کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
507431 | 865122 | 2012 | 7 صفحه PDF | دانلود رایگان |
A new approach is developed to improve the automated identification and characterization of topographic highs having quasi-elliptical basal shapes. It is designed for the study of volcanic edifices in subaerial and submarine environments, but may be applied to identify any enclosed topography feature within a digital elevation model. The procedure utilizes the results of a standard closed-contouring approach, but then adjusts the elevation of the volcanic base by evaluating the shape of the edifice along a series of topographic profiles. The algorithm overcomes the principal limitations of a stand-alone closed-contouring approach and provides improved estimates of edifice size that are less sensitive to topographic gradients and the choice of contour search interval.
► We developed a new algorithm to locate volcanic edifices in gridded elevation datasets.
► The method improves on the popular closed-contour approach.
► Simple geometric criteria are used in a scale independent manner.
Journal: Computers & Geosciences - Volume 49, December 2012, Pages 308–314