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随着观测技术的进步及计算机信息技术的发展,地理信息应用不断向各行业扩展.地理空间信息服务方面出现了信息资源供需矛盾,一方面,测绘专业部门拥有丰富的空间信息数据;另一方面,各行业的特定需求难以满足.如何提高地球空间信息服务的质量和效率,使已有的测绘成果在各行业应用中得到更好的应用,借助飞速发展的计算机技术已成为一种趋势.本文研究并分析了地球空间信息服务的特征和分类,对目前在各行业广泛应用的规则引擎技术进行了研究,提出了将规则引擎技术应用到空间信息服务的方式和关键技术,并设计了基于分布式计算的空间规则引擎,将其应用到地理空间信息向特定行业应用提供空间数据分发服务的应用系统中.以空间规则引擎为核心,构建了面向行业应用的空间数据服务模型,并进行了原型系统设计,通过空间规则引擎,提高了测绘专业部门向其他特定行业提供空间数据分发服务的时效性,满足了特定行业对空间信息特殊、多变的需求. 相似文献
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智慧地球时代测绘地理信息学的新使命是什么?什么叫智慧地球,智慧地球靠哪些技术来支撑,智慧地球的主要特性,智慧地球时代测绘地理学面临着哪些使命.
智慧地球是我们在数字地球已经建立起来的数字框架上,通过互联网将现实世界与数字世界进行有效融合,感知现实世界中人和物的各种状态和变化,由云计算中心处理其中海量和复杂的计算与控制,为社会发展和大众生活提供各种智能化的服务.智慧城市是智慧地球的重要组成部分.所以简单的说,就是智慧地球=数字地球+物联网+云计算.数字地球相关技术:1、天空地一体化的空间信息快速获取技术;2、海量空间数据调度与管理技术;3、空间信息可视化技术;4、空间信息分析与挖掘技术;5、网络服务技术. 相似文献
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我国以物联网、云计算和地理信息产业为代表的产业战略对高等院校的专业人才培养提出了新的要求。在新地理信息时代多学科交叉中的大测绘科学快速发展的趋势下,空间数据基础设施需要利用实时空间信息供给和传感器网络改进监测、控制、态势感知和决策制定。武汉大学在此背景下已经面向空间信息与数字技术专业开设了空间信息与传感器网络课程。本文介绍课程建设意义与目标的基础上,详细阐述了课程内容、教学要求、参考资料和考核方法,最后总结了教学效果及存在的问题与建议。 相似文献
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《武汉大学学报(信息科学版)》2006,31(3):277
从全国科技大会上获悉，武汉大学两项测绘成果奖获2005度国家年科技进步二等奖，项目名称分别是“空间数据自动综合技术应用工程”和“空间信息网络服务技术及产业化”。 相似文献
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信息化测绘是经过数字化改造以提供地理空间信息服务为主要目标的现代测绘体系。众多技术的进步在影响着我国信息化测绘的建设，这些技术的突破也影响着我国地理信息产业的发展。测量仪器的数字化、遥感技术的高精度、数据管理的综合化、地理空间信息的三维可视化、地理空间信息的移动化、地理空间信息的标准化等都在飞速发展，本文对这种变化作了概括，对地理信息产业的发展也作了预测。 相似文献
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针对海量动态目标渲染效率较慢的问题,本文研究并设计了基于混合加速的高性能GIS动态目标渲染引擎,并利用SuperMap的组件GIS研发了动态目标渲染引擎原型系统.通过比较不同类型海量空间数据的可视化实验结果表明,本文研究成果在渲染二维和三维空间海量动态目标时,满足GIS高性能可视化需求,可视化效果流畅. 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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Monitoring drought dynamics in the Aravalli region (India) using different indices based on ground and remote sensing data 总被引：5，自引：0，他引：5
C. Bhuiyan R.P. Singh F.N. Kogan 《International Journal of Applied Earth Observation and Geoinformation》2006,8(4):289-302
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. 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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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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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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自动车辆定位导航系统中传感器的误差分析 总被引：1，自引：0，他引：1
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。 相似文献