Forthcoming articles

 


International Journal of Spatial, Temporal and Multimedia Information Systems

 

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International Journal of Spatial, Temporal and Multimedia Information Systems (2 papers in press)

 

Regular Issues

 

  • The Stick operator : The management of several points of view in a Geographical Information System   Order a copy of this article
    by Géraldine Del Mondo, Michel Mainguenaud 
    Abstract: In this article, we propose the Stick operator which provides a unique point of view from two points of view in the context of a Geographical Information System. It is based on two alphanumeric data models we merge in order to obtain a single data model (i.e., the result of the Stick operator). This operator uses a set of rules defined on characteristics of data models associated with each point of view. These characteristics are based on the links between the spatial dimension and alphanumeric data. It can be used when two different levels of details/abstraction or two sources have to be merged.rnWe rely on a labeled graph to formalize data models and work till the attribute level. The Stick operator takes advantage of characteristics such as the intersection of graphs, the existence of quasi-strongly connected graphs or paths to provide an extended result data model.
    Keywords: semantic alphanumeric data; levels of abstraction; geographical information systems; data model merge; graph data model; database view; database snapshot;.

  • Representing Spatial Objects in Data Warehouses: A Logical Solution   Order a copy of this article
    by Georgia Garani 
    Abstract: Spatial data warehouse logical design involves mainly extending the techniques used in relational logical data warehouse design for the support of spatial objects, i.e. geometric objects in space. Spatial objects can have different geometric granularities and can be found at different hierarchical levels of a dimension in the logical model of a data warehouse. This paper addresses data warehouse logical design considerations for a consolidated representation of spatial and non-spatial data. The novelty of the model presented in this paper is the representation of spatial objects in a logical and semantically effective manner. With this approach, complex spatial objects can be modelled in a generic and user-friendly format. The model also includes ROLAP operations supporting the navigation across different dimensions levels and the execution of queries. The functionality of the model is also provided by a number of example queries.
    Keywords: Spatial Data Warehouse; Spatial Object; Starnest Schema; Logical Modelling; ROLAP; Spatial Data Management; Spatial Nested Dimension; Spatial Attribute; Dimension Level Path; Spatial Query Language.