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Rulebased evolution of typed spatiotemporal objects
"... Abstract. This paper describes a model for spatiotemporal objects whose location is fixed, but its boundaries and properties change. We refer to these as evolving objects. We consider cases where the evolution of an object is dependent of its type and propose a rulebased approach for description of ..."
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Cited by 4 (2 self)
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Abstract. This paper describes a model for spatiotemporal objects whose location is fixed, but its boundaries and properties change. We refer to these as evolving objects. We consider cases where the evolution of an object is dependent of its type and propose a rulebased approach for description of spatiotemporal object’s evolution. By developing semantics of typebased evolution, we can keep a detailed history of change. We present an example where the model is able to represent type conversions and recover the evolution history of a set of objects. The model allows answers to questions about causes of change and thus deals with cases not supported by models based on objects of a unique type. 1. General Information A major research topic in GIScience is modelling and representation of geographical objects whose properties change. We distinguish two broad categories of spatiotemporal objects. The first case concerns those objects that change their position and extent continuously. We refer to those as moving objects. Moving objects arise, for example,
The original is available at:
, 2009
"... Solicitase intercâmbio We ask for exchange Publicação Externa – É permitida sua reprodução para interessados. INPE00000TDI/0000 ..."
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Solicitase intercâmbio We ask for exchange Publicação Externa – É permitida sua reprodução para interessados. INPE00000TDI/0000
PUBLICADO POR:
, 2009
"... Tese de Doutorado do Curso de PósGraduação em Computação Aplicada, orientada pelos Drs. Gilberto Câmara, e Lúbia Vinhas, aprovada em 26 de agosto de 2009. Registro do documento original: ..."
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Tese de Doutorado do Curso de PósGraduação em Computação Aplicada, orientada pelos Drs. Gilberto Câmara, e Lúbia Vinhas, aprovada em 26 de agosto de 2009. Registro do documento original:
AN ALGEBRA FOR OPENGIS ® COVERAGES BASED ON TOPOLOGICAL PREDICATES
, 2007
"... Map algebra is a collection of functions for handling spatial datasets where each data contains a set of geometries of the same type which bound to a geographical reference. The current theory for Map Algebra uses ad hoc operators proposed by Dana Tomlin. His proposal has had great practical success ..."
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Map algebra is a collection of functions for handling spatial datasets where each data contains a set of geometries of the same type which bound to a geographical reference. The current theory for Map Algebra uses ad hoc operators proposed by Dana Tomlin. His proposal has had great practical success, and most GIS implementations provide its operations. However, there is a lack of theoretical foundations for the operations proposed in Tomlin’s map algebra. This is a limitation for the proposal of international standards for map algebra. Specifically, the Open Geospatial Consortium’s proposal for handling a map (the coverage data type) lacks a set of functions to manipulate its content. To address this problem, our work proposes a specification for an algebra for Open GIS ® coverages which uses a dimensionextended version of Egenhofer and Herring’s 9intersection predicates to express spatial operations. The proposed coverage algebra includes all Tomlin’s functions, as well as operations that are not part of Tomlin’s algebra, but are useful in practice. Our proposal could be the basis for setting up standard for operations on Open GIS coverages. The use of standards for operations in coverages would be a significant advance for increased interoperability of spatial data 3