O. Gunther and A. Buchmann. Research issues in spatial databases. SIGMOD Record, 19:61--8, 1990.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....treatment of the subject is divided into point data, curvilinear data, volume data, and data that consist of a collection of small rectangles (a typical VLSI application) The emphasis is on hierarchical methods that rely on a recursive decomposition of the indexed space into disjoint subspaces. GB90] identifies four major application domains of spatial data management. These are mechanical CAD (described as the application with the most demanding geometrical requirements ) and constructive solid geometry, VLSI CAD, vision systems (in robotics and manufacturing) and geographic and ....

O. Gunther and A. Buchmann. Research Issues in Spatial Databases. ACM SIGMOD Record, 19(4):61--68, December 1990.

....two main directions are obvious: First, we have to improve the retrieval of spatial objects and second, we have to speed up geometric algorithms in order to answer complex spatial queries efficiently. 2 The first goal can be reached using suitable spatial access methods (see [SW 92] and [GB 90] Such methods should efficiently support the selective spatial access to single objects as well as set oriented access to large sets of objects caused by large data requests from secondary storage. In view of permanently increasing main memory sizes, the fast transfer of large, spatially ....

Gnther O., Buchmann A.: `Research Issues in Spatial Databases', Proc. IEEE CS Bulletin on Data Engineering, Vol. 13, No. 4, 1990, pp. 35-42.

....the irregularly shaped spatial object. The MBRs allow appropriate proximity query processing by preserving the spatial locality and by eliminating many potential intersection tests quickly. For instance, two objects will not intersect if their MBRs do not intersect. Most approximation methods[1 3] based on traditional spatial access methods fall under this approach. The second approach uses a more accurate approximation than the MBR, such as a convex container, to approximate a spatial object. This approach is expected to improve the performance of query processing by increasing the ....

O. G6nther, A. Buchmann, "Research Issues in Spatial Databases," ACM SIGMOD RECORD, Vol. 19, No. 4, 1990, pp. 61-68.

....previous schemata is required. Schema Versioning A database system accommodates schema versioning if it allows the querying of all data, both retrospectively and prospectively, through user definable version interfaces. The development of spatial and, more recently, spatio temporal databases [1, 9, 10, 16] is an important research topic. Recent research has shown that there are similar problems that could be considered as the spatial equivalent to the problems experienced by time related data and changing schemata and for which temporal databases and schema versioning provide some solutions. For ....

Gunther, O. and Buchmann, A. Research Issues in Spatial Databases. SIGMOD Rec., 19(4):61-68. 1990.

....for previous schemata is required. Schema Versioning. A database system accommodates schema versioning if it allows the querying of all data, both retrospectively and prospectively, through user de nable version interfaces. The development of spatial and, more recently, spatio temporal databases [1, 11, 12, 17] is an important research topic. Recent research has shown that there are similar problems that could be considered as the spatial equivalent to the problems experienced by time varying data and changing schemata and for which temporal databases and schema versioning provide some solutions. For ....

Gunther, O. and A. Buchmann: 1990, `Research Issues in Spatial Databases'. SIGMOD Record 19(4), 61-68.

....previous schemata is required. Schema Versioning A database system accommodates schema versioning if it allows the querying of all data, both retrospectively and prospectively, through user definable version interfaces. The development of spatial and, more recently, spatiotemporal databases [1, 9, 10, 16] is an important research topic. Recent research has shown that there are similar problems that could be considered as the spatial equivalent to the problems experienced by time related data and changing schemata and for which temporal databases and schema versioning provide some solutions. For ....

Gunther, O. and Buchmann, A. Research Issues in Spatial Databases. SIGMOD Rec., 19(4):61-68. 1990.

....treatment of the subject is divided into point data, curvilinear data, volume data, and data that consist of a collection of small rectangles (a typical VLSI application) The emphasis is on hierarchical methods that rely on a recursive decomposition of the indexed space into disjoint subspaces. GB90] identifies four major application domains of spatial data management. These are mechanical CAD (described as the application with the most demanding geometrical requirements ) and constructive solid geometry, VLSI CAD, vision systems (in robotics and manufacturing) and geographic and ....

O. Gunther and A. Buchmann. Research Issues in Spatial Databases. ACM SIGMOD Record, 19(4):61--68, December 1990.

....and which are the typical features and properties of spatial data manipulation languages We believe that, after a few years of experiments, it is now time to investigate deeper those characteristics that distinguish the spatial database systems from the traditional ones. As the authors say in [32]: The challenge for the developers of DBMSs with spatial capabilities lies not so much in providing yet another special purpose data structure that is marginally faster when used in a particular application, but in defining abstractions and architectures to implement systems that offer generic ....

O.GĻunther and A. Buchmann. Research issues in spatial databases. Sigmod Record, 19(4):61--68, 1990.

....[T ] index : N 1 items 6= h i ) index 2 domitems Push Delta(index ) items 6= h i ) index 0 = index 1 . 3 REPRESENTATION OF TERRAIN 3. 1 Spatial Relations and Simplices Various papers have mentioned the lack of a coherent, rigorous theory underpinning geographical information systems [4]. A few recent papers have used simplicial complexes [8, 9] to model essential spatial relations [3, 13] Simplicial complexes are obtained by pasting together basic building blocks called simplices. A 0 simplex is point, a 1 simplex is a line segment, a 2 simplex is a triangle, and so forth. ....

O. Gunther and A. Buchmann. Research issues in spatial databases. SIGMOD Record, 19:61--8, 1990.

....[7, 15] are applicable to our context. However, temporal languages other than FTL can be used to query MOST databases. Nevertheless, when using any other language, the query processing algorithm will have to be modified to handle dynamic attributes. Another relevant area is spatial databases (see [28, 18, 11, 9, 10, 12, 17]) Work in this area can be used for defining and processing the spatial operators discussed in section 3. Our work is also relevant to uncertainty in databases (see [1, 25] for surveys) However, as far as we know this area has so far addressed complementary issues to the ones in this paper. ....

O. Guenth and A. Buchmann. Research issues in spatial databases. SIGMOD Rec., 19(4), 1990.

....extending SQL in an application dependent way. Current efforts in spatial database systems, however, aim at developing systems that are specifically suited to deal with spatial information, but which are nevertheless application independent. This latter goal was set out in the following quote of [12]: The challenge for the developers of DBMSs with spatial capabilities lies not so much in providing yet another special purpose data structure that is marginally faster when used in a particular application, but in defining abstractions and architectures to implement systems that offer generic ....

O. GĻunther and A. Buchmann, Research Issues in Spatial Databases, in Sigmod Record, vol. 19, 4, 61-68, 1990.

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O. Gunther and A. Buchmann. Research issues in spatial databases. SIGMOD Record, 19:61--8, 1990.

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Gunther, O. and Buchmann, A. Research Issues in Spatial Databases. SIGMOD Rec., 19(4):61-68. 1990.

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O. Gunther, A. Buchmann: `Research Issues in Spatial Databases', SIGMOD RECORD, Vol.19, No.4, 61-68, 1990.

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Gunther, O.; Buchmann, A. (1991). Research Issues in Spatial Databases. SIGMOD RECORD 19(4), pages 61--68.

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