GIS Applications in Geology

K. Tharani131863

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Importance and usage of geology

Case study on preparation and evaluation of geological maps

in 3D GIS environment

Results

Contents

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A Geographic Information System (GIS) is a computer

system for capturing, storing, querying, analyzing and

displaying geospatial data.

Engineering geology is the application of the geologic

sciences to engineering practice for the purpose of assuring

that the geologic factors affecting the location, design,

construction, operation and maintenance of engineering works

are recognized.

GIS and Geology

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Importance of geology

GIS technology has refined

and improved the power of

traditional mapping by

facilitating the production

of cross sections and 3D

images of buried geological

features

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GIS is the best tool for geological and morphological

mapping.

Mostly 2-dimensional GIS is used in many different

application fields. Even this 2-dimensional GIS is used for

many geo scientific studies, 3-dimensional modeling must be

used if variation of subsurface is needed.

Usage of GIS

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Study area is Kadikoy Municipality of Istanbul metropolitan

area.

3D GIS uses x, y, z values for processing the data. Here z

values correspond to the bore hole data.

GIS has four segments namely input , management,

processing and output.

Case study

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Pseudo 3D GIS applications

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Contd..

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Alluvial deposits

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3-dimensional GIS can provide functionality for creating,

managing, manipulating and analyzing 3-dimensional data.

The attribute, which was used as in the z-direction (depth), is

based on soil grain size. The changing of grain size with the

depth is obviously seen in the studied area is shown in the

figure

 

Real 3D GIS applications

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Contd..

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Pseudo 3D GIS is obtained by complementing graphs with

2D GIS

“Real 3-dimensional GIS” has the capability of more realistic

visualization.

The location of subsurface structures are obviously visible on

the volumetric diagram in the real 3-dimensional GIS

Results

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