Now showing items 1-5 of 5
A GIS-Based Optical Viewshed Optimization Algorithm
(Virginia Tech, 2007-05-31)
Traditional viewshed analyses distinguish between those areas which can be seen from a given observation point and those which cannot be seen. Given a surface digital elevation model (DEM) and observer properties (location ...
Habitat preferences of the eastern fence lizard, Sceloporus undulatus, in southwestern Virginia
(Virginia Tech, 2007-05-04)
Habitat preference of the eastern fence lizard, Sceloporus undulatus, was investigated in southwestern Virginia. Habitat features were measured at 158 lizard-centered plots and at paired random plots. Landscape-level ...
A Dendrochronological Analysis of Vegetation Change and Climate History in Two Southern Appalachian Balds, Craggy Gardens and Big Bald, NC
(Virginia Tech, 2007-04-06)
In the southern Appalachians, unforested openings known as balds persist on or near mountain peaks. These high elevation openings support a variety of unusual biota and are considered globally rare as a result of their ...
Development and Evaluation of the Profile Synthesis Method for Approximate Floodplain Redelineation
(Virginia Tech, 2007-11-15)
In the United States, the floodplain maps used in the administration of the National Flood Insurance Program are created and maintained by the Federal Emergency Management Agency. Currently, a nationwide map modernization ...
A GIS-Based Landscape Scale Model for Native Bee Habitat
(Virginia Tech, 2007-09-11)
Through pollination, bees are responsible for the persistence of many biological systems on our planet. Bees have also been used for thousands of years in agriculture to improve crop quality and yield. Recently, there ...