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| 32. |  | MORAES, E.; NASCIMENTO, M. T. Estudo populacional de Symphonia globulifera (Clusiaceae) em dois fragmentos de mata Atlantica de baixada. Serie Tecnica IPEF, Piracicaba, v. 12, n. 32, p. 144, 1998. Edicao das Memorias do Simposio sobre Ecologia e Manejo de Fragmentos Florestais, 2., 1998, Piracicaba. Resumo dos paineis.| Biblioteca(s): Embrapa Florestas. |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Agricultura Digital. Para informações adicionais entre em contato com cnptia.biblioteca@embrapa.br. |
Registro Completo
|
Biblioteca(s): |
Embrapa Agricultura Digital. |
|
Data corrente: |
15/02/2002 |
|
Data da última atualização: |
05/09/2006 |
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Autoria: |
NASCIMENTO, M. A.; SILVA, J. R. O.; THEODORIDIS, Y. |
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Afiliação: |
EMBRAPA-CNPTIA; UNICAMP; NATIONAL TECHNICAL UNIVERSITY OF ATHENS. |
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Título: |
Access structures for moving points. |
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Ano de publicação: |
1998 |
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Fonte/Imprenta: |
Campinas: UNICAMP, 1998. |
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Páginas: |
23 p. |
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Série: |
Relatorio Tecnico IC-98-34). |
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Idioma: |
Inglês |
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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. |
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Palavras-Chave: |
Structures for moving points. |
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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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