Systems for data processing, anaylsis and representation

Allam, Mosaad; Plunkett, Gordon

Bibliographic data

Monograph

Persistent identifier:: 1067490280

Title:: Systems for data processing, anaylsis and representation

Sub title:: ISPRS Commission II Symposium : June 6 - 10, Ottawa, Canada

Scope:: 1 Online-Ressource (XX, 530 Seiten)

Year of publication:: 1994

Place of publication:: Ottawa

Publisher of the original:: The Surveys, Mapping and Remote Sensing, Natural Resources Canada

Identifier (digital):: 1067490280

Illustration:: Illustrationen

Signature of the source:: ZS 312(30,2)

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist aus dem Copyrightjahr ermittelt.

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: Allam, Mosaad; Plunkett, Gordon

Corporations:: Symposium Systems for Data Processing, Analysis and Representation, 1994, Ottawa; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Instrumentation for Data Reduction and Analysis; Kanada, Surveys, Mapping and Remote Sensing Sector

Adapter:: Symposium Systems for Data Processing, Analysis and Representation, 1994, Ottawa; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Instrumentation for Data Reduction and Analysis; Kanada, Surveys, Mapping and Remote Sensing Sector

Founder of work:: Symposium Systems for Data Processing, Analysis and Representation, 1994, Ottawa; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Instrumentation for Data Reduction and Analysis; Kanada, Surveys, Mapping and Remote Sensing Sector

Other corporate:: Symposium Systems for Data Processing, Analysis and Representation, 1994, Ottawa; International Society for Photogrammetry and Remote Sensing; International Society for Photogrammetry and Remote Sensing, Commission Instrumentation for Data Reduction and Analysis; Kanada, Surveys, Mapping and Remote Sensing Sector

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2019

Document type:: Monograph

Collection:: Earth sciences

Chapter

Title:: [Friday, June 10, 1994]

Document type:: Monograph

Structure type:: Chapter

Chapter

Title:: [Joint ISPRS/GIS '94 Plenary V]

Document type:: Monograph

Structure type:: Chapter

Chapter

Title:: Delta-X: A Federated Spatial Information Management System Ekow J. Otoo and Adel Mamhikoff

Document type:: Monograph

Structure type:: Chapter

6 System Status Work on Delta-X is still in progress towards im- plementing a full functional system. Our cur- rent prototype, operates with three DzServer sys- tems: two relational database management sys- tems that execute SQL queries, Ingres and Or- acle, and one simple file system. Several GISs run DxClients that interact with these servers. The frontend, GUI, of Delta-X is completed. The first level display window on invoking Delta-X is showm in Figure 3. Figure 4 shows the display of a vector map from a remote server. The imple- mented systems rely purely on remote procedure calls for its remote operations. The Delta-X project began before serious ini- tiatives with respect to standards for interoper- ability between commercial relational databases were fully specified. Work on standards for in- teroperability in object-oriented database is still ongoing and for standards for interoperability between multi-databases is yet to be drafted. We have since identified close similarity between the multi-database requirements in Delta-X the functional services provide by the Xopen refer- ence model for distributed transaction systems. We are exploring the use of a commercial dis- tributed transaction that meets existing interna- tional standard and satisfies our current opera- tional functions. This, we believe, can be easily adopted to reduce our development time for the multi-database transaction modules of our sys- tem. 7 Conclusion The Delta-X operational paradigms describe a methodology for the integration of multi- database management concepts and data inter- change in a network of heterogenoeus databases. The system as designed is a sufficiently open sys- tem that freely admits new participants, either as new databases management systems or new GIS technology, with minimum overhead. The only essential requirement is that new database or GIS vendors must provide the mapping functions that translate information between their propria- tory data format and our global conceptual data model. We have described the essential functionalities in Delta-X and we have shown the software mod- ules required to be integrated to achieve a suc- cessfull implementation. GIS database develop- ment is an exercise being carried out as national projects in several countries. We believe the ap- proach taken by the Delta-X design will form the reference model by which similar projects will emerge to establish eventually, a global network of GIS databases. References [1] R. et al Ahmed. The pegasus heteroge- neous multidatabase system. Computer, 24(12), Dec. 1991. [2] S. Aronoff. Geographic Information Sys- tems: A Management Perspective. WDL Publ., Ottawa, Canada, 1989. [3] D. Bell and J. Grimson. Distributed Database Systems. Addison-Wesley, Co., 1992. [4] S. Ceri and G. Pelagatti. Dis- tributed Databases: Principles and Sys- tems. McGraw-Hill, Inc., 1984. [5] X/Open Corp. X/open database language specification. Specs. Standard, 1991. [6] E. Duval, H. Olivie, P. O’Hanlon, D. G. Jameson, N. Ismail, S. Wilbur, and R. Beckwith. Managing networked multime- dia data. Computer Graphics, 28(1):15 - 19, Feb. 1994. [7] A. Geist, A Beguelin, J. Dongarra, W. Jiang, R. Manchek, and V. Sunderman. PVM 3 users's guide and reference man- ual. Oak Ridge National Laboratory, Oak Ridge, Tennessee, 37831, May 1993. [8] J. Gray and A. Reuter. Transaction pro- cessing: Concepts and Techniques. Mor- gan Kaufmann, San Mateo, California, 1993. [9] Digital Geographic Information Working Group. DIGEST: Digital Geogaphic In- formation Exchange Standards. Draft Re- port, Enviromental System Research In- stitute, 380 New York Street, Calfornia, Sept. 1990. 510 [13] vai 26; W. los tor ve? arc ING Sur SA. ma Bri!

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