Automated extraction of road network from medium-and high-resolution images

This paper presents an automatic methodology for road network extraction from medium-and high-resolution aerial images. It is based on two steps. In the first step, the road seeds (i.e., road segments) are extracted using a set of four road objects and another set of connection rules among road objects. Each road object is a local representation of an approximately straight road fragment and its construction is based on a combination of polygons describing all relevant image edges, according to some rules embodying road knowledge. Each road seed is composed by a sequence of connected road objects in which each sequence of this type can be geometrically structured as a chain of contiguous quadrilaterals. In the second step, two strategies for road completion are applied in order to generate the complete road network. The first strategy is based on two basic perceptual grouping rules, i.e., proximity and collinearity rules, which allow the sequential reconstruction of gaps between every pair of disconnected road segments. This strategy does not allow the reconstruction of road crossings, but it allows the extraction of road centerlines from the contiguous quadrilaterals representing connected road segments. The second strategy for road completion aims at reconstructing road crossings. Firstly, the road centerlines are used to find reference points for road crossings, which are their approximate positions. Then these points are used to extract polygons representing the contours of road crossings. This paper presents the proposed methodology and experimental results. © Pleiades Publishing, Inc. 2006.

Road maps towards an information society in Latin America and the Caribbean

Includes bibliography

Developing road safety in Latin America and the Caribbean: towards a vision of sNever again

Includes bibliography

Creative industries in the Caribbean: a new road for diversification and export growth

Includes bibliography

Ecological data on road killed Amphisbaena alba linnaeus, 1758 (Squamata, Amphisbaenidae) in southeast Brazil

Vehicles running over vertebrates has been an increasing challenge to the local conservation of some herpetofauna. The Amphisbaenidae are fossorial reptiles which are poorly known ecologically. Biological and natural history data were obtained from three specimens of Amphisbaenia alba that were found dead along 8320 km survey of highways. The rarity of road kill and the importance of the species conservation are discussed.

Coordinación del transporte vial con los demas medios de transporte internacional en Sudamérica = Co-ordination of road transport with other international transport media in South America

Incluye Bibliografía

The Mexican road to change

Discurso pronunciado por el Secretario de Programación y Presupuesto de México el día 10 de mayo.

Concessions and road and rail transport optimization

Includes bibliography

Labour mobility in Argentina since the mid-1990s: the hard road back to formal employment

Includes bibliography

Road map towards the implementation of the United Nations Millennium Declaration: report of the Secretary-General

Includes bibliography

Latin America and the Caribbean on the Road to Rio+20

Spanish version available at the Library

The road to a fiscal covenant: a critical look at the Dominican experience

Includes bibliography

The SIDS programme of action, agenda Twenty One: the road to Johannesburg, 2002

Includes bibliography

Roads: a new approach for road network management and conservation

Includes bibliography