In Spatial Data Infrastructures (SDIs) one of the layers that require particular attention in the integration process is the one describing the transport network. Different models can be adopted to represent and manage transport networks data, however, in most cases we have to handle properties that change their value along the road paths, for instance the road width or the number of lanes. This kind of data, usually called "segmented properties" can be represented in different ways, although at conceptual level they can be described as a function from the geometry to a specific domain ofvalues. In this paper we define a conceptual data model for representing "segmented properties" and map it into two implementation approaches: the structural implementation, with explicit geometry representation for each homogeneous segment, and the dynamic implementation, with the implicit representation ofthe segments by means of a measure (abscissa) on the route path. Then, we propose a method for transferring data from one implementation to the other one and to manage the problems arising from the integration ofnetworks with different geometry and different implementations of segmented properties. Finally, we illustrate the application of the proposed approach to a practical case involving data of the Lombardy Region (Italy).

Transferring Segmented Properties in the Conflation of Transportation Networks

MARCA, JODY;NEGRI, MAURO;PELAGATTI, GIUSEPPE;VISENTINI, PAOLO
2009-01-01

Abstract

In Spatial Data Infrastructures (SDIs) one of the layers that require particular attention in the integration process is the one describing the transport network. Different models can be adopted to represent and manage transport networks data, however, in most cases we have to handle properties that change their value along the road paths, for instance the road width or the number of lanes. This kind of data, usually called "segmented properties" can be represented in different ways, although at conceptual level they can be described as a function from the geometry to a specific domain ofvalues. In this paper we define a conceptual data model for representing "segmented properties" and map it into two implementation approaches: the structural implementation, with explicit geometry representation for each homogeneous segment, and the dynamic implementation, with the implicit representation ofthe segments by means of a measure (abscissa) on the route path. Then, we propose a method for transferring data from one implementation to the other one and to manage the problems arising from the integration ofnetworks with different geometry and different implementations of segmented properties. Finally, we illustrate the application of the proposed approach to a practical case involving data of the Lombardy Region (Italy).
2009
Advances in GIScience
9783642003172
INF
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/566857
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