ePrints.FRI - University of Ljubljana, Faculty of Computer and Information Science

Interactive visualization of spatial data in Unity3D

Nejc Smrkolj Koželj (2017) Interactive visualization of spatial data in Unity3D. EngD thesis.

Download (2886Kb)


    In our thesis, we developed a prototype of an interactive 3D terrain visualization of Slovenia. We merged LiDAR data in form of height maps with orthophoto images, which were downloaded from the Slovenian Environment Agency's servers. We developed the prototype in Unity3D with programming language C\#. For successful interactive visualization, we implemented multiple support systems. We divided the terrain into tiles. Each tile consists of metadata and terrain. The terrain was generated from height maps and ortophoto images. For correct alignment, we implemented an offset alignment system and control point system. Because of a high number of tiles, we implemented a level of detail system. The closer the camera is to the terrain, the higher resolution tiles are loaded and shown. The system also helped us with better memory management, as there are fewer tiles loaded in the memory. Tiles are linked together into a hierarchy, which is managed by a data structure called TreeStructure, which is grouping tiles into 3$\times$3 grid. Images were loaded and processed asynchronously, via coroutines, which helped us maintain a responsive user interface. For additional performance gains, all images were converted to a proprietary format, which enabled us to use faster Unity functions.

    Item Type: Thesis (EngD thesis)
    Keywords: Unity, DOF, Interactive, Visualization, Orthophoto, Terrain, Slovenia, LIDAR, LOD
    Number of Pages: 43
    Language of Content: Slovenian
    Mentor / Comentors:
    Name and SurnameIDFunction
    doc. dr. Matija Marolt271Mentor
    Link to COBISS: http://www.cobiss.si/scripts/cobiss?command=search&base=51012&select=(ID=1537459651)
    Institution: University of Ljubljana
    Department: Faculty of Computer and Information Science
    Item ID: 3860
    Date Deposited: 27 Jun 2017 11:19
    Last Modified: 06 Jul 2017 11:27
    URI: http://eprints.fri.uni-lj.si/id/eprint/3860

    Actions (login required)

    View Item