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2004
ACM

Time-dependent affine triangulation of spatio-temporal data

11 years 5 months ago
Time-dependent affine triangulation of spatio-temporal data
In the geometric data model [6], spatio-temporal data are modelled as a finite collection of triangles that are transformed by time-dependent affinities. To facilitate querying and animation of spatio-temporal data, we present a normal form for data in the geometric data model. We propose an algorithm for constructing this normal form via a spatiotemporal triangulation of geometric data objects. This algorithm generates new geometric objects that form a partition both in space and in time. A particular property of the proposed partition is that it is invariant under time-dependent affine transformations, and hence independent of the coordinate system chosen when modelling the spatio-temporal data. We can show that our algorithm works correctly and has a polynomial time complexity (in the number of input triangles and the maximal degree of the transformation functions). We also discuss several possible applications of this spatio-temporal triangulation. Categories and Subject Descripto...
Sofie Haesevoets, Bart Kuijpers
Added 11 Nov 2009
Updated 11 Nov 2009
Type Conference
Year 2004
Where GIS
Authors Sofie Haesevoets, Bart Kuijpers
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