Abstract
The ‘divide tree’ or ‘tree of interruption’ is a network of boundaries that control a CSNB map. It grows from trunk lines of topographic extremes (ridges or valleys) identifiable on a shaded relief or topography map as strings of nearest neighbor summits (maxima) or pits (minima). For irregular objects, these can be thought of as maximum angular inflexions of planar orientation relative to the center of mass. Generally, the tree grows in either top down (from maxima) or bottom up (from minima), starting with the most recognizable and extreme cluster of maxima or minima. However, if the intent is to consider a certain class of features, such as plate boundaries, only maxima or minima associated with these boundaries should be used. The next step involves flattening: the transformation of the generated tree (and its surrounding area) from the spherical to the planar surface. See the example in Fig. 2.1.
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Clark, P.E., Clark, C. (2013). Constant-Scale Natural Boundary Mapping Technique. In: Constant-Scale Natural Boundary Mapping to Reveal Global and Cosmic Processes. SpringerBriefs in Astronomy. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-7762-4_2
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