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Shoreline extraction is fundamental and inevitable for several studies. Ascertaining the precise spatial location of the shoreline is crucial. Recently, the need for using remote sensing data to accomplish the complex task of automatic extraction of features, such as shoreline, has considerably increased. Automated feature extraction can drastically minimize the time and cost of data acquisition and database updating. Effective and fast approaches are essential to monitor coastline retreat and update shoreline maps. Here, we present a flexible mathematical morphology-driven approach for shoreline extraction algorithm from satellite imageries. The salient features of this work are the preservation of actual size and shape of the shorelines, run-time structuring element definition, semi-automation, faster processing, and single band adaptability. The proposed approach is tested with various sensor-driven images with low to high resolutions. Accuracy of the developed methodology has been assessed with manually prepared ground truths of the study area and compared with an existing shoreline classification approach. The proposed approach is found successful in shoreline extraction from the wide variety of satellite images based on the results drawn from visual and quantitative assessments.

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Road networks are one of the major features that influence urban planning and development. Thus, road maps of urban areas have to be updated periodically. With advances in remote sensing technology and platforms more and more high quality and fine spatial resolution satellite images are available. Manual method of feature extraction from remote sensing imagery is a tedious and time-consuming process. Automated feature and road network extraction can drastically minimize the time and cost of data acquisition and database update. Thus, automated and replicable techniques play vital role in updating road network to evaluate the spatial and temporal evolution of urban sprawl especially for vastly growing urban areas. This research work presents a mathematical morphology (MM) based approach which is effective and useful for the extraction of road networks from satellite and aerial imageries with better accuracy and minimal turnaround time. Maintenance of actual size and shape of the road networks, runtime control over structuring elements, automation, faster processing and single band adaptability are features of this work. Accuracy of developed methodology has been assessed with ground truths of the area of interest.

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