全部文献期刊会议图书|学者科研项目
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作者:Longgang Xiang , Juntao Huang ...
来源:[J].ISPRS International Journal of Geo-Information, 2016, Vol.5 (7)
摘要:This paper addresses how to manage planar spatial data using MongoDB, a popular NoSQL database characterized as a document-oriented, rich query language and high availability. The core idea is to flatten a hierarchical R-tree structure into a tabular MongoDB collection, during wh...
作者:Tao Wu , Longgang Xiang , Jianya Gong
来源:[J].ISPRS International Journal of Geo-Information, 2016, Vol.5 (9)
摘要:The long production cycle and huge cost of collecting road network data often leave the data lagging behind the latest real conditions. However, this situation is rapidly changing as the positioning techniques ubiquitously used in mobile devices are gradually being implemented in...
作者:... JianYa Gong , LongGang Xiang , Jing Chen
来源:[J].Science China Technological Sciences(IF 1.187), 2010, Vol.53 (1), pp.61-67
摘要:Abstract(#br)Virtual globe has been recognized as an appealing technology to support the digital earth. It provides an intuitive and appealing way to visualize geospatial information, and is being used frequently to bring the globe-scale geospatial information to our fingertips. ...
作者:LongGang Xiang , Jing Chen
来源:[J].Science China Technological Sciences(IF 1.187), 2010, Vol.53 (1), pp.1-6
摘要:Abstract(#br)Massive volumes of global geospatial information are being collected by newly designed acquisition devices and generated by various geospatial applications. This poses a critical challenge to efficiently organize and effectively integrate global multi-source geospati...
作者:Jing Chen , LongGang Xiang , JianYa Gong
来源:[J].Science China Earth Sciences(IF 1.255), 2013, Vol.56 (10), pp.1780-1790
摘要:Abstract(#br)How to integrate and disseminate globally distributed multi-source and heterogeneous spatial information is an open problem in integration and sharing service of geographic information. Here we propose a new service architecture suitable for integration and shar...
作者:Shangyu Sun , Huayi Wu , Longgang Xiang
来源:[J].Sensors(IF 1.953), 2020, Vol.20 (2)
摘要:City-wide traffic flow forecasting is a significant function of the Intelligent Transport System (ITS), which plays an important role in city traffic management and public travel safety. However, this remains a very challenging task that is affected by many complex factors, such ...
作者:Longgang Xiang , Siyu Li
来源:[J].ISPRS International Journal of Geo-Information, 2019, Vol.8 (11)
摘要:Extracting highly detailed and accurate road network information from crowd-sourced vehicle trajectory data, which has the advantages of being low cost and able to update fast, is a hot topic. With the rapid development of wireless transmission technology, spatial positioning tec...
作者:Longgang Xiang , Juntao Huang ...
来源:[J].ISPRS International Journal of Geo-Information, 2016, Vol.5 (7)
摘要:This paper addresses how to manage planar spatial data using MongoDB, a popular NoSQL database characterized as a document-oriented, rich query language and high availability. The core idea is to flatten a hierarchical R-tree structure into a tabular MongoDB collection, during wh...
作者:Longgang Xiang , Meng Gao ...
来源:[J].ISPRS International Journal of Geo-Information, 2016, Vol.5 (3)
摘要:Trajectories, representing the movements of objects in the real world, carry significant stop/move semantics. The detection of trajectory stops poses a critical problem in the study of moving objects and becomes even more challenging due to the inevitable noise recorded along wit...
作者:Tao Wu , Longgang Xiang , Jianya Gong
来源:[J].IJGI, 2016, Vol.5 (9)
摘要:The long production cycle and huge cost of collecting road network data often leave the data lagging behind the latest real conditions. However, this situation is rapidly changing as the positioning techniques ubiquitously used in mobile devices are gradually being implemented in...

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