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Browsing by Author "Bertolotto, Michela"

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Adaptive management of multigranular spatio-temporal object attributes

Camossi, Elena ; Bertino, Elisa ; Guerrini, Giovanna ; Bertolotto, Michela (Purdue University. Center for Education and Research in Information Assurance and Security, 2009-04-08)

In applications involving spatio-temporal modelling, granularities of data may have to adapt according to the evolving semantics and significance of data. To address such a problem, in this paper we define ST2 ODMGe, a ...
Adaptive management of multigranular spatio-temporal object attributes

Camossi, Elena ; Bertino, Elisa ; Guerrini, Giovanna ; Bertolotto, Michela (Springer-Verlag, 2009)

In applications involving spatio-temporal modelling, granularities of data may have to adapt according to the evolving semantics and significance of data. In this paper we define ST2 ODMGe, a multigranular spatio-temporal ...
A comparison of open source geospatial technologies for web mapping

Ballatore, Andrea ; Tahir, Ali ; McArdle, Gavin ; Bertolotto, Michela (Inderscience, 2011)

The past decade has witnessed a steady growth of open source software usage in industry and academia, leading to a complex ecosystem of projects. Web and subsequently geographical information systems have become prominent ...
Geographic Knowledge Extraction and Semantic Similarity in OpenStreetMap

Ballatore, Andrea ; Bertolotto, Michela ; Wilson, David C. (Springer, 2012-10)

In recent years, a web phenomenon known as Volunteered Geographic Information (VGI) has produced large crowdsourced geographic data sets. OpenStreetMap (OSM), the leading VGI project, aims at building an open-content world ...
A holistic semantic similarity measure for viewports in interactive maps

Ballatore, Andrea ; Wilson, David C. ; Bertolotto, Michela (Springer-Verlag, 2012-04)

In recent years, geographic information has entered the mainstream, deeply altering the pre-existing patterns of its production, distribution, and consumption. Through web mapping, millions of online users utilise spatial ...
Mining Spatio-temporal Data at Different Levels of Detail

Camossi, Elena ; Bertolotto, Michela ; Kechadi, Tahar (Springer-Verlag, 2008-05-08)

In this paper we propose a methodology for mining very large spatio-temporal datasets. We propose a two-pass strategy for mining and manipulating spatio-temporal datasets at different levels of detail (i.e., granularities). ...
Multigranular spatio-temporal models : implementation challenges

Camossi, Elena ; Bertolotto, Michela ; Bertino, Elisa (Association for Computing Machinery (ACM), 2008-11-07)

Multiple granularities provide an essential support for extracting significant knowledge from spatio-temporal datasets at different levels of details. They enable to zoom-in and zoom-out spatio-temporal datasets, thus ...
Multi-granular spatio-temporal object models : concepts and research directions

Bertino, Elisa ; Camossi, Elena ; Bertolotto, Michela (Springer, 2009-07-03)

The capability of representing spatio-temporal objects is fundamental when analysing and monitoring the changes in the spatial configuration of a geographical area over a period of time. An important requirement when ...
An open-source web architecture for adaptive location-based services

McArdle, Gavin ; Ballatore, Andrea ; Tahir, Ali ; Bertolotto, Michela (International Society for Photogrammetry and Remote Sensing, 2010)

As the volume of information available online continues to grow, there is an increasing problem with information overload. This issue is also escalating in the spatial domain as the amount of geo-tagged information expands. ...
Querying Multigranular Spatio-temporal Objects

Camossi, Elena ; Bertolotto, Michela ; Bertino, Elisa (Springer-Verlag, 2008-09-05)

The integrated management of both spatial and temporal components of information is crucial in order to extract significant knowledge from datasets concerning phenomena of interest to a large variety of applications. ...
RecoMap : an interactive and adaptive map-based recommender

Ballatore, Andrea ; McArdle, Gavin ; Kelly, Caitriona ; Bertolotto, Michela (ACM Special Interest Group on Applied Computing, 2010-03)

With the growing availability of geo-referenced information on the Web, the problem of spatial information overload has attracted interest both in the commercial and academic world. In order to tackle this issue, personalisation ...
Semantically enriching VGI in support of implicit feedback analysis

Ballatore, Andrea ; Bertolotto, Michela (Springer-Verlag, 2011-03)

In recent years, the proliferation of Volunteered Geographic Information (VGI) has enabled many Internet users to contribute to the construction of rich and increasingly complex spatial datasets. This growth of geo-referenced ...
The Similarity Jury: Combining expert judgements on geographic concepts

Ballatore, Andrea ; Wilson, David C. ; Bertolotto, Michela (Springer, 2012-10-15)

A cognitively plausible measure of semantic similarity between geographic concepts is valuable across several areas, including geographic information retrieval, data mining, and ontology alignment. Semantic similarity ...
Spatio-temporal multi-granularity : modelling and implementation challenges

Camossi, Elena ; Bertolotto, Michela ; Bertino, Elisa (University College Dublin. School of Computer Science and Informatics, 2009-08)

Multiple spatial and temporal granularities are essential to extract significant knowledge from datasets at different levels of detail: they enable to zoom-in and zoom-out a dataset, enhancing the data modelling flexibility ...
Storage, manipulation, and visualization of LiDAR data

Schön, Bianca ; Bertolotto, Michela ; Laefer, Debra F. ; Morrish, Sean (International Society of Photogrammetry and Remote Sensing, 2009-02)

In recent years, three-dimensional (3D) data has become increasingly available, in part as a result of significant technological progresses in Light Detection and Ranging (LiDAR). LiDAR provides longitude and latitude ...
Three-dimensional spatial information systems : state of the art review

Schön, Bianca ; Laefer, Debra F. ; Bertolotto, Michela ; Morrish, Sean (Bentham Science Publishers, 2009)

A spatial information system (SIS) is critical to the hosting, querying, and analyzing of spatial data sets. The increasing availability of three-dimensional (3D) data (e.g. from aerial and terrestrial laser scanning) and ...