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ID 27362
file
title alternative
An Example of Processing Geometric Data from Geological Body on a Personal Computer.
creator
Yoshimura, Norihisa
Yoshino, Gensei
NDC
Earth sciences. Geology
abstract
This paper deals with an example of processing geometric data from geological body on a personal computer (NEC PC9801VX21).

Orientation diagrams, being familier to the study in geology, are made by computer graphics. This program has been composed of BASIC.

Large masses consisting of rhyolite and granite occur in the Tateiwa district of Hiroshima Prefecture. For each of joint surfaces observed on the outcrops of these masses, the attitude was determined by measureing the strike and dip. The point diagram and contour diagram of these measurements, which are plotted on the lower hemisphere of equal-area-net, are shown on computer display.

In this conture diagram of the graphics, 16 gardes defining degree of preference in orientation are represented by different kinds of color. Each circle (one percent area) inscribed about each point is painted one by one, then, areas of overlapping other circles are repainted with the color choiced according to overlapping numbers. 16 colors are arranged for the repainting.

The time needed to complete the contour diagram of 100 points is about 10 minutes (with BASIC Compiler).
journal title
Bulletin of the Faculty of School Education, Hiroshima University. Part II
volume
Volume 10
start page
135
end page
142
date of issued
1987-12-25
publisher
広島大学学校教育学部
issn
0387-4869
ncid
language
jpn
nii type
Departmental Bulletin Paper
HU type
Departmental Bulletin Papers
DCMI type
text
format
application/pdf
text version
publisher
department
Graduate School of Education
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