Search

Search Results

• 1. [Article] Modeling Cadastral Spatial Relationships

  Research exploring the object-oriented paradigm as a tool with which to model location of objects in maps is reported. The research led us into three areas: the use of an object-oriented language, Smalltalk.-80 ...

  Citation × Citation Citation Abstract Copy Title: Modeling Cadastral Spatial Relationships Author: Dueker, Kenneth, Kjerne, Daniel Year: 1988 Research exploring the object-oriented paradigm as a tool with which to model location of objects in maps is reported. The research led us into three areas: the use of an object-oriented language, Smalltalk.-80 to model cadastral location using the object-oriented paradigm. study of the development of spatial information systems, such as engineering design and computer-aided design(CAD) database systems based on object-oriented ideas, to see how that approach might be useful for developing a mapping system. Finally, the conceptual exploration of how an object-oriented approach might facilitate linkages of location among layers of a land information system. Future research is needed to produce a more convincing prototype of a cadastral map. Since Smalltalk is a single-user, programming language environment, it does not produce objects that persist beyond the existence of the program in which they are created and manipulated. Computer-aided cadastral mapping requires an environment capable of working with persistent objects accessible by multiple users. This led to an investigation of present and future directions in database system development. We see a productive course in continuing researeh cm the object-oriented programming language. prototype, adding more kinds of locational methods, improving the interface, and studying alternative structures to the Dictionary-based Cadastral Map. Meanwhile, by keeping an eye on the development of object-oriented database systems, it should be possible to find one that can be made to manipulate spatial information. Fmally, we hope to continue exploration of how the object-oriented paradigm will be useful, in mapping and geographic analysis generally. While the research reported here has emphasized cadastral objects, the paradigm for locational determination has a broad potential for application. Shared or common boundaries among layers or data· types can be addressed by an object-oriented database approach, which lends itself to better handling of the interrelationships among objects of different types. Title: Modeling Cadastral Spatial Relationships Author: Dueker, Kenneth, Kjerne, Daniel Year: 1988 Research exploring the object-oriented paradigm as a tool with which to model location of objects in maps is reported. The research led us into three areas: the use of an object-oriented language, Smalltalk.-80 to model cadastral location using the object-oriented paradigm. study of the development of spatial information systems, such as engineering design and computer-aided design(CAD) database systems based on object-oriented ideas, to see how that approach might be useful for developing a mapping system. Finally, the conceptual exploration of how an object-oriented approach might facilitate linkages of location among layers of a land information system. Future research is needed to produce a more convincing prototype of a cadastral map. Since Smalltalk is a single-user, programming language environment, it does not produce objects that persist beyond the existence of the program in which they are created and manipulated. Computer-aided cadastral mapping requires an environment capable of working with persistent objects accessible by multiple users. This led to an investigation of present and future directions in database system development. We see a productive course in continuing researeh cm the object-oriented programming language. prototype, adding more kinds of locational methods, improving the interface, and studying alternative structures to the Dictionary-based Cadastral Map. Meanwhile, by keeping an eye on the development of object-oriented database systems, it should be possible to find one that can be made to manipulate spatial information. Fmally, we hope to continue exploration of how the object-oriented paradigm will be useful, in mapping and geographic analysis generally. While the research reported here has emphasized cadastral objects, the paradigm for locational determination has a broad potential for application. Shared or common boundaries among layers or data· types can be addressed by an object-oriented database approach, which lends itself to better handling of the interrelationships among objects of different types. Close

• 2. [Article] Issues in Design of a Multipurpose Cadastre

  This paper summarizes a discussion of some of the technical issues which appeared in a report prepared during January-July 1985, by a team of researchers from Port.land State University's Center for Urban ...

  Citation × Citation Citation Abstract Copy Title: Issues in Design of a Multipurpose Cadastre Author: Dueker, Kenneth, Kjerne, Daniel, Conrad, Lawrence M. Year: 1985 This paper summarizes a discussion of some of the technical issues which appeared in a report prepared during January-July 1985, by a team of researchers from Port.land State University's Center for Urban Studies under a contract for the Department of Assessment and Taxation of Multnomah County, Oregon. The complete report also covered user needs as identified through a series of interviews of agencies making use of assessor maps. At some time in the next two or three years, Multnomah County will be eligible for assistance from the Oregon State Department of Revenue (DOR) in reconstructing its cadastral mapping system. Both the county and the DOR are vitally interested in upgrading their respective capabilities for handling cadastral data. First, though, it will be necessary to thoroughly understand just what is involved in developing and maintaining cadastral maps, and whether the multipurpose cadastre, or a broader land information system, is warranted at this time. The research, and resulting report, are a first step in that process of gaining understanding. Title: Issues in Design of a Multipurpose Cadastre Author: Dueker, Kenneth, Kjerne, Daniel, Conrad, Lawrence M. Year: 1985 This paper summarizes a discussion of some of the technical issues which appeared in a report prepared during January-July 1985, by a team of researchers from Port.land State University's Center for Urban Studies under a contract for the Department of Assessment and Taxation of Multnomah County, Oregon. The complete report also covered user needs as identified through a series of interviews of agencies making use of assessor maps. At some time in the next two or three years, Multnomah County will be eligible for assistance from the Oregon State Department of Revenue (DOR) in reconstructing its cadastral mapping system. Both the county and the DOR are vitally interested in upgrading their respective capabilities for handling cadastral data. First, though, it will be necessary to thoroughly understand just what is involved in developing and maintaining cadastral maps, and whether the multipurpose cadastre, or a broader land information system, is warranted at this time. The research, and resulting report, are a first step in that process of gaining understanding. Close