Open AccessProceedings Article
Embedding vague spatial objects into spatial databases using the VagueGeometry abstract data type
Anderson Chaves Carniel,Ricardo Rodrigues Ciferri,Cristina Dutra de Aguiar Ciferri +2 more
- 01 Nov 2015
- pp 233-244
TL;DR: Experimental results show that VagueGeometry improved the performance of spatial queries with vague topological predicates from 23% up to 84% if compared with functionalities available in current spatial databases.
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Abstract: Spatial vagueness has been required by geoscientists to handle vague spatial objects, i.e., spatial objects that do not have exact locations, strict boundaries, or sharp interiors. However, there is a gap in the literature in how to handle these objects in spatial database management systems since they mainly provide support to crisp spatial objects, i.e., objects that have well-defined locations, boundaries, and interiors. In this paper, we fill this gap by proposing VagueGeometry, a novel abstract data type that handles vague spatial objects, includes an expressive set of vague spatial operations, and its implementation is open source. Experimental results show that VagueGeometry improved the performance of spatial queries with vague topological predicates from 23% up to 84% if compared with functionalities available in current spatial databases.
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Citations
•Journal Article
Handling fuzzy points and fuzzy lines using the FuzzyGeometry abstract data type
TL;DR: The abstract data type FuzzyGeometry is proposed to handle fuzzy spatial objects in the PostgreSQL DBMS and offers management for fuzzy point objects and fuzzy line objects as well as provides several operations to handle them.
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•Journal Article
The VagueGeometry Abstract Data Type
TL;DR: This article proposes VagueGeometry, a novel abstract data type that allows users to manipulate vague spatial objects in spatial applications and GIS and improves the performance of spatial queries with vague topological predicates if compared with functionalities available in current spatial databases.
2
References
Modeling vague spatial data warehouses using the VSCube conceptual model
Thiago Luís Lopes Siqueira,Cristina Dutra de Aguiar Ciferri,Valéria Cesário Times,Ricardo Rodrigues Ciferri +3 more
TL;DR: This paper proposes the VSCube conceptual model, based on the cube metaphor, to represent and manipulate shape vagueness in spatial data warehouses, allowing the analysis of business scores related to vague spatial data, and therefore improving the decision-making process.
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Implementation of vague spatial objects
Pawalai Kraipeerapun
- 01 Jan 2004
TL;DR: This thesis deals with the storage and manipulation of vague spatial objects in a geographical information system (GIS) software called GRASS, and three new file types are created to extend the existing GRASS file types for supporting vague objects.
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A system of types and operators for handling vague spatial objects
TL;DR: In this paper, the authors present a method for representing and analysing vague spatial phenomena, which requires vague objects and operators, whereas current GIS and spatial databases can only handle c...
Querying vague spatial objects in databases with vasa
Alejandro Pauly
- 01 Jan 2007
TL;DR: A Vague Spatial Algebra (VASA) capable of handling spatial vagueness is presented and the appropriate concepts for enabling database querying that can help exploit the power of the vague spatial data model are introduced.
Approximate topological relations
TL;DR: In this paper, approximate topological relations are destined to capture boundary uncertainty, variations over time, proximity measures, and vector-raster representations.