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VASA: An algebra for vague spatial data in databases

Alejandro Pauly, Markus Schneider
2010 Information Systems  
To support the efficient representation, querying, and manipulation of vague spatial data in a database context, we present a formal data model called vague spatial algebra (VASA).  ...  This algebra comprises a set of vague spatial data types for vague points, vague lines, and vague regions together with a comprehensive collection of vague spatial operations and vague topological predicates  ...  The goal of this article is the design, definition, and implementation of an object model for two-dimensional, vague spatial data, called vague spatial algebra (VASA), such that a DBMS data model and its  ... 
doi:10.1016/j.is.2009.05.003 fatcat:jzwcl3geivb2xehjbdtwx43qle

Querying Vague Spatial Objects in Databases with VASA [chapter]

Markus Schneider, Alejandro Pauly
2008 Quality Aspects in Spatial Data Mining  
In this paper we present a Vague Spatial Algebra (VASA) capable of handling spatial vagueness.  ...  We introduce the appropriate concepts for enabling database querying that exploits the power of the vague spatial data model.  ...  For the treatment of vague spatial objects, our Vague Spatial Algebra (VASA), which can be embedded into databases, encompasses data types for vague points, vague lines, and vague regions as well as for  ... 
doi:10.1201/9781420069273.sec1 fatcat:edqil3r4m5cbtgolfjvrlabudy

Spatial vagueness and imprecision in databases

Alejandro Pauly, Markus Schneider
2008 Proceedings of the 2008 ACM symposium on Applied computing - SAC '08  
The analysis in this paper is centered around the definition of our Vague Spatial Algebra (VASA) which exemplifies a complete approach to handle vagueness in spatial databases.  ...  The impossibility of current spatial database systems and GIS to handle spatial vagueness and imprecision has been recognized as an important problem in the spatial database domain.  ...  This results in an expected membership which is based on the defined probability function. VAGUE SPATIAL ALGEBRA In this section, we describe our concept of a Vague Spatial Algebra (VASA).  ... 
doi:10.1145/1363686.1363888 dblp:conf/sac/PaulyS08 fatcat:c5vokslsn5czfettygng4nisyq

Identifying topological predicates for vague spatial objects

Alejandro Pauly, Markus Schneider
2005 Proceedings of the 2005 ACM symposium on Applied computing - SAC '05  
Based on recent work on vague spatial data types, which are part of a formal data model called VASA (Vague Spatial Algebra) and which leverage exact models of crisp spatial data types, this paper introduces  ...  GIS and spatial database systems are currently unable to handle this kind of data.  ...  These vague topological predicates are part of a formal data model called VASA (Vague Spatial Algebra) and are based on recent work on so-called vague spatial data types [5] introducing vague points,  ... 
doi:10.1145/1066677.1066815 dblp:conf/sac/PaulyS05 fatcat:scpjg4454rde5ograxylxvu33a

Spatial Plateau Algebra for implementing fuzzy spatial objects in databases and GIS: Spatial plateau data types and operations

Markus Schneider
2014 Applied Soft Computing  
a Spatial Plateau Algebra that provides spatial plateau data types as an implementation of fuzzy spatial data types.  ...  data types in a database schema as well as the incorporation of fuzzy spatial operations into a database query language.  ...  In our own approach, called Vague Spatial Algebra (VASA) [38] , these parts are called kernel parts, exterior parts, and conjecture parts respectively.  ... 
doi:10.1016/j.asoc.2013.11.021 fatcat:ja34avib6rdv3mmmgjlsxgr4he

Topological Predicates Between Vague Spatial Objects [chapter]

Alejandro Pauly, Markus Schneider
2005 Lecture Notes in Computer Science  
This definition forms part of a formal data model referred to as VASA (Vague Spatial Algebra), in which the data types vague regions, vague lines, and vague points are defined in terms of existing definition  ...  Topological predicates are an important element of database systems that allow manipulation of spatial data.  ...  Spatial vagueness or indeterminacy is an inherent property of many objects that are handled in the spatial database context.  ... 
doi:10.1007/11535331_24 fatcat:dfosv3m72ffnnouswou25ehm2u

Plateau Regions: An Implementation Concept for Fuzzy Regions in Spatial Databases and GIS [chapter]

Virupaksha Kanjilal, Hechen Liu, Markus Schneider
2010 Lecture Notes in Computer Science  
In previous work, we have proposed an abstract data model of fuzzy spatial data types for fuzzy points, fuzzy lines, and fuzzy regions to represent the indeterminacy of spatial data.  ...  Many geographical applications need to model spatial phenomena with vague or indeterminate boundaries and interiors.  ...  The approaches in [3, 4] and our own approach, the Vague Spatial Algebra (VASA) [6] , leverage a three-valued logic with the truth values true, false, and maybe.  ... 
doi:10.1007/978-3-642-14049-5_64 fatcat:nq6b7b3akrdjhovm6v7nyjjgme

Vague Spatial Data Types, Set Operations, and Predicates [chapter]

Alejandro Pauly, Markus Schneider
2004 Lecture Notes in Computer Science  
These data types cover and extend previous approaches and are part of a data model called VASA (Vague Spatial Algebra).  ...  To support such data and applications, we introduce vague spatial data types for vague points, vague lines, and vague regions.  ...  These types are part of a data model called VASA (Vague Spatial Algebra).  ... 
doi:10.1007/978-3-540-30204-9_26 fatcat:mynb43bwtrhtjnirodtb6qr3pm

Visualization Tool [chapter]

2017 Encyclopedia of GIS  
The design goal for dealing with spatial vagueness in VASA is to base the definition of vague spatial data types and their operations on already existing definitions of exact spatial objects.  ...  VASA provides a data model appropriate for dealing with uncertainty of spatial data.  ...  data structures for efficient OSR query processing.  ... 
doi:10.1007/978-3-319-17885-1_101469 fatcat:rnvtcucz6vfulmc6voflfymen4

Spatial Representation of Coastal Risk: A Fuzzy Approach to Deal with Uncertainty

Amaneh Jadidi, Mir Mostafavi, Yvan Bédard, Kyarash Shahriari
2014 ISPRS International Journal of Geo-Information  
Spatial information for coastal risk assessment is inherently uncertain. This uncertainty may be due to different spatial and temporal components of geospatial data and to their semantics.  ...  Indeed, coastal risk is inherently a dynamic, complex, scale-dependent, and vague, phenomenon in concept.  ...  Shahriari helped for designing and implementing the proposed algorithm based on his expertise in fuzzy logic.  ... 
doi:10.3390/ijgi3031077 fatcat:zhtcsqdl65aplejmwfeuqprpyi

Soft Computing Techniques in Spatial Databases [chapter]

Markus Schneider
Soft Computing Applications for Database Technologies  
The section "VASA: An Algebra for Vague Spatial Data in Databases" presents the Vague Spatial Algebra, and the section "FUSA: An Algebra for Fuzzy Spatial Data in Databases" introduces the Fuzzy Spatial  ...  We give an overview of two type systems or algebras that can be integrated into database systems and utilized for the modeling and handling of spatial vagueness.  ...  VASA: AN ALGEBRA FOR VAGUE SPATIAL DATA IN DATABASES VASA comprises a set of vague spatial data types designed as abstract data types and equipped with a set of operations between these types.  ... 
doi:10.4018/978-1-60566-814-7.ch004 fatcat:gxngt7owx5dhjpqmhyvnmtpbi4

Prebiotic network evolution: six key parameters

Philippe Nghe, Wim Hordijk, Stuart A. Kauffman, Sara I. Walker, Francis J. Schmidt, Harry Kemble, Jessica A. M. Yeates, Niles Lehman
2015 Molecular Biosystems  
Acknowledgements SIW thanks the Templeton World Charity Foundation for funding support (opinions expressed in this publication are those of the authors and do not necessarily reflect the views of Templeton  ...  NL would like to acknowledge NASA Exobiology and Evolutionary Biology NNX14-AK21G for funding. Page 21 of 36 Molecular BioSystems  ...  Vasas et al. concluded that compartmentalization was an absolute requirement for evolvability.  ... 
doi:10.1039/c5mb00593k pmid:26490759 fatcat:r342d2o26zc6zg2jifbfovoidy

Download Complete Issue: 46 (42MB)

Complete Issue
2003 Cartographic Perspectives  
Chapter 11, "Storing Geographic Data," provides an historic overview of current approaches to representing digital geographic data in computers.  ...  The formal cleanness of current database design is contrasted with the relative ad hocery of the various vector and tessellation data models employed in GIScience.  ...  Handling the inexactness inherent in spatial-temporal databases is also required.  ... 
doi:10.14714/cp46.479 fatcat:k3rj76qolfe4zaqgmtqvgehqnm

Society for Development Biology 64th Annual Meeting

2005 Developmental Biology  
In addition, we show that an intact actin cytoskeleton is essential for this transcriptional repression.  ...  during Arabidopsis development; improved methods for computational identification of microRNA regulatory targets in animals, which indicate that more than a third of the human genes are conserved microRNA  ...  The same software can also be used to prepare private databases for in-lab data management or to prepare electronic submissions to EMAGE.  ... 
doi:10.1016/j.ydbio.2005.04.040 fatcat:jj63lzrujnfx7pt3uxl57spp4i

Southern California Academy of Sciences 2007 AnnualMeeting Abstracts

2007 Bulletin Southern California Academy of Sciences  
More data are needed to improve understanding of spatial and temporal variation in d 13 C and d 15 N signatures of seaweeds in southern California waters.  ...  A global database of kelp canopy distribution was produced from NASA GeoCover images for the years 2000 and 1990.  ...  As confirmed by the previous year's study, mule fat is a relatively plausible candidate for phytoremediation, though not necessarily better suited for cadmium as an effluent.  ... 
doi:10.3160/0038-3872(2007)106[87:scaosa]2.0.co;2 fatcat:arjsvb67ebcyphxi6inwpjve4y
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