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网络地图服务开发方法研究 总被引:1,自引:0,他引:1
网络地图服务是随着Internet的广泛应用而产生的一种数字地图新的应用方法,它不仅可以为用户提供现势性很强的地图空间数据资源,也可以使用户将自己的研究成果以网络数字地图形式在互联网上发布。本文在讨论了网络地理信息系统技术的基础上,对于网络地图服务的概念和开发方法进行了研究,分析比较了目前国际上流行的网络地图服务开发方法的优点和缺陷,探讨了利用MapObjects地理信息系统组件开发网络地图服务的方法。 相似文献
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网络地图服务,SOA(ServiceOrientedArchitecture面向服务的架构)是当前研究热点问题之一。结合Flex和JavaScript技术等技术,采用SOA来构建地图服务。这种服务具有受众面广、开发简单、用户体验丰富的特点。 相似文献
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基于网络发布地理信息数据主要是以网络地图服务的形式被广泛应用。开源WebGIS软件应用架构包括数据存储、分析处理应用和发布,对应的应用架构分为数据库技术、客户端软件和服务器端软件。本文通过建立开放式框架结构,结合客户端浏览器、Ajax技术、PostgreSQL数据库以及PostGIS空间插件,尝试将客户端技术运用到GIS空间数据服务中,实现了基于Ajax技术的地图服务的应用。 相似文献
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地图网站是地理空间信息面向公众发布的最好形式。以湖南地图网(www.dzmap.cn)为例,介绍了基于SuperMap IS.NET的地图网站的服务定位、地图数据分析与处理,并讨论了网络地图发布平台架构、网络地图功能与属性数据库设计、数据更新等方面的设计与实现。 相似文献
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本文分析了Adobe Flash技术在网络地图发布前端技术上的优势和应用现状,选择开源Flash地图组件Modest Maps作为开发工具,在其上添加了一些组件模块,以"5.12地震信息显示"为示例,实现了基于Modest Maps的Falsh网络地图发布和简单的空间分析. 相似文献
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版面编排是地图快速复制预处理过程中的一个重要问题.本文提出了一种基于组件技术的通用架构,实现了地图复制原图直观、灵活的版面编排,文中简要介绍了实现地图复制原图版面编排软件的技术途径。 相似文献
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介绍了一种基于全开源架构的互联网地图解决方案;详细阐述了该架构所使用的技术栈,包括非关系型数据库、Web服务器、服务接口、前端架构及地图引擎等;并展示了全开源架构在互联网地图中的实际应用,总结了其优势和不足。 相似文献
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随着地理信息技术和计算机及通讯技术的发展,人们对网络地图服务不断提出新的更高的要求,新的网络地图服务由此出现。通过介绍Google、微软以及Yahoo等公司推出的新型网络地图服务,简单分析了未来网络地图服务的盈利模式。 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