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A segmentation and hierarchical classification approach applied to QuickBird multispectral satellite data was implemented, with the goal of delineating residential land use polygons and identifying low and high socio-economic status of neighbourhoods within Accra, Ghana. Two types of object-based classification strategies were tested, one based on spatial(More)
Context. The full three–year Wilkinson Microwave Anisotropy Probe results (hereafter WMAP3) reinforce the absence of large– angle correlations at scales greater than 60 •. The Poincaré dodecahedral space model, which may naturally explain such features, thus remains a plausible cosmological model, despite recent controversy about whether matched circle(More)
Context. The full three–year WMAP results (WMAP3) reinforce the absence of large–angle correlations at scales greater than 60 •. The Poincaré dodecahedral space model, which may naturally explain such features, thus remains a plausible cosmological model, despite recent controversy about whether matched circle searches would or would not push the topology(More)
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