Abstract An ultrasonic technique has been experimented for non destructive testing of building structures. The Through Transmission Technique has been applied, processing the wave incident on a grid of detecting probes after it has been transmitted through a trachite stone masonry with an inside cavity. Several parameters associated with acoustic waves propagating through the structure have bee...

The spatial distribution pattern of cultural resource generally manifests clustered qualification to some extent, and we can infer the vicissitudes of the correlative culture by analyzing the changing rule of the spatial distribution pattern of cultural resource. However, the majority of the concerned researches are still at the level of qualitative statistics and thematic map visualization of ...

André-Michel Guerry’s (1833) Essai sur la Statistique Morale de la France was one of the foundation studies of modern social science. Guerry assembled data on crimes, suicides, literacy and other “moral statistics,” and used tables and maps to analyze a variety of social issues in perhaps the first comprehensive study relating such variables. Indeed, the Essai may be considered the book that la...

The Egnatia highway, a modern closed motorway 670 kilometres long, is one of the largest road construction projects in Europe, running across Northern Greece. In order to record and analyze the spatial and environmental effects that inevitably the Egnatia highway has caused to its surroundings, the need for effective and efficient integration of land cover dynamic information is becoming more a...

Cluster detection for a set P of n points in geographic situations is usually dependent on land cover or another thematic map layer. This occurs for instance if the points of P can only occur in one land cover type. We extend the definition of clusters to regionrestricted clusters, and give efficient algorithms for exact computation and approximation. The algorithm determines all axis-parallel ...

Accurate characterization of the direction of land change is a neglected aspect of land dynamics. Knowledge on direction of historical land change can be useful information when understanding relative influence of different land-change drivers is of interest. In this study, we present a novel perspective on land-change analysis by focusing on directionality of change. To this end, we employed M...

A comparative analysis is presented for empirical topographic normalization of Landsat Thematic Mapper (TM) data in varied forest and topographic settings. The paired study included rugged areas of Glacier National Park, Montana, Linville Gorge Wilderness, North Carolina, and Green Mountains, Vermont, U.S.A. Empirical models of topographic bias achieved significant corrections in the Montana an...