Nowadays, in the GIS world, same as other IT related disciplines, the Internet and its applicatio... more Nowadays, in the GIS world, same as other IT related disciplines, the Internet and its applications, particularly the World Wide Web (WWW), make exchange of geospatial data and publishing geospatial information much easier than ever before. On account of the nature of the Web as a human-centric media, the existing Web is an efficient platform for publishing geospatial information. But
Recent developments in Web service technologies as collection of XML -based protocols and technol... more Recent developments in Web service technologies as collection of XML -based protocols and technologies have shown promise for automatic discovery, access and use of data and processing resources over internet in an interoperable manner. Like Web services in Information Technology world, in GIS community, Open Geospatial Consortium (OGC) Web service framework as collection of geospatial Web services and encodings have
2013 Fourth International Conference on Computing for Geospatial Research and Application, 2013
ABSTRACT form only given: Today a huge amount of geospatial data is being created, collected and ... more ABSTRACT form only given: Today a huge amount of geospatial data is being created, collected and used more than ever before. The ever increasing observations and measurements of geo-sensor networks, satellite imageries, point clouds from laser scanning, geospatial data of Location Based Services (LBS) and location-based social networks has become a serious challenge for data management and analysis systems. Traditionally, Relational Database Management Systems (RDBMS) were used to manage and to some extent analyze the geospatial data. Nowadays these systems can be used in many scenarios but there are some situations when using these systems may not provide the required efficiency and effectiveness. More specifically when the geospatial data has high volume, high frequency of change (in both data content and data structure) and variety of structures, the conventional data storage systems cannot provide needed efficiency in online systems in terms of performance and scalability. In these situations, NoSQL solutions can provide the efficiency necessary for applications using geospatial data. This paper provides an overview of the characteristics of geospatial big data, possible solutions for managing and processing them. Then the paper provides an overview of the major types of NoSQL solutions, their advantages and disadvantages and the challenges they present in managing geospatial big data. Then the paper elaborates on serving geospatial data using standard geospatial web services with a NoSQL XML database as a backend.
Time is a basic measure used to quantify the motions of objects, to compare the durations of even... more Time is a basic measure used to quantify the motions of objects, to compare the durations of events, and to sequence events. Temporal behaviors of spatial objects have occupied geoinformatic’s minds and this motivation can be seen in temporal GIS (Geospatial Information System) and navigation. This article focuses on a mathematical abstraction for calculating periods of time. Uncertainty in temporal intervals is considered and temporal relationships are defined based on rough set theory as a powerful device to handle the indeterminate time interval.
Proceedings of the Third ACM SIGSPATIAL International Workshop on Querying and Mining Uncertain Spatio-Temporal Data - QUeST '12, 2012
ABSTRACT Navigation services, such as used in cars, are widely used nowadays. Many applications, ... more ABSTRACT Navigation services, such as used in cars, are widely used nowadays. Many applications, positioning technologies and techniques have been developed to make navigation systems easier to use. However current navigation systems suffer from different aspects of uncertainty such as incomplete or inaccurate positional data. This paper reviews aspects of uncertainty which should be considered when developing navigation systems. A proposed approach, based on rough set and fuzzy set theories, is explained and implemented in an application.
Nowadays, in the GIS world, same as other IT related disciplines, the Internet and its applicatio... more Nowadays, in the GIS world, same as other IT related disciplines, the Internet and its applications, particularly the World Wide Web (WWW), make exchange of geospatial data and publishing geospatial information much easier than ever before. On account of the nature of the Web as a human-centric media, the existing Web is an efficient platform for publishing geospatial information. But
Recent developments in Web service technologies as collection of XML -based protocols and technol... more Recent developments in Web service technologies as collection of XML -based protocols and technologies have shown promise for automatic discovery, access and use of data and processing resources over internet in an interoperable manner. Like Web services in Information Technology world, in GIS community, Open Geospatial Consortium (OGC) Web service framework as collection of geospatial Web services and encodings have
2013 Fourth International Conference on Computing for Geospatial Research and Application, 2013
ABSTRACT form only given: Today a huge amount of geospatial data is being created, collected and ... more ABSTRACT form only given: Today a huge amount of geospatial data is being created, collected and used more than ever before. The ever increasing observations and measurements of geo-sensor networks, satellite imageries, point clouds from laser scanning, geospatial data of Location Based Services (LBS) and location-based social networks has become a serious challenge for data management and analysis systems. Traditionally, Relational Database Management Systems (RDBMS) were used to manage and to some extent analyze the geospatial data. Nowadays these systems can be used in many scenarios but there are some situations when using these systems may not provide the required efficiency and effectiveness. More specifically when the geospatial data has high volume, high frequency of change (in both data content and data structure) and variety of structures, the conventional data storage systems cannot provide needed efficiency in online systems in terms of performance and scalability. In these situations, NoSQL solutions can provide the efficiency necessary for applications using geospatial data. This paper provides an overview of the characteristics of geospatial big data, possible solutions for managing and processing them. Then the paper provides an overview of the major types of NoSQL solutions, their advantages and disadvantages and the challenges they present in managing geospatial big data. Then the paper elaborates on serving geospatial data using standard geospatial web services with a NoSQL XML database as a backend.
Time is a basic measure used to quantify the motions of objects, to compare the durations of even... more Time is a basic measure used to quantify the motions of objects, to compare the durations of events, and to sequence events. Temporal behaviors of spatial objects have occupied geoinformatic’s minds and this motivation can be seen in temporal GIS (Geospatial Information System) and navigation. This article focuses on a mathematical abstraction for calculating periods of time. Uncertainty in temporal intervals is considered and temporal relationships are defined based on rough set theory as a powerful device to handle the indeterminate time interval.
Proceedings of the Third ACM SIGSPATIAL International Workshop on Querying and Mining Uncertain Spatio-Temporal Data - QUeST '12, 2012
ABSTRACT Navigation services, such as used in cars, are widely used nowadays. Many applications, ... more ABSTRACT Navigation services, such as used in cars, are widely used nowadays. Many applications, positioning technologies and techniques have been developed to make navigation systems easier to use. However current navigation systems suffer from different aspects of uncertainty such as incomplete or inaccurate positional data. This paper reviews aspects of uncertainty which should be considered when developing navigation systems. A proposed approach, based on rough set and fuzzy set theories, is explained and implemented in an application.
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Papers by Pouria Amirian