63.gis
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63.gis

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63.gis 63.gis Presentation Transcript

  • K. Tharani 131863
  •  Importance and usage of geology  Case study on preparation and evaluation of geological maps in 3D GIS environment  Results 2
  •  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. 3
  •  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 4
  •  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. 5
  •  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. 6
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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 10
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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 12
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