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针对现有的商业地理信息系统平台难以灵活整合多源影像数据融合使用的问题,深入研究Cesium平台下多种数据源的空间参考差异和瓦片组织规则,针对不同空间参考的瓦片数据源进行混搭设计,提出基于Cesium的多源本地瓦片数据静态和动态加载方案。实验结果表明,单一瓦片数据源加载方案、静态和动态多源瓦片混搭方案的展示效果较好;静态瓦片混搭方案在加载不同空间参考瓦片数据时容易造成变形;动态多源、多空间参考瓦片混搭方案能有效克服变形问题且展示效果佳。本文实现了在开源GIS平台下的多源影像数据的融合使用,为地理信息系统与遥感类项目应用提供了一个低成本、高灵活性的解决方案,具有较为明显的实际应用价值。 相似文献
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Harish Chandra Karnatak Reedhi Shukla Vinod Kumar Sharma Y.V.S. Murthy V. Bhanumurthy 《国际地球制图》2013,28(6):499-514
The Web 2.0 technologies and standards enable web as a platform by allowing the user participation in web application. In the realization of Web 2.0, new knowledge and services are created by combining information and services from different sources which are known as ‘mashups'. The present study focused on spatial mashup solution for disaster management using open source GIS, mobile applications, web services in web 2.0, Geo-RDBMS and XML which are in the central of intelligent geo web services. The geo-web application is developed to generate the actionable GIS products at user end during disaster event by consuming various data and information services from web and central server system and also real time ground observation data collected through a mobile device. The technological solution developed in this study is successfully demonstrated for disaster management in the Assam State of India during the floods in 2010. 相似文献
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针对WebGIS在气象业务应用系统的现状和存在问题,开发了具有自主知识产权的气象GIS网络平台。该文介绍了平台开发的背景、目标、功能结构,结合气象数据特点和业务需求分析,对系统建设中的关键技术进行详细探讨,包括智能缓存技术,基于RIA (Rich Internet Application, 富互联网应用程序) 的渲染绘制技术,气象数据监视机制以及地图服务聚合技术。基于气象GIS网络平台搭建了国家级和省级气象应用业务系统,系统运行稳定,实现了海量气象数据的网络高效发布、快速渲染绘制、数据自动监视更新以及地图服务定制等功能,对气象信息网络服务具有重要意义和应用价值。 相似文献
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本文介绍了地理信息服务平台开放式API技术,构件基于API技术的WebGIS融入式地图应用中多源异构数据资源整合方法、网络通讯协议及数据传输,结合应用开发实例,重点介绍了基于API技术的WebGIS架构。 相似文献
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Geospatial data are now widely available to the general public thanks to geoportals and online mapping platforms. However, creating a map involves more than just combining data layers. Thus we develop cartographic functions for geoportals to support better visual hierarchy in user map mashups. This includes a couple of preparatory steps followed by a smart cartographic background symbolization derived from the original layer style. We evaluate different approaches to background symbolization: greyscale, desaturation, and smart background. The different background symbolization methods are analysed with two concrete map examples and evaluated with a survey. The smart background symbolization developed in this work improves the visual hierarchy of the map mashup by reducing the visual importance of the background layers. 相似文献
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