Performance of a New Enhanced Topological Decision-Rule Map-Matching Algorithm for Transportation Applications

Indexación: Web of Science; ScieloMap-matching problems arise in numerous transportation-related applications when spatial data is collected using inaccurate GPS technology and integrated with a flawed digital roadway map in a GIS environment. This paper presents a new enhanced post-processing topological decision-rule map-matching algorithm in order to address relevant special cases that occur in the spatial mismatch resolution. The proposed map-matching algorithm includes simple algorithmic improvements: dynamic buffer that varies its size to snap GPS data points to at least one roadway centerline; a comparison between vehicle heading measurements and associated roadway centerline direction; and a new design of the sequence of steps in the algorithm architecture. The original and new versions of the algorithm were tested on different spatial data qualities collected in Canada and United States. Although both versions satisfactorily resolve complex spatial ambiguities, the comparative and statistical analysis indicates that the new algorithm with the simple algorithmic improvements outperformed the original version of the map-matching algorithm.El problema de la ambigüedad espacial ocurre en varias aplicaciones relacionadas con transporte, específicamente cuando existe inexactitud en los datos espaciales capturados con tecnología GPS o cuando son integrados con un mapa digital que posee errores en un ambiente SIG. Este artículo presenta un algoritmo nuevo y mejorado basado en reglas de decisión que es capaz de resolver casos especiales relevantes en modo post-proceso. El algoritmo propuesto incluye las siguientes mejoras algorítmicas: un área de búsqueda dinámica que varía su tamaño para asociar puntos GPS a al menos un eje de calzada, una comparación entre el rumbo del vehículo y la dirección del eje de calzada asignada, y un nuevo diseño de la secuencia de pasos del algoritmo. Tanto el algoritmo original como el propuesto fueron examinados con datos espaciales de diferentes calidades capturados en Canadá y Estados Unidos. Aunque ambas versiones resuelven satisfactoriamente el problema de ambigüedad espacial, el análisis comparativo y estadístico indica que la nueva versión del algoritmo con las mejoras algorítmicas entrega resultados superiores a la versión original del algoritmo.http://ref.scielo.org/9mt55

The application of GIS to analyse occupier chains and property market filtering

With funding from the RICS Education Trust, Paul Greenhalgh and Helen King of Northumbria University, UK sought to investigate whether using Geographic Information System (GIS) can enhance the representation and analysis of property occupier chaining data – the method used to analyse the chain of moves that take place when firms occupy new premises. The way that they tested this was by transferring a dataset of office and industrial occupier chains in Tyne and Wear that had been collected by Paul Greehalgh for his PhD study into a GIS to illustrate, measure and analyse the chaining data more effectively than had previously been possible. What they were able to show was that, although the process is time-consuming, it is a relatively straightforward and logical process to translate property occupier chaining data into a GIS. The resultant GIS representation was able to replicate and verify findings of the original research. For example, it confirmed the accuracy of the original calculation of the distances that occupiers move, but it also revealed that the average distance moved diminished the further that they occur along a chain. The team then used rateable value and VAT registration datasets to interpret the origin of occupiers of new office and industrial developments, and the location of vacant chain end property. Of the two, the strongest correlation was with new VAT registrations within a three year period. New VAT registrations are associated with levels of economic activity and enterprise which would generate new businesses or start-ups that would typically take up small office and industrial units, thus absorbing vacant accommodation and contributing to property market filtering. Although the work used the Tyne and Wear region as a practical example, the key objective of the work was to test the applicability and robustness of the approach. As such, the key findings from the work relate as much to the process involved as to any specific insights into the Tyne and Wear region: • The application of GIS to property occupier chaining data was successfully demonstrated and was able, not only to verify the findings of the original research, but was able to extend the breadth and depth of analysis • The GIS was used to produce maps of the Tyne and Wear conurbation, displaying occupier chaining data, to enable further interpretation and analysis • By exploiting existing datasets it was possible to characterise the locations where occupiers relocate from and where property voids persist; this enhances our understanding of the impact of occupier displacement on the dynamics of commercial property markets • a multi-criteria analysis Business Activity Score (BAS) was developed with which to measure the relative performance of Middle Super Output Areas within the conurbation • The property chaining GIS may be used, not only to evaluate previous property market interventions, but also to inform the development of spatial strategies that shape new ones. The detailed and comprehensive investigation of occupier chains, generated by occupiers relocating to new commercial and industrial developments, makes an important contribution to our understanding of the spatial impact of development on local property markets, in terms of the displacement of property occupiers, the operation of property market filtering and the side-effects of public sector intervention in land and property markets

The Need and Requirements to a Strategy Ontology

The importance of strategy and strategy construct is not a new phenomenon. However as strategy work becomes less tangible, concerns with understanding, describing, and managing strategies develops into an increasingly complex subject. Current strategy concepts are dispersed and lack integration. Moreover, the enablement of modelling practices around strategy concepts considering the entire strategy lifecycle are also missing. Consequently, this paper focuses on issues with strategy in theory and practice, why a strategy ontology is needed and how this can be developed

Modeling urban evolution by identifying spatiotemporal patterns and applying methods of artificial intelligence.Case study: Athens, Greece.

While during the past decades, urban areas experience constant slow population growth, the spatial patterns they form, by means of their limits and borders, are rapidly changing in a complex way. Furthermore, urban areas continue to expand to the expense of "rural” intensifying urban sprawl. The main aim of this paper is the definition of the evolution of urban areas and more specifically, the specification of an urban model, which deals simultaneously with the modification of population and building use patterns. Classical theories define city geographic border, with the Aristotelian division of 0 or 1 and are called fiat geographic boundaries. But the edge of a city and the urbanization "degree" is something not easily distinguishable. Actually, the line that city ends and rural starts is vague. In this respect a synthetic spatio - temporal methodology is described which, through the adaptation of different computational methods aims to assist planners and decision makers to gain an insight in urban - rural transition. Fuzzy Logic and Neural Networks are recruited to provide a precise image of spatial entities, further exploited in a twofold way. First for analysis and interpretation of up - to - date urban evolution and second, for the formulation of a robust spatial simulation model, the theoretical background of which is that the spatial contiguity between members of the same or different groups is one of the key factors in their evolution. The paper finally presents the results of the model application in the prefecture of Attica in Greece, unveiling the role of the Athens Metropolitan Area to its current and future evolution, by illustrating maps of urban growth dynamics.urban growth; urban dynamics; neural networks; fuzzy logic; Greece; Athens

An agile business process and practice meta-model

Business Process Management (BPM) encompasses the discovery, modelling, monitoring, analysis and improvement of business processes. Limitations of traditional BPM approaches in addressing changes in business requirements have resulted in a number of agile BPM approaches that seek to accelerate the redesign of business process models. Meta-models are a key BPM feature that reduce the ambiguity of business process models. This paper describes a meta-model supporting the agile version of the Business Process and Practice Alignment Methodology (BPPAM) for business process improvement, which captures process information from actual work practices. The ability of the meta-model to achieve business process agility is discussed and compared with other agile meta-models, based on definitions of business process flexibility and agility found in the literature. (C) 2017 The Authors. Published by Elsevier B.V

Improving driver behaviour by design: a cognitive work analysis methodology

Within the European Community both the environmental and safety costs of road transport are unacceptably high. ‘Foot-LITE’ is a UK project which aims to encourage drivers to adopt ‘greener’ and safer driving practices, with real-time and retrospective feedback being given both in-vehicle and off-line. This paper describes the early concept development of Foot-LITE, for which a Cognitive Work Analysis (CWA) was conducted. In this paper, we present the results of the first phase of CWA – the Work Domain Analysis, as well as some concept interface designs based on the WDA to illustrate its application. In summary, the CWA establishes a common framework for the project, and will ultimately contribute to the design of the in-vehicle interfac