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...
Slope-aspect is the compass direction of a slope at a particular location on a given
surface, and can provide a graphic tool for people who require an understanding of
the pattern of slope-aspect variation across a landscape. Slope-aspect maps can be
helpful for terrain analysis, watershed management, building site analysis,...
The American Proposed Standard for Digital
Cartographic Data presents the new national exchange format
which allows the transfer of spatial data among parties
that may use different computer hardware and different
operating system software.
A translator program for the conversion of the AutoCAD
DXf data structure to the Standard's output...
A site suitability analysis for reforestation of the endemic Hawaiian forest tree koa (Acacia koa var. hawaiiensis) was performed. The study will assist the Hawai'i Resource Conservation and Development's (RCD) Forestry Committee in their effort to develop a master land use plan for koa regeneration on the Island of Hawai'i....
With increased attention being focused on the remaining old-growth
forest resource in the Pacific Northwest a way to ecologically rate forest stands is
needed to assist the U.S. Forest Service in its management decisions. A Geographic
Information System (GIS) model was developed to rate old-growth stands in a 49,500
acre...
This study provides some guidelines using and comparing the
RGB (red, green, blue), HSV (hue, saturation, value), and HLS (hue,
lightness, saturation) color specification systems to help designers
of computer produced layer tinted maps to select appropriate and
effective colors from the immense palette provided by modern color
monitors. Map...
When the Spatial Data Transfer Standard is adopted as a Federal
Information Processing Standard, a Quality Report containing sections on lineage,
accuracy, logical consistency, and completeness will be required of agencies
producing digital cartographic data. This Quality Report diverges significantly from
the "U.S. National Map Accuracy Standards", in place for...
Historically the U.S. Forest Service has used uncorrected
aerial photographs to delineate proposed and past management
activities on the land base it manages. Transferring a boundary
from an image not planimetrically correct to a planimetrically
corrected image introduces errors. Positional accuracy of
boundaries affects the number of acres the Forest...
Efficient management of natural resources requires the ability to utilize and integrate information. The challenge is to fully utilize this information base with its various degrees of accessibility, ever increasing volume and dispersed nature. The manager must be familiar with media types used to store, manage and communicate this information....
Geographic Information Systems (GIS) is a burgeoning
field with its roots in geography. It is increasingly
being used by a large variety of disciplines, including
land use planning, as a decision support tool to help solve
complex spatial problems. At Oregon State University,
researchers have developed an analog model which...