In recent years, overpopulation in Iran has created a significant demand for urban land. Iranian land administration system currently relies on two-dimensional (2d) plans to capture, register, and manage vertically st...
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In recent years, overpopulation in Iran has created a significant demand for urban land. Iranian land administration system currently relies on two-dimensional (2d) plans to capture, register, and manage vertically stratified ownership rights. This 2d method leads to issues in representing the rights, restrictions, and responsibilities (RRRs) associated with complex building structures. This study proposes a new approach driven from Building Information Modelling (BIM) to support 3d urban land administration in Iran by considering the critical data requirements for managing ownership spaces in the context of Iranian jurisdiction. The BIM data model was implemented for a case study building in the City of Tehran to demonstrate its feasibility. The proposed BIM-based approach was compared with the traditional 2d system using a questionnaire responded to by land administration experts. This research confirmed that a BIM-based approach could provide significant benefits for 3d urban land administration in Iran.
In the emerging era of information and communication technologies, geotechnology is one of the fastest growing fields. Geo-RdBMS is very important and evolving aspect for GIS, as it can manage large volume of spatial ...
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In the emerging era of information and communication technologies, geotechnology is one of the fastest growing fields. Geo-RdBMS is very important and evolving aspect for GIS, as it can manage large volume of spatial data inside RdBMS. The utilization of RdBMS for geospatial data was one of the important focuses of GIS professionals in last decades to store and manage 2d geo-data. However, the support for 3d geo-data inside RdBMS is still limited and is a challenging task for RdBMS providers. In this study, data organization and performance assessment of 3d geo-data inside RdBMS are carried out. In this process, various file-based3d data models such as CityGML, COLLAdA and KML are migrated to geo-RdBMS to bring entire 3d geo-data in common platform. Various spatial indexing techniques viz. R-Tree, B-Tree, GiST, etc. are applied on these 3d data models and best indexing techniques are studied for 3d GIS operations.
2d cadastre has been in existence for decades and most countries have found it convenient. However, in complex situations it has been found to be inadequate as ownership becomes difficult to realise. 3d cadastre data ...
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Natural landforms are of great importance for a variety of scientific and engineering disciplines. Investigation of landforms can be improved by comparison of features that have similar characteristics, structure and ...
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This paper proposes an approach for data modelling in five dimensions. Apart from three dimensions for geometrical representation and a fourth dimension for time, we identify scale as fifth dimensional characteristic....
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ISBN:
(纸本)9783642152993
This paper proposes an approach for data modelling in five dimensions. Apart from three dimensions for geometrical representation and a fourth dimension for time, we identify scale as fifth dimensional characteristic. Considering scale as an extra dimension of geographic information, fully integrated with the other dimensions, is new. Through a formal definition of geographic data in a conceptual 5d continuum, the data can be handled by one integrated approach assuring consistency across scale and time dimensions. Because the approach is new and challenging, we choose to step-wise studying several combinations of the five dimensions, ultimately resulting in the optimal 5d model. We also propose to apply mathematical theories on multidimensional modelling to well established principles of multidimensional modelling in the geo-information domain. The result is a conceptual full partition of the 3dspace+time+scale space (i.e. no overlaps, no gaps) realised in a 5ddata model implemented in a database Management System.
On the study of the basic characteristics of geological objects and the special requirement for computing 3d geological model, this paper gives an object-oriented3d topologic data model. In this model, the geological...
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On the study of the basic characteristics of geological objects and the special requirement for computing 3d geological model, this paper gives an object-oriented3d topologic data model. In this model, the geological objects are divided into four object classes: point, line, area and volume. The volume class is further divided into four subclasses: the composite volume, the complex volume, the simple volume and the component. Twelve kinds of topological relations and the relateddata structures are designed for the geological objects.
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