Download Advances in Spatial and Temporal Databases: 7th by Jianwen Su, Haiyan Xu, Oscar H. Ibarra (auth.), Christian S. PDF

By Jianwen Su, Haiyan Xu, Oscar H. Ibarra (auth.), Christian S. Jensen, Markus Schneider, Bernhard Seeger, Vassilis J. Tsotras (eds.)

The 7th overseas Symposium on Spatial and Temporal Databases (SSTD 2001), held in Redondo seashore, CA, united states, July 12{15, 2001, introduced jointly best researchers and builders within the quarter of spatial, temporal, and spatio-temporal databases to debate the state-of-the-art in spatial and temporal info administration and purposes, and to appreciate the demanding situations and - seek instructions within the advancing quarter of knowledge administration for relocating gadgets. The symposium served as a discussion board for disseminating examine in spatial and temporal information administration, and for maximizing the interchange of information between researchers from the demonstrated spatial and temporal database com- nities. The alternate of analysis rules and effects not just contributes to the tutorial enviornment, but additionally bene ts the person and advertisement groups. SSTD 2001 used to be the 7th within the sequence of symposia that all started in Santa Barbara a dozen years in the past and has considering been held each years, in Zurich, Singapore, Portland (Maine), Berlin, and Hong Kong. by means of 1999, the sequence had develop into good validated because the best overseas discussion board dedicated exclusively to spatial database administration, and it was once made up our minds to increase the scope of the sequence to additionally hide temporal database administration. This prolonged scope was once selected due, partially, to the expanding significance of analysis that considers spatial and temporal elements jointly.

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Extra info for Advances in Spatial and Temporal Databases: 7th International Symposium, SSTD 2001 Redondo Beach, CA, USA, July 12–15, 2001 Proceedings

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The query Q consists of all these rectangles. Then we retrieve the set S of trajectories that intersect this set of rectangles. The refinement step is as follows. M of route segments that the object travels between starttime and endtime. If the object is not alive on all these route segments, then T is eliminated from S. M is a subset of M. (2Bt): ALONG SHORTEST PATH / SOMETIME BETWEEN, assuming that the cost 5 is given in terms of travel time: The filter step is the same as in 2At. The refinement step is as follows.

Here, spatial objects are associated with two temporal aspects, and a set of operators for querying is provided. However, this model does not provide an expressive type system, but basically proposes only a single type, termed ST-complex, with a limited set of operations. In addition, two papers exist that consider spatiotemporal data as a sequence of spatial snapshots and in this context address implementation issues related to the representation of discrete changes of spatial regions over time [12].

J. Egenhofer 1995) to model direction relations. These methods are crude approximations that often lead to incorrect directions when concave region objects are involved. The directionrelation (Goyal and Egenhofer, in press) overcomes these deficiencies as it avoids generalizations to points or approximations by rectangles. The method also extends to other geometric types such as lines and points (Goyal and Egenhofer 2000). This paper develops a computational method for assessing similarity of cardinal directions that are modeled with the detailed direction-relation matrix (Goyal and Egenhofer, in press).

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