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Registro Completo
Biblioteca(s): |
Embrapa Agricultura Digital. |
Data corrente: |
15/02/2002 |
Data da última atualização: |
05/09/2006 |
Autoria: |
NASCIMENTO, M. A.; SILVA, J. R. O.; THEODORIDIS, Y. |
Afiliação: |
EMBRAPA-CNPTIA; UNICAMP; NATIONAL TECHNICAL UNIVERSITY OF ATHENS. |
Título: |
Access structures for moving points. |
Ano de publicação: |
1998 |
Fonte/Imprenta: |
Campinas: UNICAMP, 1998. |
Páginas: |
23 p. |
Série: |
Relatorio Tecnico IC-98-34). |
Idioma: |
Inglês |
Conteúdo: |
Several applications require management of data which is spatially dynamic, e.g., tracking of battle ships or moving cells in a blood sample. The capability of handling the temporal aspect, i.e., the history of such type of data, is also important. This paper presents and evaluates three temporal extensions of the R-tree, the 3D R-tree, the 2+3 R-tree and the HR-tree, wich are capable of indexing spatiotemporal data. Our experiments have shown that the while the HR-tree was the larger structure, its query processing cost was over 50% smaller then the ones yielded by the 3D R-tree and the 2+3 R-tree. Also compared to the (non-practical) approach of storing one R-tree for each of the spatial database states it offered the same query processing cost, saving around one third of storage space. |
Palavras-Chave: |
Structures for moving points. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01241nam a2200169 a 4500 001 1008044 005 2006-09-05 008 1998 bl uuuu t 00u1 u #d 100 1 $aNASCIMENTO, M. A. 245 $aAccess structures for moving points. 260 $aCampinas: UNICAMP$c1998 300 $a23 p. 490 $aRelatorio Tecnico IC-98-34). 520 $aSeveral applications require management of data which is spatially dynamic, e.g., tracking of battle ships or moving cells in a blood sample. The capability of handling the temporal aspect, i.e., the history of such type of data, is also important. This paper presents and evaluates three temporal extensions of the R-tree, the 3D R-tree, the 2+3 R-tree and the HR-tree, wich are capable of indexing spatiotemporal data. Our experiments have shown that the while the HR-tree was the larger structure, its query processing cost was over 50% smaller then the ones yielded by the 3D R-tree and the 2+3 R-tree. Also compared to the (non-practical) approach of storing one R-tree for each of the spatial database states it offered the same query processing cost, saving around one third of storage space. 653 $aStructures for moving points 700 1 $aSILVA, J. R. O. 700 1 $aTHEODORIDIS, Y.
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