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Full-Text Articles in Computer Engineering
The Analysis And Deployment Of A Fully Open Monitoring System In The Sri Lankan Deduroya Basin: The 4onse Project, Massimiliano Cannata, Daniele Strigaro, Imran Shahid, Rangajeewa Ratnayake, B.H. Sudantha
The Analysis And Deployment Of A Fully Open Monitoring System In The Sri Lankan Deduroya Basin: The 4onse Project, Massimiliano Cannata, Daniele Strigaro, Imran Shahid, Rangajeewa Ratnayake, B.H. Sudantha
Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings
The 4onse project studies non-conventional monitoring systems fully based on open technologies (hardware, standard protocols, software and data) for the management of resources and natural hazards in developing countries. After the design of hydro-meteorological stations and software for the collection, management and distribution of data, the study involves the installation of 30 stations in the Deduroya Oya river basin in Sri Lanka. The system will be analysed to fully understand the real cost of ownership, data quality and applicability in real situations. If properly validated, these systems can provide an alternative solution, effective and sustainable for the protection of property …
Istsos Version 3, Cannata Massimiliano, Milan Antonovic, Daniele Strigaro, Mirko Cardoso
Istsos Version 3, Cannata Massimiliano, Milan Antonovic, Daniele Strigaro, Mirko Cardoso
Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings
istSOS version 3 is a new full stack open source application framework that, implementing the Sensor Observation Service standard from the OGC and including some special features, offers the capability to manage and disseminate observation from sensors networks. istSOS3 has been redesigned with the mission to solve the problems of high loads environments and quality of service. After some recent researches that have shown that istSOS version 2 is not adequate to meet high demanding environment in terms of high concurrency, big data and performance, istSOS version 3 has been rewritten from ground up taking advantages from the latest technologies …
The Construction Of Open Data Portal Using Dkan For Integrate To Multiple Japanese Local Government Open Data, Toshikazu Seto, Yoshihide Sekimoto
The Construction Of Open Data Portal Using Dkan For Integrate To Multiple Japanese Local Government Open Data, Toshikazu Seto, Yoshihide Sekimoto
Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings
In recent years, the Code for Japan, a civic tech community in Japan, has focused on the context of the FOSS4G. Consequently, the Japanese have published open data in more than 150 local governments, but these data are almost simply provided as a file on their website. And also CKAN portal are used less than 20 cities. In this study, we built open data platform that uses DKAN for integrated open data distribution of Japanese local governments.
Supporting Trajectory Udf Queries And Indexes On Postgis, Pyoung Woo Yang, Kwang Woo Nam
Supporting Trajectory Udf Queries And Indexes On Postgis, Pyoung Woo Yang, Kwang Woo Nam
Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings
In this paper, we propose a system model for querying and indexing the GPS trajectory of moving objects on PostGIS/PostgreSQL. We developed moving object data types including MPoint(moving point), MDouble(moving double) for GPS trajectories. Also, various moving objects UDFs(user-defined functions) are implemented for moving objects queries. For efficient query processing, r-tree index is extended for trajectory, and pre-materialization techniques are proposed for fast UDF processing. Experimental results show that the pre-materialization techniques are about 1.2 times faster than naïve query processing using r-tree index.
Analyzing The Performance Of Nosql Vs. Sql Databases For Spatial And Aggregate Queries, Sarthak Agarwal, Ks Rajan
Analyzing The Performance Of Nosql Vs. Sql Databases For Spatial And Aggregate Queries, Sarthak Agarwal, Ks Rajan
Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings
Relational databases have been around for a long time and spatial databases have exploited this feature for close to two decades. The recent past has seen the development of NoSQL non-relational databases, which are now being adopted for spatial object storage and handling, too. While SQL databases face scalability and agility challenges and fail to take the advantage of the cheap memory and processing power available these days, NoSQL databases can handle the rise in the data storage and frequency at which it is accessed and processed - which are essential features needed in geospatial scenarios, which do not deal …