Now showing items 1-11 of 11

    • Aggregation languages for moving object and places of interest 

      Gómez, Leticia Irene; Kuijpers, Bart; Vaisman, Alejandro Ariel (2008)
      "We address aggregate queries over GIS data and moving object data, where non-spatial information is stored in a data warehouse. We propose a formal data model and query language to express complex aggregate queries. Next, ...
    • An algebra for OLAP 

      Kuijpers, Bart; Vaisman, Alejandro Ariel (2017)
      "Online Analytical Processing (OLAP) comprises tools and algorithms that allow querying multidimensional databases. It is based on the multidimensional model, where data can be seen as a cube, where each cell contains one ...
    • Categorical sequential pattern mining in a spatio-temporal environment 

      Gómez, Leticia Irene (c2009)
      "En esta tesis argumentamos que la información de trayectorias también puede ser integrada con datos GIS y OLAP, generando un marco poderoso de análisis".
    • Efficient analytical queries on semantic web data cubes 

      Etcheverry, Lorena; Vaisman, Alejandro Ariel (2017-12)
      "The amount of multidimensional data published on the semantic web (SW) is constantly increasing, due to initiatives such as Open Data and Open Government Data, among other ones. Models, languages, and tools, that allow ...
    • From conceptual to logical ETL design using BPMN and relational algebra 

      Awiti, Judith; Vaisman, Alejandro Ariel; Zimányi, Esteban (2019)
      "Extraction, transformation, and loading (ETL) processes are used to extract data from internal and external sources of an organization, transform these data, and load them into a data warehouse. The Business Process ...
    • Mobility data warehouses 

      Vaisman, Alejandro Ariel; Zimányi, Esteban (2019)
      "The interest in mobility data analysis has grown dramatically with the wide availability of devices that track the position of moving objects. Mobility analysis can be applied, for example, to analyze traffic flows. To ...
    • Modelling and querying star and snowflake warehouses using graph databases 

      Vaisman, Alejandro Ariel; Besteiro, María Florencia; Valverde Melito, Maximiliano Javier (2019)
      "In current “Big Data” scenarios, graph databases are increasingly being used. Online Analytical Processing (OLAP) operations can expand the possibilities of graph analysis beyond the traditional graphbased computation. ...
    • Un modelo y lenguaje de consulta genérico para el procesamiento analítico online y su aplicación a campos de datos continuos 

      Gómez, Silvia Alicia (2014)
      "El análisis de los datos históricos es crucial para la gestión estratégica y la toma de decisiones en diferentes tipos de organizaciones, desde empresas comerciales hasta entidades gubernamentales o civiles. A diferencia ...
    • Performing OLAP over graph data: query language, implementation, and a case study 

      Gómez, Leticia Irene; Kuijpers, Bart; Vaisman, Alejandro Ariel (2017)
      "In current Big Data scenarios, traditional data warehousing and Online Analytical Processing (OLAP) operations on cubes are clearly not sufficient to address the current data analysis requirements. Nevertheless, OLAP ...
    • Piet: a GIS-OLAP implementation 

      Vaisman, Alejandro Ariel; Gómez, Leticia Irene; Kuijpers, Bart; Escribano, Ariel (2007)
      "Data aggregation in Geographic Information Systems (GIS) is a desirable feature, although only marginally present in commercial systems, which also fail to provide integration between GIS and OLAP (On Line Analytical ...
    • Temporal SOLAP: query language, implementation, and a use case 

      Bisceglia, Pablo; Gómez, Leticia Irene; Vaisman, Alejandro Ariel (2012)
      "The integration of Geographic Information Systems (GIS) and On-Line Analytical Processing (OLAP), denoted SOLAP, is aimed at exploring and analyzing spatial data. In real-world SOLAP applications, spatial and non-spatial ...