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 major researchers and builders within the quarter of spatial, temporal, and spatio-temporal databases to debate the cutting-edge in spatial and temporal information administration and functions, and to appreciate the demanding situations and - seek instructions within the advancing sector of information administration for relocating gadgets. The symposium served as a discussion board for disseminating study in spatial and temporal info administration, and for maximizing the interchange of information between researchers from the verified spatial and temporal database com- nities. The alternate of study rules and effects not just contributes to the educational area, but additionally bene ts the person and advertisement groups. SSTD 2001 used to be the 7th within the sequence of symposia that began in Santa Barbara a dozen years in the past and has for the reason that been held each years, in Zurich, Singapore, Portland (Maine), Berlin, and Hong Kong. by means of 1999, the sequence had develop into good proven because the most efficient foreign discussion board dedicated completely to spatial database administration, and it used to be made up our minds to increase the scope of the sequence to additionally conceal temporal database administration. This prolonged scope was once selected due, partly, to the expanding significance of analysis that considers spatial and temporal points jointly.

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Additional 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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G. taxis). An important concept here is the trajectory of a moving object, which, intuitively, gives the route of the object along with the time at which the object will be at each point on the route. Moving Object. The route of a moving object O is specified by giving the starting address or (x,y) coordinate (start_point), the starting time and the ending address or (x,y) coordinate (end_point). An external routine available in most existing Geographic Information Systems, and which we assume is given a priori, computes the shortest cost (distance or travel-time) path in the map graph.

ALONG EXISTING PATH or 2. ALONG SHORTEST PATH) and time related quantifiers (A. ALWAYS BETWEEN or B. SOMETIME BETWEEN). 1A: the condition is satisfied for object if every point on o's route between starttime and endtime is within route-distance s or route-travel-time t from R (observe that using the GDT map format one can compute both travel time and distance as different cost measures). Remember, route distance (route travel time) between two points is the distance (travel time) along the current trajectory, in the forward (increasing time) direction.

Semantics returns TRUE if shape1 contains shape2 returns TRUE shape1 intersect shape2 returns a point on a polyline, the route distance of which is "dist" length units away. selects the features that intersect “shape” returns the travel time along the polyline p in time units A Spatiotemporal Model and Language for Moving Objects on Road Networks 35 Although Arcview/Informix do not use the notion of time, they use the notion of cost. So given GDT maps, cost can be interpreted as travel-time or distance.

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