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http://hdl.handle.net/1942/9496
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DC Field | Value | Language |
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dc.contributor.author | HAESEVOETS, Sofie | - |
dc.contributor.author | KUIJPERS, Bart | - |
dc.date.accessioned | 2009-04-16T13:09:42Z | - |
dc.date.issued | 2008 | - |
dc.identifier.uri | http://hdl.handle.net/1942/9496 | - |
dc.description.abstract | In spatial databases, incompatibilities often arise due to different choices of origin or unit of measurement(e.g centimeters versus inches). By representing and querying the data in an affine-invariant manner, we can avoid these incompatibilities. In practice, spatial(resp.,spatio-temporal) data is often represented as a finite union of triangles(resp.,moving triangles). As two arbitrary triangles are equal up to a unique affinity of the plane, they seem perfect candidates as basic units for an affine-invariant query language. We propose a so-called "triangle logic", a query language that is affine-generic and has triangles as basic elements. We show that this language has the same expressive power as the affine-generic fragment of first-order logic ove the reals on triangle databases. We illustrate that the proposed language is simple and intuitive. It can also serve as a first step towards a "moving-triangle logic" for spatio-temporal data. | - |
dc.language.iso | en | - |
dc.publisher | ArXiv (Corr) | - |
dc.title | A triangle-based logic for affine-invariant querying of spatial and spatio-temporal data | - |
dc.type | Research Report | - |
local.format.pages | 43 | - |
local.bibliographicCitation.jcat | R2 | - |
dc.description.notes | http://arxiv.org/abs/0810.5725 | - |
local.type.specified | Research Report | - |
dc.bibliographicCitation.oldjcat | B4 | - |
item.accessRights | Open Access | - |
item.contributor | HAESEVOETS, Sofie | - |
item.contributor | KUIJPERS, Bart | - |
item.fullcitation | HAESEVOETS, Sofie & KUIJPERS, Bart (2008) A triangle-based logic for affine-invariant querying of spatial and spatio-temporal data. | - |
item.fulltext | With Fulltext | - |
Appears in Collections: | Research publications |
Files in This Item:
File | Description | Size | Format | |
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0810.5725v2.pdf | 427.76 kB | Adobe PDF | View/Open |
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