Delineating Boundaries for Imprecise Regions

A framework for delineating biogeographical regions based on species distributions

Biodiversity, Macroecology and Conservation Biogeography Group, Faculty of Forest Sciences and Forest Ecology, University of Göttingen, Büsgenweg 2, 37077 Göttingen, Germany, Ecology, Behavior and Evolution Section, Division of Biological Sciences, University of California San Diego, 9500 Gilman Drive, MC 0116, La Jolla, CA 92093-0116, USA, Department of Ecology and Evolutionary Biology, Yale U...

Web-based delineation of imprecise regions

This paper describes several steps in the derivation of boundaries of imprecise regions using the Web as the information source. We discuss how to use the Web to obtain locations that are part of and locations that are not part of the region to be delineated, and then we propose methods to compute the region algorithmically. The methods introduced are evaluated to judge the potential of the app...

Identifying imprecise regions for geographic information retrieval using the web

Globally Optimal Regions and Boundaries

We propose a new form of energy functional for the segmentation of regions in images, and an efficient method for finding its global optima. The energy can have contributions from both the region and its boundary, thus combining the best features of regionand boundary-based approaches to segmentation. By transforming the region energy into a boundary energy, we can treat both contributions on a...

Delineating Europe's cultural regions: population structure and surname clustering.

Surnames (family names) show distinctive geographical patterning and in many disciplines remain an underutilized source of information about population origins, migration and identity. This paper investigates the geographical structure of surnames, using a unique individual level database assembled from registers and telephone directories from 16 European countries. We develop a novel combinati...