Satellite imagery has become an efficient and time effective tool that
may aid in the development of regional terrestrial and aquatic resource management
schemes. A methodology utilizing National Oceanic and Atmospheric
Administration (NOAA) Advanced Very High Resolution Radiometer (AVHRR)
imagery, 1.1 kilometer spatial resolution at nadir, was developed for delineating...
Moire patterns have been identified by printers as
undesirable screen patterns caused by incorrect angling of
overprinted halftones. These patterns are being examined by
cartographers as a possible alternative to traditional methods
of producing patterned areas on maps. Map design guidelines
are needed before the use of moires can become...
A Digital Earth is a visualization tool that uses the latest technologies to embed vast
quantities of geographic data into easily understood information. By creating three-dimensional
landscape visualizations that look as photorealistic as current technology
allows, it becomes possible to see, explore, and spatially understand parts of the Earth as...
A psychophysical bisectioning experiment was performed
to evaluate equal steps within tint progressions on a high
resolution graphics terminal. In the bisectioning
experiment each respondent partitioned a tint progression
by interactively defining colors that were perceptually
equidistant between two previously defined colors. Twenty
test subjects performed the test on the...
Animated cartography is still a new field. It has been experimented with for years, but it
has not gained general usage except partially in use by the news media. Nevertheless, certain
subjects cry out for displaying the patterns of movement over time, such as historical patterns of
migration and settlement,...
The major considerations for acquiring and using a
geographic information system (G..I.S.) for regional or national
geographical research and analysis are examined in this paper.
After defining what a G.I.S. is, some of the more practical and
useful functions of a G.I.S. in day-to--day geographical work are
outlined. Finally, the...
This paper discusses the methods used to create a maintainable
tracking system for used by the City of Corvallis' Plaiming Division for the
purpose of historic preservation. The system includes a Microsoft Access2000
database and an ArcView GIS component. In addition to this, there is a web site
This paper explores the confusion that exists between general definitions of what constitutes a GIS or CAD system. Then a comparison and contrast is made of microcomputer versions of GIS and CAD programs using as examples two of the most popular, pcARC/INFO and Aut0CAD. The differences and similarities are discussed...
Many studies have looked at human settlements around individual volcanoes for
volcanic risk analyses, but few have done a comparative study to identify possible global
patterns. With the use of Landsat ETM+ data, this study identifies and compares urban
proximity to the Decade Volcanoes to identify volcanic settlement patterns. These...
Mitchell Marsh, a tidal salt marsh in the Salmon River Estuary, was diked in the
early 1960s. Restoration of the marsh, which began in late 1978, consisted of partial dike
removal. Several studies have been conducted in the marsh, addressing the status of the
developing salt marsh plant communities. Species...