省防震减灾基础地理数据库设计与实现

阐述了建立统一的防震减灾空间数据库的重要性、目前空间数据的主要存储方式及各自优缺点。详细介绍了安徽省防震减灾基础地理数据库的建库思路及数据库管理系统的技术实现。     

智慧嘉兴时空大数据与云平台设计与实现

在数字嘉兴建设成果的基础上,本文结合"智慧嘉兴"时空大数据与云平台试点项目建设,探讨构建全市统一的智慧城市时空大数据与云平台,介绍了平台总体架构、技术路线设计、系统实现、示范应用及关键技术分析,根据运行实践证明,该平台能够为全市政府部门、企事业单位及社会公众提供权威、统一、可靠的智慧时空信息服务.     

水足迹与主成分分析法耦合的新疆水资源承载能力评价

通过耦合水足迹理论与主成分分析方法,构建基于水足迹的新疆地区水资源承载力评价指标体系,分析研究区2010～2015年间水资源承载能力变化情况.结果表明:2010～2015年间新疆地区的水资源承载力呈先增大后减小的现象,2014年水资源承载力最差,供水压力最大.其中,研究区的承载力主要受水资源和社会因素以及进出口贸易中虚...