hig.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Construction of a solid 3D model of geology in Sardinia using GIS methods
University of Gävle, Department of Technology and Built Environment.
2009 (English)Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

Abstract

3D visualization of geological structures is a very efficient way to create a good understanding of geological features. It is not only an illustrative way for common people, but also a comprehensive method to interpret results of the work. Geologists, geophysics engineers and GIS experts sometimes need to visualize an area to accomplish their researches. It can show how sample data are distributed over the area and therefore they can be applied as suitable approach to validate the result. Among different 3D modeling methods, some are expensive or complicated. Therefore, such a methodology enabling easy and cheap creation of a 3D construction is highly demanded.

However, several obstacles have been faced during the process of constructing a 3D model of geology. The main debate over suitable interpolation methods is the fact that 3D modelers may face discrepancies leading to different results even when they are working with the same set of data. Furthermore, most often part of data can be source of errors, themselves. Hence, it is extremely important to decide whether to omit those data or adopt another strategy. However, even after considering all these points, still the work may not be accurate enough to be used for scientific researches if the interpretation of work is not done precisely. This research sought to explain an approach for 3D modeling of Sedini platform in Sardinia, Italy. GIS was used as a flexible software together with Surfer and Voxler. Data manipulation, geodatabase creation and interpolation test all have been done with aid of GIS. A variety of interpolation methods available in Surfer were used to opt suitable method together with Arc view.

A solid 3D model is created in Voxler environment. In Voxler, in contrary to many other 3D types of software there are four components needed to construct 3D. C value as 4th component except for XYZ coordinates was used to differentiate special features in platform and do gridding based on chosen value. With the aid of C value, one can mark layer of interest to identify it from other layers.

The final result shows a 3D solid model of the Sedini platform including both surfaces and subsurfaces. An Isosurface with its unique value (Isovalue) can mark layer of interest and make it easy to interpret the results. However, the errors in some parts of model are also noticeable. Since data acquisition was done for studying geology and mineralogy characteristics of the area, there is less number of data points collected per volume according to the main goals of the initial project. Moreover, in some parts of geological border lines, the density of sample points is not high enough to estimate accurate location of lines.

The study result can be applicable in a broad range of geological studies. Resource evaluation, geomorphology, structural geology and GIS are only a few examples of its application. The results of the study can be compared to the results of similar works where different softwares have been used so as to comprehend pros and cons of each as well as appropriate application of each software for a special task.

 

 

Keywords: GIS, Image Interpretation, Geodatabase, Geology, Interpolation, 3D Modeling

 

 

 

Place, publisher, year, edition, pages
2009. , 41 p.
Keyword [en]
GIS, 3D solid model, Model interpretation, Interpolation, Geology
National Category
Agricultural Science Computer Vision and Robotics (Autonomous Systems) Environmental Analysis and Construction Information Technology
Identifiers
URN: urn:nbn:se:hig:diva-3773Archive number: TEX080714OAI: oai:DiVA.org:hig-3773DiVA: diva2:174075
Presentation
(English)
Uppsok
teknik
Supervisors
Examiners
Available from: 2009-02-20 Created: 2009-02-19 Last updated: 2009-02-20Bibliographically approved

Open Access in DiVA

fulltext(1825 kB)7197 downloads
File information
File name FULLTEXT01.pdfFile size 1825 kBChecksum SHA-512
4905345740bddb92f5a80dfad48f0e700b0bec950d3fdfbb9df64ca1bc9651ba107798963957a63e9878a52f4d7a3b307ac2c01f17b435b282c0214624143df2
Type fulltextMimetype application/pdf

By organisation
Department of Technology and Built Environment
Agricultural ScienceComputer Vision and Robotics (Autonomous Systems)Environmental Analysis and Construction Information Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 7197 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 770 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf