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基于WebGIS的数字校园信息管理系统的建立 总被引:1,自引:0,他引:1
阐述了数字校园的概念,在对webGIS的概念、特点及基本原理分析的基础上,提出了利用WebGIS技术开发数字校园的思路,建立了基于WebGIS的数字校园信息管理系统,对校园进行科学、有效地管理,充分利用了学校的资源配置,提高了工作效率. 相似文献
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面向应用的模型库系统的设计与实现 总被引:1,自引:0,他引:1
应用面向对象的方法,设计开发了面向应用的模型库系统.在分析描述模型和操作模型关系的基础上,探讨了模型类和模型实例的概念及模型应用、组合和维护机制,进而实现了模型类的抽象、封装与继承机制.集成了一些常用的统计分析模型,建立了统计模型库原型系统. 相似文献
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论述了电子海图加密的目的及强度控制;介绍了常用加密系统的运行机理及适用场合;阐述了实现安全系统目标在管理和技术上存在的障碍;提出了可供选择的各种加密方案并分析了各方案的优缺点. 相似文献
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介绍了WebGIS的概念和特点,详细论述了实现WebGIS的一些关键技术;提出了解决基于网络的海量数据的数据结构组织和传输方案,以及如何在WebGIS的开发中引入ODBC技术、ASP技术来实现数据的管理;另外,提出了几点建立WebGIS应考虑的问题. 相似文献
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论述了《地图学》对培养、提高GIS专业学生素质和创新能力的重要作用;讨论了《地图学》与GIS的关系;结合GIS专业的特点对《地图学》的授课内容和实习内容的安排进行了研究;对《地图学》的教学方法进行了探讨。 相似文献
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通过对网络GIS的发展现状及其各结构模式优缺点的介绍,探讨了RIA概念模型;应用RIA技术,设计了基于RIA的网络GIS的体系结构架构,并实现了相应系统功能。该结构模式增强了客户端的用户体验感,减轻了服务器的压力。 相似文献
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随着移动通信网络从2.5G向3G的演进,我国移动位置服务业务和产业都有了长足的发展,基于位置服务(LBS)将成为地理信息产业和移动通信市场增值服务的一个亮点。介绍了目前主要的LBS定位服务的技术实现,总体设计了基于位置服务的地理信息系统,描述了系统的构架和功能模块,探讨了相关技术难点,为地理信息技术与服务在移动LBS业务中的应用提供借鉴。 相似文献
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在分析了国土资源信息化建设现状及其存在的问题的基础上,本文提出了莱州市国土资源电子政务系统的设计思想和网络结构方案,对面向业务流程的多层电子政务设计模式和系统功能模块设计进行了详细的描述,最后阐述了所涉及的关键技术和国土资源数据中心的内容。 相似文献
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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。 相似文献
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ZHAN F. Benjamin 《地球空间信息科学学报》2011,(1)
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... 相似文献
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Piyoosh Rautela Ramesh Chandra Lakhera 《International Journal of Applied Earth Observation and Geoinformation》2000,2(3-4)
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. 相似文献
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GNSS系统及其技术的发展研究 总被引:3,自引:1,他引:2
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. 相似文献
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“4D”技术及其应用 总被引:13,自引:0,他引:13
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。 相似文献
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《International Journal of Digital Earth》2013,6(1):66-87
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. 相似文献
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Toward seamless indoor-outdoor applications: Developing stakeholder-oriented location-based services
Kohei OGAWA Edward VERBREE Sisi ZLATANOVA Naohiko KOHTAKE Yoshiaki OHKAMI 《地球空间信息科学学报》2011,14(2):109-118
Location-Based Services (LBS),an emerging new business based on smartphone and mobile networks,are becoming more and more popular.Most of these LBSs,however,only offer non-seamless indoor/outdoor applications and simple applications without giving stakeholders the chance to play an active role.Our specific aim is to solve these issues.This paper presents concepts to solve these issues by expanding the Open Location Services Interface Standard (OpenLS) to allow seamless indoor/outdoor positioning and to extend the content of the services to include information recommended by stakeholders. 相似文献