In November 2001 the Ordnance Survey, Britain’s National Mapping Agency, launched the first release of OS MasterMap, the definitive digital map database for Great Britain. The initial data within OS MasterMap consisted of topographic points, lines and polygons, stored as 2-dimensional features in an object-oriented database. This paper outlines the structure of OS MasterMap; the current height ...

(b) (c) (d) (e) (f) (g) (h) Figure 6. Edge, texture, and shape features: (a) edges extracted from image 5a; (b) edges extracted from image 5b; (c) simple texture measure applied to image 5b; (d) thresholded texture measure yields a blob corresponding to the ordnance ; (e) left image of a stereo pair of the totally exposed ordnance; (f) range image from the stereo pair; (g) elevation map from th...

ENSCO, Inc. is investigating a novel approach to data fusion of magnetic and ground-penetrating radar (GPR) data to characterize previously detected buried targets. The method exploits a single model of the subsurface to predict both magnetic and GPR data observations. By determining the best single model that constrains both data sets, the optimum identification is computed. Using an a priori ...

The attention given the natural geologic background of a site and its influence on geophysical sensors has grown considerably over the past several years, primarily because of the governmentsupported unexploded ordnance (UXO) technology demonstrations and government mandated UXO cleanup activities. Explosive and ordnance detection (EOD) teams have encountered difficulties at sites thought to be...

Current developments within the information technology industry are creating new opportunities for traditional information suppliers such as Ordnance Survey. In particular the ability to electronically trade information creates opportunities to increase the use of Ordnance Survey’s topographic information in ways that can be go beyond the delivery of such data in the form of a map. The future d...

OBJECTIVE To estimate post-traumatic stress disorder (PTSD) symptoms in those injured and not injured by landmines or unexploded ordnance (UXO) in rural Lao People's Democratic Republic and to determine whether the perception of social support was associated with PTSD symptom severity. METHODS A community survey was conducted among 190 people injured by landmines or UXO and 380 age-, sex- and...