Equal value gray scales are frequently employed by cartographers to choose gray tone area
symbols. Several researchers have tried to quantify perceived gray tone as a function of percent area inked or
reflectance but results have varied. The influence of pattern and texture on gray tone perception is considered
a...
Ragay Gulf and Burias Pass are among the traditional fishing grounds of the
country being considered by the government for an integrated approach to fishery
management (Smith, et al., 1980; Samson, et al., 1977, World Bank, 1976). The
Department of Marine Fisheries, College of Fisheries, University of the Philippines in...
While many geographers believe that the regional
concept is central to geographic study, no definitive regional
scheme exists. The criteria considered in each regional study
will relate to a stated objective or study. Ecological
regionalization is a major contribution by geographers to
environmental studies. By examining spatial patterns of factors...
The Willamette River Greenway Program was created by an act of the Oregon Legislature in 1968 and modified by a second act in 1973.
The purpose of the program was to protect the natural environment of the river from approximately the foot of the Cascade Range near Eugene, north to...