Accession Number : ADP007164

Title :   Dynamic Visualization of Late Quaternary Pollen Data,

Corporate Author : BROWN UNIV PROVIDENCE RI DIV OF APPLIED MATHEMATICS

Personal Author(s) : Knoerr, Alan P. ; Webb, Thompson, III ; Colthurst, Thomas W.

Report Date : 1992

Pagination or Media Count : 4

Abstract : Pollen from trees and other plants is preserved annually in the sediments of bogs, ponds, and lakes, forming a record of contemporary vegetation. Geologists sampling pollen preserved over the past 20,000 years have created large databases whose variables include latitude, longitude, time, abundance, and pollen type. Traditional methods of visualizing these data include pollen diagrams (time series of plant taxa abundances), classification diagrams, and contour maps of pollen abundance. While these are valuable tools, modern computer graphics technologies offer new ways of visualizing continuous multidimensional structures. In this paper, we describe the development of an interactive computer graphics package, supported by IRIS-4D workstations, for visualization of higher-dimensional aspects of the pollen database covering eastern North America.

Descriptors :   *CLASSIFICATION, *COMPUTER GRAPHICS, *MAPS, *SWAMPS, *STATISTICS, COMPUTERS, CONTOURS, COVERINGS, DIAGRAMS, GRAPHICS, IRIS, LAKES, LATITUDE, LONGITUDE, NORTH AMERICA, PAPER, POLLEN, PONDS, RECORDS, SAMPLING, SEDIMENTS, STRUCTURES, TIME, TOOLS, TREES, VARIABLES, VEGETATION.

Subject Categories : Statistics and Probability

Distribution Statement : APPROVED FOR PUBLIC RELEASE