共查询到20条相似文献，搜索用时 406 毫秒
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基于PDA的GIS实时测图系统开发 总被引：8，自引：0，他引：8
讨论了Windows CE环境下基于PDA的GIS实时测图系统开发原理和方法。简述了其开发基本理论，探讨了eMbedded VC 开发环境下基于PDA的GIS实时测图系统开发具体技术。介绍了POCKETPC中实现的一个GIS实时测图系统及其进行的初步应用，这为基于PDA等移动设备进行移动制图或移动GIS研究和开发提供了有益的参考模式。 相似文献
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随着人们生活水平的不断提高,PDA以其体积小、能耗低、功能强、易开发等优势已经进入平民化阶段.目前,基于PDA的移动GIS开发和应用已成为越来越多GIS二次开发商和用户关注的焦点.本文首先介绍了PDA的定义、分类和主流操作系统,然后分析了移动GIS的特点,并对比了几种可视化开发语言,最后以一个实例来阐述基于PDA的移动GIS开发. 相似文献
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基于PDA的森林防火GIS的研究与实现 总被引：2，自引：0，他引：2
目前,基于PDA的森林防火地理信息系统,以其自身独特的优势引起林业领域的广泛关注.本文从森林防hA-面,对基于PDA的嵌入式GIS系统进行探讨.首先介绍系统的开发环境和软件功能设计,然后分析系统实现的关键技术和方法,最后对基于PDA的森林防火GIS的应用前景进行了展望. 相似文献
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面向服务的移动GIS开发与应用逐渐成为移动GIS领域研究热点和发展趋势。本文首先介绍了Android终端和UCMap开发平台等相关知识;其次详细研究了基于移动GIS应用的Android平台开发环境搭建和基于UCMap平台的Android终端应用二次开发模块;最后提出了一种基于移动GIS应用的UCMap平台开发与应用模式,并在Android平台上进行了相关技术验证,对移动GIS应用研究具有较高的技术参考价值。 相似文献
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基于GIS技术的国土资源政务信息系统是当前国土资源信息化建设的重要技术手段之一。详细阐述了基于GIS的国土资源电子政务平台的关键技术和建设思路,给出了国土资源电子政务GIS平台的架构。 相似文献
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面向服务的移动GIS开发与应用逐渐成为移动GIS领域研究的热点和发展趋势。本文首先介绍了An-droid终端和UCMap开发平台等相关知识;其次,详细地研究了基于移动GIS应用的Android平台开发环境搭建和基于UCMap平台的Android终端应用二次开发模块;最后,提出了一种基于移动GIS应用的UCMap平台开发与应用模式,并在Android平台上进行了相关技术验证,对移动GIS应用研究具有较高的技术参考价值。 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