Masters Theses

Shih-Tsu Chen

Abstract

"Three types of maps of Taiwan were made by using color composites of ERTS-1 images. The three types of maps, consisting of a regional land use map, an offshore sediment distribution map, and a tectonic map, were made from a color composite imagery utilizing Diazo chrome and Esco chrome films with a planimetrically accuracy sufficient for a 1:1,000,000 scale map.

Color enhanced imagery was found to increase the accuracy level of the land use interpretation. Three color enhancement techniques were used to increase the color contrast between the scenes of different land use. Particular land use scenes required a special color enhancement method which was derived from the curves of density vs. wavelength sensitivity (band number) and D-log E curves of the scenes on the films.

Sequential coverage of similar areas was found to be of advantage for preparing land use maps because of the possibility of land use changes. Such was the case on distinguishing bare soil from recently plowed crop land. Personal knowledge of the area was important in interpretating ambiguous scenes.

A method was developed to discriminate between turbidity, bottom sediment, and coarse, suspended solids in water during the mapping of offshore sediments. Measurement of the values of percentage of light transmission of the scenes on the MSS 5 and MSS 7 films can be used to discriminate such parameters by analyzing the ratio of the values of percentage of light transmission of MSS 5/MSS 7.

The isodensity contour line method was first tried for mapping the distribution of the bottom sediment, but it proved to be unsuitable. Direct tracing on MSS 7 and MSS 5 images was then used in mapping the off-shore sediments. MSS 7 images were used for delineating sediments appearing at water's surface, MSS 5 images were used in delineating shallow bottom sediments.

Bedding traces, faults, and many undefined lineation's were mapped by directly delineating them on the color composite imagery. Many were not recorded on the published geological maps. Some wave-shaped patterns of bedding traces were used in determining the direction of the dips of the beddings. If the wave-shaped pattern of bedding traces on the ERTS-l imagery could be identified, the magnitude of the dips would be in the range of 20º-50º"-- Abstract, pp. ii-iii

Advisor(s)

Barr, David J.

Committee Member(s)

Illegible Signature
Rupert, Gerald B., 1930-2016

Department(s)

Geosciences and Geological and Petroleum Engineering

Degree Name

M.S. in Geological Engineering

Publisher

University of Missouri--Rolla

Publication Date

1974

Pagination

viii, 66 pages

Note about bibliography

Includes bibliographical references (pages 60-62)

Rights

© 1974 Shih-Tsu Chen, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Thesis Number

T 4002

Print OCLC #

5981671

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