This paper presents the conceptual and implementation models to the Middleware Layer of the Multiware Platform that is under development at UNICAMP-University of Campinas, Brazil. This platform combines ideas from both the RM-ODP (Reference Model for Open Distributed Processing) and existent products, like ANSAware and CORBA (Common Object Request Broker Architecture). The platform ooers functi...

The research presented in this paper introduces a user context approach for collaborative and adaptive Geographical Information System (GIS). The proposed model is part of a framework based on a multi-dimensional contextual approach that combines user, geographical and device contexts. The spatial properties of the GIS components categorize different configurations as a support for the derivati...

The Web has become a new medium which can display geographical information in rich forms and offer user-friendly interfaces. One of the promising trends in current Geographical Information System (GIS) is the use of Web 3D technology, especially VRML (Virtual Reality Modeling language). As one of the most fundamental geographical information, terrain information is often presented as the base f...

This paper presents a methodology for the creation of homogeneous demographic regions with geographical information systems (GIS) and computational intelligence. The proposed method is unsupervised fuzzy classification performed by neural networks using the fuzzy Kohonen algorithm. GIS technology offers a powerful set of tools for the input, management, and output of data, whereas computational...

This paper reports on the processing of time series of MODIS NDVI/EVI and LST satellite data in a Geographical Information System (GIS). The required data preparations for the integration of MODIS data in GIS is described with focus on the reprojection from MODIS/Sinusoidal projection to national coordinate systems. To remove low quality pixels, the MODIS quality maps are utilized. We explain s...

This contribution analyses the behavior of two kinds of multiprocessor multidisk storage server architectures for a data-intensive application, namely for spatial queries in geographical information systems (GIS). The two kinds of servers are:: (1) a workstation cluster architecture with multiple processors, multiple disks, and a shared-bus shared-memory architecture ; (2) a distributed-memory ...

Standard webmetrics tools record the IP address of users’ computers, thereby providing fodder for analyses of their geographical location, and for understanding the impact of e-learning and teaching. In this paper, we describe how two web-based educational systems were engineered to collect georeferenced data. This is followed by a description of joining these data with demographic and educatio...

This paper presents an application of the integration between Geographical Information Systems (GIS) and Multi-Criteria Decision Analysis (MCDA) to aid spatial decisions. We present a hypothetical case study to illustrate the GIS–MCDA integration: the selection of the best municipal district of Rio de Janeiro State, Brazil, in relation to the quality of urban life. The best municipal district i...

This paper provides a new representation for fields (continuous surfaces) in Geographical Information Systems (GIS), based on the notion of spatial functions and their combinations. Following Tomlin’s (1990) Map Algebra, the term “Map Calculus” is used for this new representation. In Map Calculus, GIS layers are stored as functions, and new layers can be created by combinations of other functio...

An organizing committee was formed to develop the agenda and work items for those who were invited to participate in this workshop. The committee also provided the National Center for Supercomputing Applications (NCSA) and Open GIS Consortium, Inc. (OGC) with advice and guidance regarding the findings, conclusions, and recommendations contained in this report. The world of geographical spatial ...