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DOI: 10.2298/CSIS120302017F Constraint Relaxation of the Polygon-Polyline Topological Relation for Geographic Pictorial Query Languages
"... Abstract. This work addresses the problem of relaxing spatial constraints for pictorial queries having null answers in geographical databases. It fo-cuses on the polygon-polyline topological relationship and proposes a computational model which is based on the notions of Operator Concep-tual Neighbo ..."
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Abstract. This work addresses the problem of relaxing spatial constraints for pictorial queries having null answers in geographical databases. It fo-cuses on the polygon-polyline topological relationship and proposes a computational model which is based on the notions of Operator Concep
The Management of Spatial and Temporal Constraints in GIS using Pictorial Interaction on the Web
"... Abstract. This paper proposes and discusses an eXtended Pictorial Query Language (XPQL) for geographic data, and its possible use on the Web. This query language is mapped in Geographic Markup Language (GML 3.0), which is used for transport to the Web and storage of geographic information, including ..."
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Abstract. This paper proposes and discusses an eXtended Pictorial Query Language (XPQL) for geographic data, and its possible use on the Web. This query language is mapped in Geographic Markup Language (GML 3.0), which is used for transport to the Web and storage of geographic information
Querying GIS with Animated Spatial Sketches
- In 1997 IEEE Symposium on Visual Languages
, 1997
"... We present the design of the visual query system VISCO that offers a sketch-based query language for defining approximate spatial constellations of objects. VISCO smoothly integrates geometrical and topological querying with deductive spatial reasoning. It is based on a strong physical metaphor visu ..."
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Cited by 16 (6 self)
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visualizing semantics of query elements. Approximate queries rely on combined topological and geometrical constraints enhanced with relaxations and "don't cares" that are visualized through live animations. Keywords--- visual query systems, visual parsing, deductive GIS, constraints. 1
Spatial-Query-by-Sketch
- In Proceedings of IEEE Symposium on Visual Languages, VL’96, Boulder
, 1996
"... Today's methods for interacting with geographic information systems (GISs) and geographic databases are primarily aspatial, as they require users to deal with geographic data primarily through alphanumeric command languages. Spatial querying by typing a command in some spatial query language or ..."
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Cited by 4 (1 self)
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Today's methods for interacting with geographic information systems (GISs) and geographic databases are primarily aspatial, as they require users to deal with geographic data primarily through alphanumeric command languages. Spatial querying by typing a command in some spatial query language
A Filter Flow Visual Querying Language and Interface for Spatial Databases
, 2003
"... In this paper a visual approach to querying in spatial databases is presented.A ®lter ¯ow methodology is used to consistently express different types of queries in these systems.Filters are used to represent operations on the database and pictorial icons are used throughout the language for ®lters, ..."
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Cited by 2 (0 self)
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, operators and spatial relations.Different granularities of the relations are presented in a hierarchical fashion for spatial constraints.The language framework and functions are described and examples are used to demonstrate its capabilities in representing different levels of queries, including spatial
New Techniques for Geographic Routing
, 2006
"... As wireless sensor networks continue to grow in size, we are faced with the prospect of emerging wireless networks with hundreds or thousands of nodes. Geographic routing algorithms are a promising alternative to tradition ad hoc routing algorithms in this new domain for point-to-point routing, but ..."
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As wireless sensor networks continue to grow in size, we are faced with the prospect of emerging wireless networks with hundreds or thousands of nodes. Geographic routing algorithms are a promising alternative to tradition ad hoc routing algorithms in this new domain for point-to-point routing
APPROXIMATE GEOMETRIC REASONING WITH EXTENDED GEOGRAPHIC OBJECTS
"... The article presents a conceptual framework for formal geometric reasoning with extended objects in the context of vernacular geography. Vernacular geography is concerned with place names and their relations as they are used in people's everyday vernacular language. Commonly used place names in ..."
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if they were points”: Expressions like “Prague lies half-way between Vienna and Berlin ” or “The apartment is located quite between a train station, a tram stop, and a bus stop” involve not only topological relations, but also approximate geometric constructions that use extended geographic entities
Secure Geographic Routing in Wireless Sensor Networks
, 2013
"... the non-exclusive right to publish the Work electronically and in a non-commercial purpose make it accessible on the Internet. The Author warrants that he/she is the author to the Work, and warrants that the Work does not contain text, pictures or other material that violates copyright law. The Auth ..."
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the non-exclusive right to publish the Work electronically and in a non-commercial purpose make it accessible on the Internet. The Author warrants that he/she is the author to the Work, and warrants that the Work does not contain text, pictures or other material that violates copyright law. The Author shall, when transferring the rights of the Work to a third party (for example a publisher or a company); acknowledge the third party about this agreement. If the Author has signed a copyright agreement with a third party regarding the Work, the Author warrants hereby that he/she has obtained any necessary permission from this third party to let Chalmers University of Technology and University of Gothenburg store the Work electronically and make it accessible on the Internet.
Chapter 12 Rough Sets and Rough Logic: A KDD Perspective
"... Abstract Basic ideas of rough set theory were proposed by Zdzis law Pawlak [85, 86] in the early 1980’s. In the ensuing years, we have witnessed a systematic, world–wide growth of interest in rough sets and their applications. The main goal of rough set analysis is induction of approximations of con ..."
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of con-cepts. This main goal is motivated by the basic fact, constituting also the main problem of KDD, that languages we may choose for knowledge description are incomplete. A fortiori, we have to describe concepts of interest (features, proper-ties, relations etc.) not completely but by means
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