%0 Conference Proceedings
%4 dpi.inpe.br/vagner/2000/07.05.09.57
%2 dpi.inpe.br/vagner/2000/07.05.09.57.04
%T Towards a unified framework for geographical data models
%D 2000
%A Câmara, Gilberto,
%A Monteiro, Antônio Miguel Vieira,
%A Paiva, João Argemiro,
%A Gomes, Jonas,
%A Velho, Luiz,
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto Nacional de Pesquisas Espaciais (INPE)
%@affiliation Instituto de Matemática Pura e Aplicada (IMPA)
%@affiliation Instituto de Matemática Pura e Aplicada (IMPA)
%@electronicmailaddress gilberto@dpi.inpe.br
%@electronicmailaddress miguel@dpi.inpe.br
%@electronicmailaddress miro@dpi.inpe.br
%E Davis, Clodoveu,
%E Figueiredo, Luiz Henrique de,
%E Câmara, Gilberto,
%B Simpósio Brasileiro de GeoInformática, 2 (GEOINFO).
%C São Paulo
%8 12-13 jun. 2000
%I Instituto Nacional de Pesquisas Espaciais (INPE)
%J São José dos Campos
%P 37-44
%S Anais
%1 Sociedade Brasileira de Computação
%X This paper describes a unified framework for the problems of modelling and processing geographical entities. We propose a general definition of geographical objects, and show that the different types of geographical data can be expressed as particular cases of this definition. Furthermore, we present a taxonomy for the various types of GIS operations, defined in terms of the properties of this definition. Our goal is to argue that GIS data types and operations can be defined based on a single formal notion, which encapsulates the GIS concepts of both fields and objects, with important consequences for system and interface design, interoperabilty issues and language proposal.
%@language en
%3 015.pdf