Digital Commons Network^™

Mapping Deer Yard Habitats Using Landsat: A Practical Application, Kevin D. Doran

LARS Symposia

Mapping habitats suitable for deer yards using Landsat Multispectral Scanner (MSS) digital data has proven to be a valuable tool in New Hampshire. By knowing the requirements for deer yards in conjunction with the forest types of an area, considerable time and money can be saved by the game biologist locating deer yards. The procedure used is a relatively simple one. Landsat classification maps are generated for various towns using softwood, hardwood, mixed wood, open, and water categories. The maps are then used by the biologists to field check every softwood area on the classification map, softwood areas being important …

Computer Generated Maps From Digital Satellite Data: A Case Study In Florida, L. G. Arvanitis, R. M. Reich, R. Newburne

LARS Symposia

The availability of satellite data and the advantages offered by automatic machine-processing of such data have opened up new and exciting possibilities for developing ground cover maps. Two Landsat analyses techniques (an unsupervised clustering algorithm called Landsat Signature Development Program, and an interactive method based on the Multispectral Image Analyzer) are used to compare computer generated character maps to known earth surface features. Data samples are shown and applications are discussed. Reference is made to the value of the digital computer in natural and man-made features mapping and monitoring, and suggestions are given for further research.

What's Happening To The World's Forest Resources, James J. Talbot

LARS Symposia

This paper discusses the current information base available on global forest resources. The focus includes: the extent of forest cover based on the most widely-used data base; the accuracy of this data base; other estimates of forest resources; the special case of tropical forests; the extent to which deforestation in the tropics is factored into the global forest resource estimates; and emerging patterns of demand and utilization of forests. The paper concludes with a brief discussion of what information is needed to obtain a more comprehensive assessment of forest resource status.

Application Of Remote Sensing And Geographic Information System Techniques To Evaluate Agricultural Production Potential In Developing Countries, Ger Schultink, Weldon Lodwick, J. B. Johnson

LARS Symposia

The Comprehensive Resource Inventory and Evaluation System (CRIES) project uses a multidisciplinary approach to (1) assist developing countries to analyze their agricultural production potential, and (2) enhance their capabilities to conduct such analyses for policy formulation and evaluation. The project staff has collaborated within their respective disciplines with counterparts in the Dominican Republic, Costa Rica, Nicaragua, Syria, and Honduras to enhance each country's capacity to analyze agricultural production possibilities. The technical assistance provided has been in one of four functional areas. These are: (1) data acquisition; (2) information management and analyses; (3) analyses of policy alternatives; and (4) technology transfer …

A Development Of Interactive Image Processing Software System Tipe, Kiyonari Fukue, Haruhisa Shimoda, Toshibumi Sakata

LARS Symposia

Conventional monitors of image processing systems have not sufficient flexibility, expandability and easy-handing capability.

TIPE has been developed to overcome these problems. The monitor of TIPE consists of following three subsystems

(1) A scheduling system including a scheduler and menu files.

(2) A control parameter management system including a control parameter management module and control parameter files.

(3) A catalog system including a catalog management module, catalog files and a header management module.

Scheduling system is based upon menu files which are hierarchicaly organized. In the control parameter management system, control parameters are stored in a disc file called a …

Strategies For Information -- Directed Wetlands, Norman E. G. Roller

LARS Symposia

Protection and effective management of wetlands requires information describing their type, distribution, and condition. Inventories are carried out to obtain such information. The efficiency of inventories that produce statistical information can be improved by the use of remote sensing because the synoptic observation capabilities of remote sensors, particularly Landsat, make it possible to nearly eliminate sampling error. The information furnished by inventories designed to produce maps can be extended through the use of digital data manipulation techniques to include (1) quantitative measures of the spatial arrangement of a resource and (2) detection of changes in a resource over time.

Data Structuration In Coal Research And Coal Mining, Marie-Jose Roulet

LARS Symposia

This presentation of data structuration in coal research and coal mining is considered as the first step in the setting up of an operational data bank.

This structuration, according to the HBDS model, seems interesting to take into account many qualitative or/and quantitative data and to manage their relations. This application to drilling data deals with scientific and technical purposes, in coal mine.

A Georeferenced Information System For Real Time Hydrologic Modeling, Jack D. Fellows

LARS Symposia

Remotely sensed digital data (Landsat CCT) has proven an efficient and cost effective means of defining land cover information required in hydrologic modeling. However, an organization such as a county government finds great difficulty in collecting and integrating regional ancillary data (aerial photos, soils, etc) with digital remote sensed data.

A computer-based information system allowing engineers to create, access, integrate, and maintain a multi-parameter geographical data base which provides information required by the Soil Conservation Service hydrologic models is described. Land cover, soils, and elevation data are stored as arrays of cells referenced to USGS quad sheets.

A typical scenario …

Statistical Tests And Interactive Displays Of Landsat Classification Accuracies, R. Welch, Y. Hsu

LARS Symposia

In a teaching and research environment where Landsat digital data are employed on a day-to-day basis, it is often necessary to assess thematic classification accuracies in a rapid and efficient manner. While such assessments can be made by manually counting the correctly and incorrectly classified pixels in each of several test sites, this procedure is often too slow and tedious to be of effective use. Consequently, a set of interactive computer programs have been developed for use with a graphics terminal (e.g. Tektronix 4014) which determine the classification accuracies of pixels in pre-selected test sites. Results are displayed in both …

Resource Information Needs In Industry And The Role Of Remote Sensing, Robinson G. Barker

LARS Symposia

The success of any management strategy is predicated on adequate and timely information pertinent to the functional parameters of operations. The forest based industry has a special form on information need wherein its primary raw material is derived from a living, dynamic vegetative complex; the forest. Such a forest resource information system, to be viable, must portray the forest at a point in time, and mirror change as it occurs.

Traditionally, three data sources have been utilized in forest related information systems; imagery (aerial photographs), timber inventory and line maps as an output product combining the salient features of imagery …

A Lineament Enhancement Technique For Active Fault Analysis, Hiroyasu Takahashi

LARS Symposia

Lineament enhancement is an important subject in image processing. In this paper a simple but powerful lineament enhancement technique is presented, which consists of a unique differentiation and a directional filtering. A preprocessing and postprocessings are also described. And some results from LANDSAT images are selected and exhibited for comparison of the effects of several parameters in each step.

Effect Of Forest Canopy Closure On Incoming Solar Radiance, C. L. Dottavio

LARS Symposia

A previous investigation into the utility of Landsat multispectral scanner (MSS) data for detecting gypsy moth defoliation has met with limited success. The ability to separate healthy and moderate defoliation is confounded by spectral similarity and topographic effects. In order to better understand the physical processes involved in defoliation assessment from remotely sensed data, a field study was designed to investigate the effect of forest canopy closure and other environmental variables on in· coming solar radiation. Diffuse radiation measurements were recorded in red, infrared, and middle infrared wavelengths using the Mark II Three Band Field Radiometer. Results to date indicate …

Water Quality Models With Different Functions Of Exotech Radiometer Bands, K. R. Rao, R. Krishnan, A. K. Chakraborty, B. L. Deekshatulu

LARS Symposia

Surveillance of water quality by remote sensing technique can be pursued with advantage. An attempt has been made in this paper to obtain regional models of water quality of inland tanks and lakes. Stepwise multiple linear regression analysis between water quality parameters and several functions of Exotech radiometer band reflectance values, namely, bands alone, bands and their ratios, and, bands and their products are evaluated with respect to performance of the regression parameters. It is seen, that, the pairwise product of the reflectance in different bands is better correlated than the bands and their ratios. A possible explanation for this …

Computer-Based Classification Accuracy Due To The Spatial Resolution Using Per-Point Versus Per-Field Classification Techniques, Richard S. Latty, Roger M. Hoffer

LARS Symposia

The 42.5 microradian angular IFOV of the Thematic Mapper will provide a linear spatial resolution of approximately 30 meters from the nominal altitude of 710 km. This study determined the classification accuracies achieved with MSS data of four different spatial resolutions using two different types of classifiers.

The data were obtained on May 2, 1979 with the NASA NS-001 Thematic Mapper Simulator (TMS) over an area in northeastern South Carolina from a height above ground of 5945 meters. Data sets simulating three different spatial resolutions were computed from the original 15 meter nominal spatial resolution data. The classification accuracies achieved …

Remote Sensing Of Soil Trafficability Factors, James L. Kirkland

LARS Symposia

The ability of a soil to support military vehicular traffic is usually determined by using the US Army cone penetrometer. The cone index obtained from this method may be used in the AMC-74 mobility model. Moisture is an important factor in the cone index of all types of soil. Experiments indicate that the electrical resistivity of a soil is related to its moisture content. This paper describes some of these experiments and introduces a technique for aerially obtaining and machine processing soil resistivity data for the mobility model.

Radar Imagery For Forest Cover Mapping, D. J. Knowlton, R. M. Hoffer

LARS Symposia

Dual-polarized, X-band Synthetic Aperture Radar (SAR) imagery was obtained from an altitude of 60,000 feet over a test area near Camden, South Carolina on June 30, 1980. The objective of this study was to determine, qualitatively, the value of the SAR imagery for identifying various forest cover types. In analyzing the HH and HV polarization images, particular attention was given to the tonal and textural characteristics of the cover types involved.

The analysis of the dual-polarized SAR imagery has shown that certain forest cover features are more easily identified in one polarization than the other, while some features look very …

Effects Of Nitrogen Nutrition On The Growth, Yield And Reflectance Characteristics Of Corn Canopies, G. Walburg, M. E. Bauer, C. S. T. Daughtry

LARS Technical Reports

An experiment was conducted in which spectral and agronomic measurements were collected from corn (Zea mays L.) canopies under four nitrogen treatment levels (0, 67, 134, and 202 kg/ha) at the Purdue Agronomy Farm, W. Lafayette, IN, on 11 dates during 1978 and 12 dates during 1979. Spectral measurements over the 0.4 to 2.4 µm wavelength region were acquired with a spectroradiometer and used to compute reflectance factor. Agronomic data collected included biomass, leaf area index, plant height, crop development stage, and percent soil cover. Data were analyzed to determine: (1) the relationship between the spectral responses of canopies and …

A Tutoring Dialogue: From Workshop To Session, Cheryl Clark, Phyllis A. Sherwood

The Writing Center Journal

No abstract provided.

Things Fall Apart: The Writing Center Will Hold, Tilly Eggers

The Writing Center Journal

No abstract provided.

Prediction And Control Of Field Swell Pressures Of Compacted Medium Plastic Clay : Interim Report, Gregory Matthew Terdich

JTRP Technical Reports

No abstract provided.

A Rockwell Hardness Test For Portland Cement Concrete, Douglas Windslow

JTRP Technical Reports

No abstract provided.

Accommodating The Iq And Learning Style Of A Student Writer, N. Rabianski

The Writing Center Journal

No abstract provided.

Working With The Esl Student: Learning Patience, Making Progress, Christopher J. Thaiss, Carolyn Kurylo

The Writing Center Journal

No abstract provided.

Treatment Of Sanitary Wastes At Interstate Rest Areas, James E. Etzel

JTRP Technical Reports

No abstract provided.

Pore Size Distribution Of Sandy Soils And The Prediction Of Permeability : Interim Report, Charng-Hsein Juang

JTRP Technical Reports

No abstract provided.

Food Prices: Farm And Retail (A Tale Of Three Products), R. L. Kohls

Historical Documents of the Purdue Cooperative Extension Service Archive

No abstract provided.

The $'S And ¢'S Of Grain Crop Production On Family Farms, Paul R. Robbins

Historical Documents of the Purdue Cooperative Extension Service Archive

No abstract provided.

Facings, Lois M. Gotwals

Historical Documents of the Purdue Cooperative Extension Service Archive

No abstract provided.

Some Computational Aspects Of Queueing Network Models, Herb Schwetman

Department of Computer Science Technical Reports

No abstract provided.

Interfacings, Lois M. Gotwals

Historical Documents of the Purdue Cooperative Extension Service Archive

No abstract provided.