三维城市模型(3DCM,3 Dimensional City Model)经过多年的研究和应用,已经在交通、勘察、测绘,特别是城市规划、建设等方面得到广泛应用,并发挥了一定的作用。本文在对三维城市模型研究的同时广泛收集相关资料,对近年来不同学者和机构...三维城市模型(3DCM,3 Dimensional City Model)经过多年的研究和应用,已经在交通、勘察、测绘,特别是城市规划、建设等方面得到广泛应用,并发挥了一定的作用。本文在对三维城市模型研究的同时广泛收集相关资料,对近年来不同学者和机构对三维城市模型的学术和应用研究工作进行了归类和综述,并总结了当前三维城市模型研究的特点和发展思路,以供广大研究者参考、交流。展开更多
There are several issues with Web-based search interfaces on a Sensor Web data infrastructure.It can be difficult to(1)find the proper keywords for the formulation of queries and(2)explore the information if the user ...There are several issues with Web-based search interfaces on a Sensor Web data infrastructure.It can be difficult to(1)find the proper keywords for the formulation of queries and(2)explore the information if the user does not have previous knowledge about the particular sensor systems providing the informa-tion.We investigate how the visualization of sensor resources on a 3D Web-based Digital Earth globe organized by level-of-detail(LOD)can enhance search and exploration of information by easing the formulation of geospatial queries against the metadata of sensor systems.Our case study provides an approach inspired by geographical mashups in which freely available functionality and data are flexibly combined.We use PostgreSQL,PostGIS,PHP,and X3D-Earth technologies to allow the Web3D standard and its geospatial component to be used for visual exploration and LOD control of a dynamic scene.Our goal is to facilitate the dynamic exploration of the Sensor Web and to allow the user to seamlessly focus in on a particular sensor system from a set of registered sensor networks deployed across the globe.We present a prototype metadata exploration system featuring LOD for a multiscaled Sensor Web as a Digital Earth application.展开更多
文摘三维城市模型(3DCM,3 Dimensional City Model)经过多年的研究和应用,已经在交通、勘察、测绘,特别是城市规划、建设等方面得到广泛应用,并发挥了一定的作用。本文在对三维城市模型研究的同时广泛收集相关资料,对近年来不同学者和机构对三维城市模型的学术和应用研究工作进行了归类和综述,并总结了当前三维城市模型研究的特点和发展思路,以供广大研究者参考、交流。
基金This work was supported in part by the Korea Institute of Science and Technology(KIST)Institutional Program(Project No.2E24100).
文摘There are several issues with Web-based search interfaces on a Sensor Web data infrastructure.It can be difficult to(1)find the proper keywords for the formulation of queries and(2)explore the information if the user does not have previous knowledge about the particular sensor systems providing the informa-tion.We investigate how the visualization of sensor resources on a 3D Web-based Digital Earth globe organized by level-of-detail(LOD)can enhance search and exploration of information by easing the formulation of geospatial queries against the metadata of sensor systems.Our case study provides an approach inspired by geographical mashups in which freely available functionality and data are flexibly combined.We use PostgreSQL,PostGIS,PHP,and X3D-Earth technologies to allow the Web3D standard and its geospatial component to be used for visual exploration and LOD control of a dynamic scene.Our goal is to facilitate the dynamic exploration of the Sensor Web and to allow the user to seamlessly focus in on a particular sensor system from a set of registered sensor networks deployed across the globe.We present a prototype metadata exploration system featuring LOD for a multiscaled Sensor Web as a Digital Earth application.
