A neural network approach using multi-scale textural metrics from very high-resolution panchromatic imagery for urban land-use classification

a r t i c l e i n f o Keywords: Extended pruning Multi-scale textural analysis Neural networks QuickBird Urban land-use Very high-resolution panchromatic data WorldView-1 The successful launch of panchromatic WorldView-1 and the planned launch of WorldView-2 will make a major contribution towards the advancement of the commercial remote sensing industry by providing improved capabilities, more frequent revisits and greater imaging flexibility with respect to the precursor QuickBird satellite. Remote sensing data from panchromatic systems have a potential for more detailed and accurate mapping of the urban environment with details of sub-meter ground resolution, but at the same time, they present additional complexities for information mining. In this study, very high-resolution panchromatic images from QuickBird and WorldView-1 have been used to accurately classify the land-use of four different urban environments: Las Vegas (U. The proposed method is based on the analysis of first-and second-order multi-scale textural features extracted from panchromatic data. For this purpose, textural parameters have been systematically investigated by computing the features over five different window sizes, three different directions and two different cell shifts for a total of 191 input features. Neural Network Pruning and saliency measurements made it possible to determine the most important textural features for sub-metric spatial resolution imagery of urban scenes. The results show that with a multi-scale approach it is possible to discriminate different asphalt surfaces, such as roads, highways and parking lots due to the different textural information content. This approach also makes it possible to differentiate building architectures, sizes and heights, such as residential houses, apartment blocks and towers with classification accuracies above 0.90 in terms of Kappa coefficient computed over more than a million independent validation pixels. Human activity truly dominates the Earth's ecosystems with structural modifications. Rapid population growth over recent decades and the concentration of this population in and around urban areas have significantly impacted the environment (Pacifici et al., 2007). Although urban areas represent a small fraction of the land surface, they affect large areas due to the magnitude of the associated energy, food, water and raw material demands. Urban areas are undergoing dynamic changes and, as a consequence, are facing new spatial and organizational challenges as they seek to manage local urban development within a global community. Sub-urbanization refers to a highly dynamic process where rural areas, both close to, but also distant from, city centers become enveloped by, or transformed into, extended …