Abstract
Abstract. Different applications or users need different abstraction of spatial models, dimensionalities and specification of their datasets due to variations of required analysis and output. Various approaches, data models and data structures are now available to support most current application models in Geographic Information System (GIS). One of the focuses trend in GIS multi-dimensional research community is the implementation of scale dimension with spatial datasets to suit various scale application needs. In this paper, 2D spatial datasets that been scaled up as the third dimension are addressed as 2D+scale (or 3D-scale) dimension. Nowadays, various data structures, data models, approaches, schemas, and formats have been proposed as the best approaches to support variety of applications and dimensionality in 3D topology. However, only a few of them considers the element of scale as their targeted dimension. As the scale dimension is concerned, the implementation approach can be either multi-scale or vario-scale (with any available data structures and formats) depending on application requirements (topology, semantic and function). This paper attempts to discuss on the current and new potential applications which positively could be integrated upon 3D-scale dimension approach. The previous and current works on scale dimension as well as the requirements to be preserved for any given applications, implementation issues and future potential applications forms the major discussion of this paper.
Highlights
Geographic Information System (GIS) with scale dimension has gained popularity in recent years due to the demands from users and applications
The implementations of scale dimension require the selection of a data model and data structure; especially for vario-scale approach
Previous research papers has shown that most successful implementation of scale dimension started by introducing multiscale concepts in storing line simplification such as Multi-scale Line tree (Jones and Abraham, 1986), Arc-tree (Günther, 1988), and Binary Line Generalization (BLG) (Oosterom, 1990)
Summary
GIS with scale dimension has gained popularity in recent years due to the demands from users and applications. The implementations of scale dimension require the selection of a data model and data structure; especially for vario-scale approach. We have successfully implemented the vario-scale concept in the DHE structure using a small experimental land cover dataset. This 3D-scale DHE model able to support topology (navigation between objects of the same and different level of details (LoD), local modification, minimum redundancy of dataset and workload, capability to store attribute, topology and geometry within a single data structure. The last section of this paper will be the discussion and remark from this study
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