HR: 1340h
AN: H43E-1679    [Abstracts]
TI: Spatial Analysis of Drumlin Orientations
AU: * Gilstrap, C R
EM: Gilstrap.C@gmail.com
AF: Department of Mathematical Sciences, Montana State University - Bozeman, PO BOX 172400, Bozeman, MT 59717-2400, United States
AU: Greenwood, M C
EM: greenwood@math.montana.edu
AF: Department of Mathematical Sciences, Montana State University - Bozeman, PO BOX 172400, Bozeman, MT 59717-2400, United States
AU: Norton, K P
EM: k.norton@mineralogie.uni-hannover.de
AF: Institute for Mineralogy, University of Hannover, Callinstrasse 3, Hannover, 30167, Germany
AB: Patterns in the orientations of drumlins may hold insight into their formation, but have received limited attention in the literature. Conventional statistical methods can not be applied to orientation data, so techniques for circular statistics must be used. Specifically, we use geographically weighted techniques as in Brunsdon and Charlton (2006) to assess the spatial structure in the orientations of the Chautauqua drumlin field. The field is located in North Western Pennsylvania and Western New York State and contains 755 drumlins, mapped from a 10m DEM, in an area of approximately 2500 square kilometers (Norton and Lanier, 2007). We also consider regression trees for a circular response, as in Lund (2002), to build predictive models for the orientations using both the drumlin locations and other morphometric characteristics to explain the spatial variability of these subglacial landforms.
DE: 0726 Ice sheets
DE: 0758 Remote sensing
DE: 0798 Modeling
DE: 3252 Spatial analysis (0500)
DE: 9350 North America
SC: Hydrology [H]
MN: 2007 Fall Meeting