For quickly populating GIS database, it is important to derive accurate and truly road information from imagery. In this paper, we describe the problem of urban road extraction from digital imagery using adaptive active contour models (Snakes). Our road extraction processing has three steps. First, we segment the image based on the dominant road directions. Second, we detect the road lines with...

Data from the urban renewal experience in Syracuse, New York are used to examine the impact of race on patterns of intra-urban migration. The results show that, overall, the migration patterns exhibited an exponential decay in frequency with increasing distance. Both blacks and whites display this pattern, but blacks tend to cluster more closely around the point of origin. Indirect evidence is ...

The project consists of a central body (Illumination simulation) formed by three main blocks, which is oriented to the design (CAD) of active (luminaries, luminaries’ distribution) or passive illumination systems and elements (windows, skylights). The results of the three blocks from this central body will be applied to environments, which will be generated in the Urban modelling block, and wil...

Recently, visualization of urban scenes attracts attention from the perspective of tourism and cultural city activation. Considering the popularity of the digital still cameras, a more impressive form of urban scenes, which allows the user to view the scenes from connected various points, is required. The still images can be connected in three dimensional space relatively. By compensating some ...

African Americans and Hispanics are disproportionately affected by the HIV/AIDS epidemic. Within the most heavily affected cities, a few neighborhoods account for a large share of new HIV infections. Addressing racial and economic disparities in HIV infection requires an implementation program and research agenda that assess the impact of HIV prevention interventions focused on increasing HIV t...

BACKGROUND Pedestrian incidents represent an increasing proportion of serious injuries resulting from motor vehicle collisions in Canada. However, few studies have examined the effect of pedestrian crossing location in urban areas on injury severity. The objective of this study was to investigate the relationship between pedestrian-motor vehicle collision injury severity and crossing location. ...

We present a method for interactive procedural generation of parcels within the urban modeling pipeline. Our approach performs a partitioning of the interior of city blocks using user-specified subdivision attributes and style parameters. Moreover, our method is both robust and persistent in the sense of being able to map individual parcels from before an edit operation to after an edit operati...

OBJECTIVES To estimate the magnitude of access block and its trend over time in New South Wales hospitals, using different definitions of access block, and to explore its association with clinical and non-clinical factors. DESIGN AND SETTING An epidemiological study using the Emergency Department Information System datasets (1 January 1999 to 31 December 2001) from a sample of 55 NSW hospital...