Index Catalog // ScholarsArchive@OSU

Identification of irrigation practices using photographic and optical-mechanical scanning remote sensing techniques

Creator:: Naim, Shamim
Abstract:: Irrigation is essential for profitable agriculture in the western United States. It is the largest consumer of water and power in Oregon. Conflicting uses of water and power and their scarcity demands judicious planning for allocation of these resources. Creditable baseline data are not only needed for irrigated crop acreages,...
Resource Type:: Dissertation

Determination of geographic information system database characteristics : an application of the information integration theory

Creator:: Brooks, Kris
Abstract:: The development of a geographic information system (GIS) requires the development of large databases of spatially related information. Scale, resolution and the classification of thematic data can vary considerably in terms of the level of detail at which the data are compiled and converted to machine readable form. The level...
Resource Type:: Dissertation

The influence of map complexity on interpolation accuracy.pdf

Creator:: Young, Brian K.
Abstract:: In this paper "map complexity" refers to the inherent intricacy of a mapped geographic pattern. Map complexity and sample size are two variables shown to influence the accuracy of interpolated dasymetric maps. An automated experiment was designed to investigate the precise relationship among map complexity, sample size, and the accuracy...
Resource Type:: Masters Thesis

Equal contrast tint progressions for computer cartography

Creator:: Bernert, Joseph A.
Abstract:: 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...
Resource Type:: Masters Thesis

Color specification and cartography: a comparison of the Munsell Color System and the HLS system

Creator:: Yeaple, Anne
Abstract:: Progress in the development of color CRT's and color graphic hard-copy devices offers a new tool for the thematic mapper. From a cartographic perspective, the technology for displaying and producing color maps has advanced without concern for cartographic principles and conventions in the employment of color. Since it is necessary...
Resource Type:: Capstone Project

Expert systems in computer cartography

Creator:: Ulshoefer, Veit Stefan
Abstract:: The purpose of this paper is to describe the application of expert system concepts to cartographic problems. Expert systems, a subfield of artificial intelligence, are computer programs based on knowledge and symbolic reasoning. The basic principles of expert systems will be explained. Areas of cartography that are most suitable for...
Resource Type:: Capstone Project

Perception of Munshell chromas for computer-assisted map design

Creator:: Katz, Leslie E.
Abstract:: For many years, psychologists have studied the principles of psychophysics. Recently, cartographers have been considering psychophysical theory in color attribute analysis to aid in the design of maps. An experiment was conducted using the partitioning method by which the Munsell value scale was determined to find (R,G,B) coordinates giving equally...
Resource Type:: Capstone Project

From myth to reality: mapping the Northwest 1790 to 1850

Creator:: Mathewson, Sandy
Abstract:: The prevailing image of the Northwest at the beginning of the nineteenth century, as portrayed on maps published at the time, was based more on myth and wishful thinking than on geographic fact. During the next fifty years these myths were exploded as exploration of this previously unknown territory progressed,...
Resource Type:: Capstone Project

A comparison and contrast of pcARC/INFO vs. AutoCAD

Creator:: Smith, Pamela Ann
Abstract:: 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...
Resource Type:: Capstone Project

Interactive choropleth mapping using high resolution color graphics

Creator:: Spielman, Julie B.
Abstract:: A program, Color Choropleth Mapping System (CCMS), has been developed to provide high quality color choropleth maps at the Geography Department at Oregon State University. The program operates interactively and is menu-driven. When developing the software for mapping programs, programmers need to be aware of cartographic theory, as well as...
Resource Type:: Capstone Project

Geometric laws for moire patterns produced by cartographic tint screens

Creator:: Greenfield, Leslie Susan
Abstract:: 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...
Resource Type:: Capstone Project

Remote sensing methodology for bioenvironmental surveillance in the vicinity of the Boardman Coal-Fired Power Plant, Oregon

Creator:: Denkers, D. Scott
Abstract:: In 1979, the Geographic Applications Laboratory of the Department of Geography, Oregon State University, was retained by the Portland General Electric Company to form and supervise a program to monitor the bioenvironment in the vicinity of the Boardman Coal-Fired Power plant. This partially fulfills requirements of the Department of Energy...
Resource Type:: Capstone Project

Mapping the potential acidic deposition in southwestern California using ambient air concentrations of acid precursors

Creator:: Doherty, David D.
Abstract:: Attempts to map the distribution of acidic deposition have been inadequate, particularly in areas of seasonal or limited rainfall. Ambient air concentrations of acid precursors may be used to monitor and map the distribution of potential acidic deposition. A network of stations in California currently monitor these ambient air concentrations....
Resource Type:: Capstone Project

The use of remote sensing in an integrated approach for stress detection on the cultivated cranberry

Creator:: Thoma, Michael N.
Abstract:: Remote sensing is an attractive method for the detection and monitoring of crop stress. The feasibility of using remote sensing for the detection and monitoring of fungal diseases, insects, weeds, and non-infectious diseases affecting the cultivated cranberry (Vaccinium macrocarpon Ait.) is evaluated. A study on the fungal disease twig blight...
Resource Type:: Masters Thesis

Epsilon, generalization and probability in spatial data bases

Creator:: Honeycutt, Dale M.
Abstract:: Cartographic generalization results In locational Inaccuracies of the generalized feature. The cartographer expresses the amount of generalization and the locational inaccuracy of the feature through map design and choice of map scale. This information is often lost when the map is digitized. In the environment of geographic Information systems, the...
Resource Type:: Capstone Project

Geographic information systems : some considerations for use in geographic research and analysis

Creator:: Herstrom, Andrew A.
Abstract:: 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...
Resource Type:: Capstone Project

Computerized delineation of watersheds using digital elevation model data

Creator:: Flewelling, Douglas Mark
Abstract:: A method for delineating watersheds by computer using digital elevation model (OEM) data is presented. The five steps in this process are detailed and examples are shown. The algorithm was tested using a manually created OEM for a small area in Northern California. Three basins were delineated using the delineation...
Resource Type:: Masters Thesis

Relationships between grass canopy characteristics and Landsat Thematic Mapper bands

Creator:: Ripple, William J.
Abstract:: The relationships between spectral reflectance in the Landsat Thematic Mapper (TM) bands and grass canopy variables were evaluated using in situ remote sensing techniques. Reflectance data were collected from experimental plots of annual ryegrass (Lolium multiflorum) and tall fescue (Festuca arundinacea) using a Barnes Modular Multiband Radiometer (MMR). The canopy...
Resource Type:: Dissertation

ScholarsArchive@OSU

Identification of irrigation practices using photographic and optical-mechanical scanning remote sensing techniques

Determination of geographic information system database characteristics : an application of the information integration theory

The influence of map complexity on interpolation accuracy.pdf

Equal contrast tint progressions for computer cartography

Color specification and cartography: a comparison of the Munsell Color System and the HLS system

Expert systems in computer cartography

Perception of Munshell chromas for computer-assisted map design

From myth to reality: mapping the Northwest 1790 to 1850

A comparison and contrast of pcARC/INFO vs. AutoCAD

Interactive choropleth mapping using high resolution color graphics

Geometric laws for moire patterns produced by cartographic tint screens

Remote sensing methodology for bioenvironmental surveillance in the vicinity of the Boardman Coal-Fired Power Plant, Oregon

Mapping the potential acidic deposition in southwestern California using ambient air concentrations of acid precursors

The use of remote sensing in an integrated approach for stress detection on the cultivated cranberry

Epsilon, generalization and probability in spatial data bases

Geographic information systems : some considerations for use in geographic research and analysis

Computerized delineation of watersheds using digital elevation model data

Relationships between grass canopy characteristics and Landsat Thematic Mapper bands

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