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Rendering a 3D City.
KTH, School of Computer Science and Communication (CSC).
KTH, School of Computer Science and Communication (CSC).
2012 (English)Independent thesis Advanced level (professional degree), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

The purpose of this paper is to look at the possibilities to render a three dimensional replica of an area based on coordinates taken from a LIDAR map. Given x, y, z coordinates, we want to find out if the rendered world is usable as a map reference for real life scenarios and if you can include landmarks based on locations taken from the OpenStreetMap. We will try to determine if this method is usable on urban areas such as the KTH Campus. We will also try to evaluate how well this method scales with larger maps and what kind of resolution that is needed on the LIDAR map. Using an open source program called Blender we were able to import the coordinates and render a three dimensional world. There was a lot of work that needed to be done with the data, such as removing doublets and false information before the import. We concluded that this technique heavily depends on the quality of the data and it's not the optimal choice to use when rendering urban areas. However we think that this method could prove very useful when rendering less detailed areas such as open fields with soft contours. There was a problem with scalability in Blender that forced us to use a smaller version of the map. Areas such as the KTH Campus or smaller towns contains a lot of information that needs to be rendered. This can be solved by programmatically loading the data as the user moves around the map.

Abstract [sv]

Målet med denna rapport är att titta på möjligheterna att skapa en renderad värld i tre dimensioner utifrån koordinater tagna från LIDAR data. Med hjälp av x, y och z koordinater vill vi ta reda på om den renderade världen går att använda som referens i verkligenheten. Vi ska titta på möjligheterna att hämta intressesanta platser från OpenStreetMap och inkludera dessa. Vi ska avgöra om denna metod är användar över stadsområden, till exemplem KTHs campus. Vi ska även testa hur bra denna metod skalar när det kommer till större områden samt vilken upplösning som behövs på LIDAR datan. Med hjälp av programmet Blender så kunde vi importera LIDAR datan och rendera en tredimensionell värld. Vi var tvungna att lägga ned mycket arbete på att redigera datan då den innehöll dubletter och fel information. Vi kom fram till att denna metod beror mycket på hur bra LIDAR datan. Metoden passar inte särskilt bra till stadsområden utan gör sig bättre för områden med mindre detaljer, så som öppna fält. Vi kom även fram till att det finns problem med skalbarheten hos Blender. Vi var tvugna att använda mindre kartor då Blender inte klarade av att hantera antalet koordinater som ursprungskartorna innehöll. Problemet med skalbarhet kan dock lösas om man hämtar ny information dynamiskt.

Place, publisher, year, edition, pages
2012.
Series
Kandidatexjobb CSC, K12053
National Category
Computer Science
Identifiers
URN: urn:nbn:se:kth:diva-131058OAI: oai:DiVA.org:kth-131058DiVA: diva2:654504
Educational program
Master of Science in Engineering - Computer Science and Technology
Uppsok
Technology
Supervisors
Examiners
Available from: 2013-10-07 Created: 2013-10-07

Open Access in DiVA

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Other links

http://www.csc.kth.se/utbildning/kandidatexjobb/datateknik/2012/rapport/nordgren_otto_OCH_stange_yuri_K12053.pdf
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